/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_spec14_product31.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 05:56:13,073 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 05:56:13,078 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 05:56:13,136 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 05:56:13,137 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 05:56:13,142 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 05:56:13,146 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 05:56:13,154 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 05:56:13,158 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 05:56:13,165 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 05:56:13,167 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 05:56:13,169 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 05:56:13,169 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 05:56:13,170 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 05:56:13,176 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 05:56:13,178 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 05:56:13,179 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 05:56:13,182 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 05:56:13,190 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 05:56:13,199 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 05:56:13,202 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 05:56:13,204 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 05:56:13,206 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 05:56:13,209 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 05:56:13,219 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 05:56:13,225 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 05:56:13,227 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 05:56:13,229 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 05:56:13,230 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 05:56:13,231 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 05:56:13,231 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 05:56:13,232 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 05:56:13,232 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 05:56:13,233 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 05:56:13,234 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 05:56:13,235 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 05:56:13,236 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 05:56:13,287 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 05:56:13,287 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 05:56:13,292 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 05:56:13,292 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 05:56:13,293 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 05:56:13,293 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 05:56:13,293 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 05:56:13,293 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 05:56:13,293 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 05:56:13,294 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 05:56:13,295 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 05:56:13,296 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 05:56:13,296 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 05:56:13,296 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 05:56:13,296 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 05:56:13,296 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 05:56:13,297 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 05:56:13,297 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 05:56:13,297 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 05:56:13,297 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 05:56:13,298 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 05:56:13,298 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 05:56:13,298 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 05:56:13,299 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 05:56:13,299 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 05:56:13,299 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 05:56:13,731 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 05:56:13,771 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 05:56:13,775 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 05:56:13,777 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 05:56:13,778 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 05:56:13,779 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec14_product31.cil.c [2020-12-22 05:56:13,850 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c88d9fe30/3a1a094ba9ba40719708c7bd8377090a/FLAGbea9a6ecb [2020-12-22 05:56:14,620 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 05:56:14,624 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec14_product31.cil.c [2020-12-22 05:56:14,671 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c88d9fe30/3a1a094ba9ba40719708c7bd8377090a/FLAGbea9a6ecb [2020-12-22 05:56:14,777 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c88d9fe30/3a1a094ba9ba40719708c7bd8377090a [2020-12-22 05:56:14,785 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 05:56:14,788 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 05:56:14,796 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 05:56:14,796 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 05:56:14,801 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 05:56:14,802 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:56:14" (1/1) ... [2020-12-22 05:56:14,805 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@669bb001 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:56:14, skipping insertion in model container [2020-12-22 05:56:14,805 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:56:14" (1/1) ... [2020-12-22 05:56:14,819 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 05:56:14,945 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 05:56:15,691 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec14_product31.cil.c[70826,70839] [2020-12-22 05:56:15,701 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:56:15,719 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 05:56:15,939 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_spec14_product31.cil.c[70826,70839] [2020-12-22 05:56:15,940 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:56:16,014 INFO L208 MainTranslator]: Completed translation [2020-12-22 05:56:16,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:56:16 WrapperNode [2020-12-22 05:56:16,015 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 05:56:16,016 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 05:56:16,016 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 05:56:16,016 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 05:56:16,024 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:56:16" (1/1) ... [2020-12-22 05:56:16,056 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:56:16" (1/1) ... [2020-12-22 05:56:16,610 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 05:56:16,613 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 05:56:16,614 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 05:56:16,614 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 05:56:16,625 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:56:16" (1/1) ... [2020-12-22 05:56:16,625 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:56:16" (1/1) ... [2020-12-22 05:56:16,836 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:56:16" (1/1) ... [2020-12-22 05:56:16,837 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:56:16" (1/1) ... [2020-12-22 05:56:17,248 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:56:16" (1/1) ... [2020-12-22 05:56:17,534 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:56:16" (1/1) ... [2020-12-22 05:56:17,588 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:56:16" (1/1) ... [2020-12-22 05:56:17,689 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 05:56:17,691 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 05:56:17,691 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 05:56:17,691 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 05:56:17,692 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:56:16" (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 05:56:17,812 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 05:56:17,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 05:56:17,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 05:56:17,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 05:56:36,105 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 05:56:36,105 INFO L299 CfgBuilder]: Removed 2083 assume(true) statements. [2020-12-22 