/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/product-lines/elevator_spec2_product26.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 06:06:29,149 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 06:06:29,152 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 06:06:29,205 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 06:06:29,206 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 06:06:29,211 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 06:06:29,214 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 06:06:29,223 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 06:06:29,226 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 06:06:29,233 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 06:06:29,234 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 06:06:29,236 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 06:06:29,236 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 06:06:29,240 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 06:06:29,242 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 06:06:29,244 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 06:06:29,245 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 06:06:29,248 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 06:06:29,256 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 06:06:29,264 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 06:06:29,266 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 06:06:29,268 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 06:06:29,270 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 06:06:29,272 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 06:06:29,290 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 06:06:29,296 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 06:06:29,297 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 06:06:29,298 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 06:06:29,299 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 06:06:29,300 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 06:06:29,301 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 06:06:29,301 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 06:06:29,302 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 06:06:29,302 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 06:06:29,303 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 06:06:29,304 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 06:06:29,305 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 06:06:29,331 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 06:06:29,332 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 06:06:29,333 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 06:06:29,333 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 06:06:29,334 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 06:06:29,334 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 06:06:29,334 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 06:06:29,335 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 06:06:29,335 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 06:06:29,335 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 06:06:29,335 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 06:06:29,336 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 06:06:29,336 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 06:06:29,336 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 06:06:29,336 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 06:06:29,337 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 06:06:29,337 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 06:06:29,337 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 06:06:29,337 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 06:06:29,338 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 06:06:29,338 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 06:06:29,338 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 06:06:29,338 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 06:06:29,339 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 06:06:29,339 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 06:06:29,339 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 06:06:29,706 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 06:06:29,739 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 06:06:29,742 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 06:06:29,743 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 06:06:29,746 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 06:06:29,747 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec2_product26.cil.c [2020-12-22 06:06:29,836 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12c6d