05:56:36,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:56:36 BoogieIcfgContainer [2020-12-22 05:56:36,116 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 05:56:36,118 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 05:56:36,118 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 05:56:36,122 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 05:56:36,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 05:56:14" (1/3) ... [2020-12-22 05:56:36,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45611287 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:56:36, skipping insertion in model container [2020-12-22 05:56:36,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:56:16" (2/3) ... [2020-12-22 05:56:36,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45611287 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:56:36, skipping insertion in model container [2020-12-22 05:56:36,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:56:36" (3/3) ... [2020-12-22 05:56:36,125 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product31.cil.c [2020-12-22 05:56:36,132 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 05:56:36,141 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-12-22 05:56:36,162 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-12-22 05:56:36,222 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 05:56:36,222 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 05:56:36,223 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 05:56:36,223 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 05:56:36,223 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 05:56:36,223 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 05:56:36,223 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 05:56:36,223 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 05:56:36,354 INFO L276 IsEmpty]: Start isEmpty. Operand 8857 states. [2020-12-22 05:56:36,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 05:56:36,377 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:56:36,379 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:56:36,379 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 05:56:36,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:56:36,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1907432599, now seen corresponding path program 1 times [2020-12-22 05:56:36,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:56:36,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840179576] [2020-12-22 05:56:36,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:56:36,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:56:36,845 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 05:56:36,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840179576] [2020-12-22 05:56:36,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:56:36,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 05:56:36,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165412309] [2020-12-22 05:56:36,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 05:56:36,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:56:36,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 05:56:36,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 05:56:36,877 INFO L87 Difference]: Start difference. First operand 8857 states. Second operand 3 states. [2020-12-22 05:56:37,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:56:37,612 INFO L93 Difference]: Finished difference Result 21278 states and 40082 transitions. [2020-12-22 05:56:37,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 05:56:37,614 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 44 [2020-12-22 05:56:37,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:56:37,739 INFO L225 Difference]: With dead ends: 21278 [2020-12-22 05:56:37,739 INFO L226 Difference]: Without dead ends: 12425 [2020-12-22 05:56:37,769 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 05:56:37,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12425 states. [2020-12-22 05:56:38,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12425 to 8853. [2020-12-22 05:56:38,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8853 states. [2020-12-22 05:56:38,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8853 states to 8853 states and 16664 transitions. [2020-12-22 05:56:38,392 INFO L78 Accepts]: Start accepts. Automaton has 8853 states and 16664 transitions. Word has length 44 [2020-12-22 05:56:38,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:56:38,393 INFO L481 AbstractCegarLoop]: Abstraction has 8853 states and 16664 transitions. [2020-12-22 05:56:38,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 05:56:38,393 INFO L276 IsEmpty]: Start isEmpty. Operand 8853 states and 16664 transitions. [2020-12-22 05:56:38,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-22 05:56:38,397 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:56:38,398 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:56:38,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 05:56:38,399 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 05:56:38,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:56:38,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1807660893, now seen corresponding path program 1 times [2020-12-22 05:56:38,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:56:38,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424435524] [2020-12-22 05:56:38,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:56:38,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:56:38,810 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 05:56:38,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424435524] [2020-12-22 05:56:38,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:56:38,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 05:56:38,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507063814] [2020-12-22 05:56:38,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:56:38,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:56:38,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:56:38,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:56:38,814 INFO L87 Difference]: Start difference. First operand 8853 states and 16664 transitions. Second operand 6 states. [2020-12-22 05:56:40,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:56:40,316 INFO L93 Difference]: Finished difference Result 24760 states and 46608 transitions. [2020-12-22 05:56:40,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 05:56:40,317 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 49 [2020-12-22 05:56:40,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:56:40,418 INFO L225 Difference]: With dead ends: 24760 [2020-12-22 05:56:40,419 INFO L226 Difference]: Without dead ends: 15949 [2020-12-22 05:56:40,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-12-22 05:56:40,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15949 states. [2020-12-22 05:56:40,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15949 to 8849. [2020-12-22 05:56:40,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8849 states. [2020-12-22 05:56:40,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8849 states to 8849 states and 16653 transitions. [2020-12-22 05:56:40,946 INFO L78 Accepts]: Start accepts. Automaton has 8849 states and 16653 transitions. Word has length 49 [2020-12-22 05:56:40,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:56:40,946 INFO L481 AbstractCegarLoop]: Abstraction has 8849 states and 16653 transitions. [2020-12-22 05:56:40,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 05:56:40,947 INFO L276 IsEmpty]: Start isEmpty. Operand 8849 states and 16653 transitions. [2020-12-22 05:56:40,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 05:56:40,950 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:56:40,951 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:56:40,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 05:56:40,951 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 05:56:40,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:56:40,952 INFO L82 PathProgramCache]: Analyzing trace with hash 176917373, now seen corresponding path program 1 times [2020-12-22 05:56:40,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:56:40,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436902550] [2020-12-22 05:56:40,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:56:40,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:56:41,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:56:41,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436902550] [2020-12-22 05:56:41,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:56:41,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 05:56:41,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535079937] [2020-12-22 05:56:41,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 05:56:41,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:56:41,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 05:56:41,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 05:56:41,048 INFO L87 Difference]: Start difference. First operand 8849 states and 16653 transitions. Second operand 4 states. [2020-12-22 05:56:42,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:56:42,462 INFO L93 Difference]: Finished difference Result 28294 states and 53250 transitions. [2020-12-22 05:56:42,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 05:56:42,462 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2020-12-22 05:56:42,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:56:42,525 INFO L225 Difference]: With dead ends: 28294 [2020-12-22 05:56:42,525 INFO L226 Difference]: Without dead ends: 19487 [2020-12-22 05:56:42,546 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 05:56:42,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19487 states. [2020-12-22 05:56:43,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19487 to 8849. [2020-12-22 05:56:43,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8849 states. [2020-12-22 05:56:43,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8849 states to 8849 states and 16649 transitions. [2020-12-22 05:56:43,098 INFO L78 Accepts]: Start accepts. Automaton has 8849 states and 16649 transitions. Word has length 50 [2020-12-22 05:56:43,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:56:43,098 INFO L481 AbstractCegarLoop]: Abstraction has 8849 states and 16649 transitions. [2020-12-22 05:56:43,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 05:56:43,099 INFO L276 IsEmpty]: Start isEmpty. Operand 8849 states and 16649 transitions. [2020-12-22 05:56:43,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 05:56:43,103 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:56:43,103 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:56:43,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 05:56:43,104 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 05:56:43,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:56:43,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1421155584, now seen corresponding path program 1 times [2020-12-22 05:56:43,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:56:43,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992034836] [2020-12-22 05:56:43,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:56:43,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:56:43,197 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 05:56:43,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992034836] [2020-12-22 05:56:43,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:56:43,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 05:56:43,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771368107] [2020-12-22 05:56:43,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 05:56:43,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:56:43,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 05:56:43,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 05:56:43,203 INFO L87 Difference]: Start difference. First operand 8849 states and 16649 transitions. Second operand 4 states. [2020-12-22 05:56:44,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:56:44,148 INFO L93 Difference]: Finished difference Result 21222 states and 39942 transitions. [2020-12-22 05:56:44,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 05:56:44,149 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-12-22 05:56:44,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:56:44,190 INFO L225 Difference]: With dead ends: 21222 [2020-12-22 05:56:44,190 INFO L226 Difference]: Without dead ends: 12415 [2020-12-22 05:56:44,211 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 05:56:44,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12415 states. [2020-12-22 05:56:44,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12415 to 8849. [2020-12-22 05:56:44,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8849 states. [2020-12-22 05:56:44,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8849 states to 8849 states and 16640 transitions. [2020-12-22 05:56:44,694 INFO L78 Accepts]: Start accepts. Automaton has 8849 states and 16640 transitions. Word has length 51 [2020-12-22 05:56:44,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:56:44,695 INFO L481 AbstractCegarLoop]: Abstraction has 8849 states and 16640 transitions. [2020-12-22 05:56:44,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 05:56:44,695 INFO L276 IsEmpty]: Start isEmpty. Operand 8849 states and 16640 transitions. [2020-12-22 05:56:44,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 05:56:44,699 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:56:44,699 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:56:44,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 05:56:44,699 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 05:56:44,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:56:44,700 INFO L82 PathProgramCache]: Analyzing trace with hash 615660194, now seen corresponding path program 1 times [2020-12-22 05:56:44,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:56:44,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224494104] [2020-12-22 05:56:44,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:56:44,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:56:44,812 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 05:56:44,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224494104] [2020-12-22 05:56:44,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:56:44,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 05:56:44,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366271984] [2020-12-22 05:56:44,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 05:56:44,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:56:44,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 05:56:44,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 05:56:44,816 INFO L87 Difference]: Start difference. First operand 8849 states and 16640 transitions. Second operand 4 states. [2020-12-22 05:56:45,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:56:45,684 INFO L93 Difference]: Finished difference Result 21222 states and 39924 transitions. [2020-12-22 05:56:45,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 05:56:45,687 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2020-12-22 05:56:45,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:56:45,726 INFO L225 Difference]: With dead ends: 21222 [2020-12-22 05:56:45,726 INFO L226 Difference]: Without dead ends: 12415 [2020-12-22 05:56:45,740 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 05:56:45,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12415 states. [2020-12-22 05:56:46,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12415 to 8849. [2020-12-22 05:56:46,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8849 states. [2020-12-22 05:56:46,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8849 states to 8849 states and 16631 transitions. [2020-12-22 05:56:46,189 INFO L78 Accepts]: Start accepts. Automaton has 8849 states and 16631 transitions. Word has length 52 [2020-12-22 05:56:46,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:56:46,190 INFO L481 AbstractCegarLoop]: Abstraction has 8849 states and 16631 transitions. [2020-12-22 05:56:46,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 05:56:46,190 INFO L276 IsEmpty]: Start isEmpty. Operand 8849 states and 16631 transitions. [2020-12-22 05:56:46,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 05:56:46,195 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:56:46,195 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:56:46,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 05:56:46,196 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 05:56:46,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:56:46,196 INFO L82 PathProgramCache]: Analyzing trace with hash 706942754, now seen corresponding path program 1 times [2020-12-22 05:56:46,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:56:46,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112022455] [2020-12-22 05:56:46,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:56:46,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:56:46,291 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 05:56:46,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112022455] [2020-12-22 05:56:46,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:56:46,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 05:56:46,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789154151] [2020-12-22 05:56:46,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 05:56:46,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:56:46,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 05:56:46,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 05:56:46,295 INFO L87 Difference]: Start difference. First operand 8849 states and 16631 transitions. Second operand 4 states. [2020-12-22 05:56:47,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:56:47,109 INFO L93 Difference]: Finished difference Result 24737 states and 46522 transitions. [2020-12-22 05:56:47,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 05:56:47,109 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2020-12-22 05:56:47,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:56:47,160 INFO L225 Difference]: With dead ends: 24737 [2020-12-22 05:56:47,161 INFO L226 Difference]: Without dead ends: 15909 [2020-12-22 05:56:47,177 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 05:56:47,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15909 states. [2020-12-22 05:56:47,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15909 to 8831. [2020-12-22 05:56:47,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8831 states. [2020-12-22 05:56:47,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8831 states to 8831 states and 16600 transitions. [2020-12-22 05:56:47,679 INFO L78 Accepts]: Start accepts. Automaton has 8831 states and 16600 transitions. Word has length 52 [2020-12-22 05:56:47,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:56:47,679 INFO L481 AbstractCegarLoop]: Abstraction has 8831 states and 16600 transitions. [2020-12-22 05:56:47,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 05:56:47,680 INFO L276 IsEmpty]: Start isEmpty. Operand 8831 states and 16600 transitions. [2020-12-22 05:56:47,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 05:56:47,683 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:56:47,683 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:56:47,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 05:56:47,684 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 05:56:47,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:56:47,685 INFO L82 PathProgramCache]: Analyzing trace with hash -630090235, now seen corresponding path program 1 times [2020-12-22 05:56:47,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:56:47,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784522410] [2020-12-22 05:56:47,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:56:47,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:56:47,745 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 05:56:47,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784522410] [2020-12-22 05:56:47,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:56:47,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 05:56:47,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895872839] [2020-12-22 05:56:47,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 05:56:47,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:56:47,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 05:56:47,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 05:56:47,747 INFO L87 Difference]: Start difference. First operand 8831 states and 16600 transitions. Second operand 4 states. [2020-12-22 05:56:48,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:56:48,386 INFO L93 Difference]: Finished difference Result 21186 states and 39841 transitions. [2020-12-22 05:56:48,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 05:56:48,386 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-12-22 05:56:48,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:56:48,423 INFO L225 Difference]: With dead ends: 21186 [2020-12-22 05:56:48,424 INFO L226 Difference]: Without dead ends: 12376 [2020-12-22 05:56:48,437 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 05:56:48,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12376 states. [2020-12-22 05:56:48,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12376 to 8831. [2020-12-22 05:56:48,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8831 states. [2020-12-22 05:56:48,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8831 states to 8831 states and 16594 transitions. [2020-12-22 05:56:48,889 INFO L78 Accepts]: Start accepts. Automaton has 8831 states and 16594 transitions. Word has length 53 [2020-12-22 05:56:48,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:56:48,889 INFO L481 AbstractCegarLoop]: Abstraction has 8831 states and 16594 transitions. [2020-12-22 05:56:48,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 05:56:48,889 INFO L276 IsEmpty]: Start isEmpty. Operand 8831 states and 16594 transitions. [2020-12-22 05:56:48,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 05:56:48,893 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:56:48,893 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:56:48,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 05:56:48,893 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 05:56:48,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:56:48,894 INFO L82 PathProgramCache]: Analyzing trace with hash -556177977, now seen corresponding path program 1 times [2020-12-22 05:56:48,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:56:48,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071353320] [2020-12-22 05:56:48,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:56:48,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:56:48,984 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 05:56:48,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071353320] [2020-12-22 05:56:48,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:56:48,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 05:56:48,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370916234] [2020-12-22 05:56:48,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 05:56:48,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:56:48,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 05:56:48,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 05:56:48,987 INFO L87 Difference]: Start difference. First operand 8831 states and 16594 transitions. Second operand 4 states. [2020-12-22 05:56:49,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:56:49,681 INFO L93 Difference]: Finished difference Result 21186 states and 39829 transitions. [2020-12-22 05:56:49,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 05:56:49,682 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2020-12-22 05:56:49,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:56:49,733 INFO L225 Difference]: With dead ends: 21186 [2020-12-22 05:56:49,733 INFO L226 Difference]: Without dead ends: 12376 [2020-12-22 05:56:49,747 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 05:56:49,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12376 states. [2020-12-22 05:56:50,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12376 to 8831. [2020-12-22 05:56:50,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8831 states. [2020-12-22 05:56:50,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8831 states to 8831 states and 16588 transitions. [2020-12-22 05:56:50,282 INFO L78 Accepts]: Start accepts. Automaton has 8831 states and 16588 transitions. Word has length 54 [2020-12-22 05:56:50,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:56:50,284 INFO L481 AbstractCegarLoop]: Abstraction has 8831 states and 16588 transitions. [2020-12-22 05:56:50,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 05:56:50,285 INFO L276 IsEmpty]: Start isEmpty. Operand 8831 states and 16588 transitions. [2020-12-22 05:56:50,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 05:56:50,288 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:56:50,288 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] [2020-12-22 05:56:50,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 05:56:50,288 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 05:56:50,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:56:50,289 INFO L82 PathProgramCache]: Analyzing trace with hash 928566412, now seen corresponding path program 1 times [2020-12-22 05:56:50,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:56:50,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198442759] [2020-12-22 05:56:50,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:56:50,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:56:50,349 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 05:56:50,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198442759] [2020-12-22 05:56:50,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:56:50,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 05:56:50,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542898752] [2020-12-22 05:56:50,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 05:56:50,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:56:50,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 05:56:50,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 05:56:50,357 INFO L87 Difference]: Start difference. First operand 8831 states and 16588 transitions. Second operand 3 states. [2020-12-22 05:56:50,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:56:50,895 INFO L93 Difference]: Finished difference Result 21177 states and 39806 transitions. [2020-12-22 05:56:50,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 05:56:50,896 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 55 [2020-12-22 05:56:50,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:56:50,920 INFO L225 Difference]: With dead ends: 21177 [2020-12-22 05:56:50,920 INFO L226 Difference]: Without dead ends: 12367 [2020-12-22 05:56:50,929 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 05:56:50,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12367 states. [2020-12-22 05:56:51,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12367 to 8831. [2020-12-22 05:56:51,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8831 states. [2020-12-22 05:56:51,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8831 states to 8831 states and 16587 transitions. [2020-12-22 05:56:51,286 INFO L78 Accepts]: Start accepts. Automaton has 8831 states and 16587 transitions. Word has length 55 [2020-12-22 05:56:51,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:56:51,287 INFO L481 AbstractCegarLoop]: Abstraction has 8831 states and 16587 transitions. [2020-12-22 05:56:51,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 05:56:51,287 INFO L276 IsEmpty]: Start isEmpty. Operand 8831 states and 16587 transitions. [2020-12-22 05:56:51,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 05:56:51,292 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:56:51,292 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:56:51,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 05:56:51,292 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 05:56:51,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:56:51,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1772571914, now seen corresponding path program 1 times [2020-12-22 05:56:51,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:56:51,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651955624] [2020-12-22 05:56:51,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:56:51,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:56:51,407 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 05:56:51,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651955624] [2020-12-22 05:56:51,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:56:51,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 05:56:51,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485287052] [2020-12-22 05:56:51,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 05:56:51,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:56:51,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 05:56:51,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 05:56:51,410 INFO L87 Difference]: Start difference. First operand 8831 states and 16587 transitions. Second operand 7 states. [2020-12-22 05:56:52,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:56:52,778 INFO L93 Difference]: Finished difference Result 28265 states and 53127 transitions. [2020-12-22 05:56:52,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 05:56:52,778 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 55 [2020-12-22 05:56:52,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:56:52,822 INFO L225 Difference]: With dead ends: 28265 [2020-12-22 05:56:52,822 INFO L226 Difference]: Without dead ends: 19461 [2020-12-22 05:56:52,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-12-22 05:56:52,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19461 states. [2020-12-22 05:56:53,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19461 to 8833. [2020-12-22 05:56:53,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8833 states. [2020-12-22 05:56:53,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8833 states to 8833 states and 16588 transitions. [2020-12-22 05:56:53,536 INFO L78 Accepts]: Start accepts. Automaton has 8833 states and 16588 transitions. Word has length 55 [2020-12-22 05:56:53,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:56:53,536 INFO L481 AbstractCegarLoop]: Abstraction has 8833 states and 16588 transitions. [2020-12-22 05:56:53,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 05:56:53,536 INFO L276 IsEmpty]: Start isEmpty. Operand 8833 states and 16588 transitions. [2020-12-22 05:56:53,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 05:56:53,539 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:56:53,539 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:56:53,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 05:56:53,540 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 05:56:53,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:56:53,540 INFO L82 PathProgramCache]: Analyzing trace with hash 709591484, now seen corresponding path program 1 times [2020-12-22 05:56:53,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:56:53,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740187367] [2020-12-22 05:56:53,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:56:53,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:56:53,612 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 05:56:53,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740187367] [2020-12-22 05:56:53,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:56:53,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 05:56:53,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905910340] [2020-12-22 05:56:53,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 05:56:53,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:56:53,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 05:56:53,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 05:56:53,615 INFO L87 Difference]: Start difference. First operand 8833 states and 16588 transitions. Second operand 4 states. [2020-12-22 05:56:59,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:56:59,807 INFO L93 Difference]: Finished difference Result 24058 states and 45177 transitions. [2020-12-22 05:56:59,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 05:56:59,807 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2020-12-22 05:56:59,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:56:59,833 INFO L225 Difference]: With dead ends: 24058 [2020-12-22 05:56:59,833 INFO L226 Difference]: Without dead ends: 15258 [2020-12-22 05:56:59,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:56:59,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15258 states. [2020-12-22 05:57:00,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15258 to 8833. [2020-12-22 05:57:00,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8833 states. [2020-12-22 05:57:00,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8833 states to 8833 states and 16183 transitions. [2020-12-22 05:57:00,283 INFO L78 Accepts]: Start accepts. Automaton has 8833 states and 16183 transitions. Word has length 56 [2020-12-22 05:57:00,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:57:00,284 INFO L481 AbstractCegarLoop]: Abstraction has 8833 states and 16183 transitions. [2020-12-22 05:57:00,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 05:57:00,284 INFO L276 IsEmpty]: Start isEmpty. Operand 8833 states and 16183 transitions. [2020-12-22 05:57:00,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 05:57:00,294 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:57:00,294 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] [2020-12-22 05:57:00,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 05:57:00,295 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 05:57:00,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:57:00,295 INFO L82 PathProgramCache]: Analyzing trace with hash -988207610, now seen corresponding path program 1 times [2020-12-22 05:57:00,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:57:00,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117933831] [2020-12-22 05:57:00,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:57:00,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:57:00,542 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 05:57:00,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117933831] [2020-12-22 05:57:00,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:57:00,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 05:57:00,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763856004] [2020-12-22 05:57:00,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:57:00,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:57:00,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:57:00,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:57:00,544 INFO L87 Difference]: Start difference. First operand 8833 states and 16183 transitions. Second operand 6 states. [2020-12-22 05:57:15,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:57:15,011 INFO L93 Difference]: Finished difference Result 65729 states and 122196 transitions. [2020-12-22 05:57:15,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 05:57:15,012 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 68 [2020-12-22 05:57:15,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:57:15,096 INFO L225 Difference]: With dead ends: 65729 [2020-12-22 05:57:15,096 INFO L226 Difference]: Without dead ends: 56956 [2020-12-22 05:57:15,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2020-12-22 05:57:15,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56956 states. [2020-12-22 05:57:16,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56956 to 17499. [2020-12-22 05:57:16,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17499 states. [2020-12-22 05:57:16,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17499 states to 17499 states and 32100 transitions. [2020-12-22 05:57:16,249 INFO L78 Accepts]: Start accepts. Automaton has 17499 states and 32100 transitions. Word has length 68 [2020-12-22 05:57:16,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:57:16,250 INFO L481 AbstractCegarLoop]: Abstraction has 17499 states and 32100 transitions. [2020-12-22 05:57:16,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 05:57:16,250 INFO L276 IsEmpty]: Start isEmpty. Operand 17499 states and 32100 transitions. [2020-12-22 05:57:16,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 05:57:16,256 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:57:16,257 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:57:16,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 05:57:16,257 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 05:57:16,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:57:16,257 INFO L82 PathProgramCache]: Analyzing trace with hash 720011917, now seen corresponding path program 1 times [2020-12-22 05:57:16,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:57:16,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065488246] [2020-12-22 05:57:16,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:57:16,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:57:16,327 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 05:57:16,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065488246] [2020-12-22 05:57:16,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:57:16,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 05:57:16,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585896281] [2020-12-22 05:57:16,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 05:57:16,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:57:16,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 05:57:16,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 05:57:16,330 INFO L87 Difference]: Start difference. First operand 17499 states and 32100 transitions. Second operand 3 states. [2020-12-22 05:57:17,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:57:17,208 INFO L93 Difference]: Finished difference Result 33923 states and 61906 transitions. [2020-12-22 05:57:17,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 05:57:17,209 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2020-12-22 05:57:17,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:57:17,234 INFO L225 Difference]: With dead ends: 33923 [2020-12-22 05:57:17,234 INFO L226 Difference]: Without dead ends: 18253 [2020-12-22 05:57:17,253 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 05:57:17,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18253 states. [2020-12-22 05:57:18,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18253 to 18243. [2020-12-22 05:57:18,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18243 states. [2020-12-22 05:57:18,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18243 states to 18243 states and 33216 transitions. [2020-12-22 05:57:18,070 INFO L78 Accepts]: Start accepts. Automaton has 18243 states and 33216 transitions. Word has length 71 [2020-12-22 05:57:18,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:57:18,070 INFO L481 AbstractCegarLoop]: Abstraction has 18243 states and 33216 transitions. [2020-12-22 05:57:18,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 05:57:18,071 INFO L276 IsEmpty]: Start isEmpty. Operand 18243 states and 33216 transitions. [2020-12-22 05:57:18,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 05:57:18,076 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:57:18,076 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 05:57:18,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 05:57:18,076 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 05:57:18,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:57:18,077 INFO L82 PathProgramCache]: Analyzing trace with hash 18412043, now seen corresponding path program 1 times [2020-12-22 05:57:18,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:57:18,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089320207] [2020-12-22 05:57:18,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:57:18,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:57:18,306 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 05:57:18,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089320207] [2020-12-22 05:57:18,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:57:18,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 05:57:18,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924639200] [2020-12-22 05:57:18,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:57:18,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:57:18,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:57:18,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:57:18,309 INFO L87 Difference]: Start difference. First operand 18243 states and 33216 transitions. Second operand 6 states. [2020-12-22 05:57:30,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:57:30,201 INFO L93 Difference]: Finished difference Result 68183 states and 126316 transitions. [2020-12-22 05:57:30,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 05:57:30,202 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-12-22 05:57:30,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:57:30,281 INFO L225 Difference]: With dead ends: 68183 [2020-12-22 05:57:30,282 INFO L226 Difference]: Without dead ends: 56790 [2020-12-22 05:57:30,309 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2020-12-22 05:57:30,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56790 states. [2020-12-22 05:57:31,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56790 to 18233. [2020-12-22 05:57:31,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18233 states. [2020-12-22 05:57:31,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18233 states to 18233 states and 33196 transitions. [2020-12-22 05:57:31,301 INFO L78 Accepts]: Start accepts. Automaton has 18233 states and 33196 transitions. Word has length 71 [2020-12-22 05:57:31,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:57:31,301 INFO L481 AbstractCegarLoop]: Abstraction has 18233 states and 33196 transitions. [2020-12-22 05:57:31,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 05:57:31,301 INFO L276 IsEmpty]: Start isEmpty. Operand 18233 states and 33196 transitions. [2020-12-22 05:57:31,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 05:57:31,306 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:57:31,306 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 05:57:31,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 05:57:31,307 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 05:57:31,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:57:31,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1894409564, now seen corresponding path program 1 times [2020-12-22 05:57:31,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:57:31,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667217561] [2020-12-22 05:57:31,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:57:31,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:57:31,365 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 05:57:31,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667217561] [2020-12-22 05:57:31,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:57:31,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 05:57:31,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924876562] [2020-12-22 05:57:31,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 05:57:31,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:57:31,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 05:57:31,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:57:31,368 INFO L87 Difference]: Start difference. First operand 18233 states and 33196 transitions. Second operand 5 states. [2020-12-22 05:57:32,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:57:32,844 INFO L93 Difference]: Finished difference Result 41843 states and 76186 transitions. [2020-12-22 05:57:32,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 05:57:32,845 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 71 [2020-12-22 05:57:32,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:57:32,932 INFO L225 Difference]: With dead ends: 41843 [2020-12-22 05:57:32,932 INFO L226 Difference]: Without dead ends: 23634 [2020-12-22 05:57:32,942 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 05:57:32,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23634 states. [2020-12-22 05:57:33,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23634 to 12744. [2020-12-22 05:57:33,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12744 states. [2020-12-22 05:57:33,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12744 states to 12744 states and 23188 transitions. [2020-12-22 05:57:33,524 INFO L78 Accepts]: Start accepts. Automaton has 12744 states and 23188 transitions. Word has length 71 [2020-12-22 05:57:33,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:57:33,524 INFO L481 AbstractCegarLoop]: Abstraction has 12744 states and 23188 transitions. [2020-12-22 05:57:33,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 05:57:33,524 INFO L276 IsEmpty]: Start isEmpty. Operand 12744 states and 23188 transitions. [2020-12-22 05:57:33,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 05:57:33,527 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:57:33,527 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:57:33,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 05:57:33,527 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 05:57:33,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:57:33,528 INFO L82 PathProgramCache]: Analyzing trace with hash -686757607, now seen corresponding path program 1 times [2020-12-22 05:57:33,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:57:33,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526258112] [2020-12-22 05:57:33,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:57:33,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:57:33,592 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 05:57:33,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526258112] [2020-12-22 05:57:33,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:57:33,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 05:57:33,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911203915] [2020-12-22 05:57:33,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 05:57:33,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:57:33,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 05:57:33,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 05:57:33,594 INFO L87 Difference]: Start difference. First operand 12744 states and 23188 transitions. Second operand 3 states. [2020-12-22 05:57:35,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:57:35,122 INFO L93 Difference]: Finished difference Result 35877 states and 65318 transitions. [2020-12-22 05:57:35,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 05:57:35,122 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 05:57:35,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:57:35,148 INFO L225 Difference]: With dead ends: 35877 [2020-12-22 05:57:35,149 INFO L226 Difference]: Without dead ends: 24109 [2020-12-22 05:57:35,156 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 05:57:35,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24109 states. [2020-12-22 05:57:36,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24109 to 24099. [2020-12-22 05:57:36,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24099 states. [2020-12-22 05:57:36,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24099 states to 24099 states and 43811 transitions. [2020-12-22 05:57:36,098 INFO L78 Accepts]: Start accepts. Automaton has 24099 states and 43811 transitions. Word has length 77 [2020-12-22 05:57:36,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:57:36,098 INFO L481 AbstractCegarLoop]: Abstraction has 24099 states and 43811 transitions. [2020-12-22 05:57:36,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 05:57:36,098 INFO L276 IsEmpty]: Start isEmpty. Operand 24099 states and 43811 transitions. [2020-12-22 05:57:36,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 05:57:36,102 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:57:36,102 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:57:36,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 05:57:36,103 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 05:57:36,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:57:36,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1037089635, now seen corresponding path program 1 times [2020-12-22 05:57:36,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:57:36,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469481495] [2020-12-22 05:57:36,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:57:36,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:57:36,171 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 05:57:36,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469481495] [2020-12-22 05:57:36,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:57:36,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 05:57:36,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506174345] [2020-12-22 05:57:36,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 05:57:36,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:57:36,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 05:57:36,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 05:57:36,173 INFO L87 Difference]: Start difference. First operand 24099 states and 43811 transitions. Second operand 3 states. [2020-12-22 05:57:38,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:57:38,670 INFO L93 Difference]: Finished difference Result 68591 states and 124692 transitions. [2020-12-22 05:57:38,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 05:57:38,670 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 78 [2020-12-22 05:57:38,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:57:38,735 INFO L225 Difference]: With dead ends: 68591 [2020-12-22 05:57:38,735 INFO L226 Difference]: Without dead ends: 46755 [2020-12-22 05:57:38,756 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 05:57:38,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46755 states. [2020-12-22 05:57:40,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46755 to 46745. [2020-12-22 05:57:40,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46745 states. [2020-12-22 05:57:40,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46745 states to 46745 states and 84876 transitions. [2020-12-22 05:57:40,830 INFO L78 Accepts]: Start accepts. Automaton has 46745 states and 84876 transitions. Word has length 78 [2020-12-22 05:57:40,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:57:40,830 INFO L481 AbstractCegarLoop]: Abstraction has 46745 states and 84876 transitions. [2020-12-22 05:57:40,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 05:57:40,830 INFO L276 IsEmpty]: Start isEmpty. Operand 46745 states and 84876 transitions. [2020-12-22 05:57:40,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 05:57:40,833 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:57:40,833 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:57:40,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 05:57:40,834 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 05:57:40,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:57:40,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1500622174, now seen corresponding path program 1 times [2020-12-22 05:57:40,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:57:40,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688070697] [2020-12-22 05:57:40,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:57:40,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:57:40,896 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 05:57:40,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688070697] [2020-12-22 05:57:40,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:57:40,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 05:57:40,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421192716] [2020-12-22 05:57:40,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 05:57:40,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:57:40,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 05:57:40,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 05:57:40,898 INFO L87 Difference]: Start difference. First operand 46745 states and 84876 transitions. Second operand 3 states. [2020-12-22 05:57:45,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:57:45,380 INFO L93 Difference]: Finished difference Result 133782 states and 242809 transitions. [2020-12-22 05:57:45,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 05:57:45,380 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 05:57:45,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:57:45,523 INFO L225 Difference]: With dead ends: 133782 [2020-12-22 05:57:45,523 INFO L226 Difference]: Without dead ends: 91875 [2020-12-22 05:57:45,568 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 05:57:45,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91875 states. [2020-12-22 05:57:49,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91875 to 91865. [2020-12-22 05:57:49,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91865 states. [2020-12-22 05:57:49,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91865 states to 91865 states and 166546 transitions. [2020-12-22 05:57:49,762 INFO L78 Accepts]: Start accepts. Automaton has 91865 states and 166546 transitions. Word has length 79 [2020-12-22 05:57:49,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:57:49,762 INFO L481 AbstractCegarLoop]: Abstraction has 91865 states and 166546 transitions. [2020-12-22 05:57:49,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 05:57:49,762 INFO L276 IsEmpty]: Start isEmpty. Operand 91865 states and 166546 transitions. [2020-12-22 05:57:49,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 05:57:49,765 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:57:49,766 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:57:49,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 05:57:49,766 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 05:57:49,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:57:49,766 INFO L82 PathProgramCache]: Analyzing trace with hash -921587582, now seen corresponding path program 1 times [2020-12-22 05:57:49,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:57:49,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125013437] [2020-12-22 05:57:49,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:57:49,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:57:49,833 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 05:57:49,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125013437] [2020-12-22 05:57:49,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:57:49,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 05:57:49,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032923976] [2020-12-22 05:57:49,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 05:57:49,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:57:49,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 05:57:49,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 05:57:49,835 INFO L87 Difference]: Start difference. First operand 91865 states and 166546 transitions. Second operand 3 states. [2020-12-22 05:57:58,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:57:58,282 INFO L93 Difference]: Finished difference Result 263603 states and 477581 transitions. [2020-12-22 05:57:58,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 05:57:58,283 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-12-22 05:57:58,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:57:58,647 INFO L225 Difference]: With dead ends: 263603 [2020-12-22 05:57:58,647 INFO L226 Difference]: Without dead ends: 181727 [2020-12-22 05:57:58,915 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 05:57:59,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181727 states. [2020-12-22 05:58:06,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181727 to 181717. [2020-12-22 05:58:06,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181717 states. [2020-12-22 05:58:07,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181717 states to 181717 states and 328868 transitions. [2020-12-22 05:58:07,346 INFO L78 Accepts]: Start accepts. Automaton has 181717 states and 328868 transitions. Word has length 80 [2020-12-22 05:58:07,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:58:07,346 INFO L481 AbstractCegarLoop]: Abstraction has 181717 states and 328868 transitions. [2020-12-22 05:58:07,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 05:58:07,347 INFO L276 IsEmpty]: Start isEmpty. Operand 181717 states and 328868 transitions. [2020-12-22 05:58:07,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 05:58:07,350 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:58:07,350 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:58:07,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 05:58:07,351 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 05:58:07,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:58:07,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1812424099, now seen corresponding path program 1 times [2020-12-22 05:58:07,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:58:07,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829270421] [2020-12-22 05:58:07,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:58:07,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:58:07,419 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 05:58:07,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829270421] [2020-12-22 05:58:07,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:58:07,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 05:58:07,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266377854] [2020-12-22 05:58:07,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 05:58:07,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:58:07,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 05:58:07,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 05:58:07,421 INFO L87 Difference]: Start difference. First operand 181717 states and 328868 transitions. Second operand 3 states. [2020-12-22 05:58:22,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:58:22,467 INFO L93 Difference]: Finished difference Result 522036 states and 943981 transitions. [2020-12-22 05:58:22,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 05:58:22,468 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 05:58:22,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:58:23,181 INFO L225 Difference]: With dead ends: 522036 [2020-12-22 05:58:23,181 INFO L226 Difference]: Without dead ends: 360611 [2020-12-22 05:58:23,328 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 05:58:23,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360611 states. [2020-12-22 05:58:42,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360611 to 360601. [2020-12-22 05:58:42,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360601 states. [2020-12-22 05:58:44,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360601 states to 360601 states and 651358 transitions. [2020-12-22 05:58:44,184 INFO L78 Accepts]: Start accepts. Automaton has 360601 states and 651358 transitions. Word has length 81 [2020-12-22 05:58:44,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:58:44,184 INFO L481 AbstractCegarLoop]: Abstraction has 360601 states and 651358 transitions. [2020-12-22 05:58:44,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 05:58:44,184 INFO L276 IsEmpty]: Start isEmpty. Operand 360601 states and 651358 transitions. [2020-12-22 05:58:44,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 05:58:44,201 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:58:44,202 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:58:44,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 05:58:44,202 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 05:58:44,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:58:44,203 INFO L82 PathProgramCache]: Analyzing trace with hash -559315163, now seen corresponding path program 1 times [2020-12-22 05:58:44,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:58:44,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898594263] [2020-12-22 05:58:44,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:58:44,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:58:44,321 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 05:58:44,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898594263] [2020-12-22 05:58:44,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:58:44,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 05:58:44,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659754147] [2020-12-22 05:58:44,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:58:44,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:58:44,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:58:44,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:58:44,325 INFO L87 Difference]: Start difference. First operand 360601 states and 651358 transitions. Second operand 6 states.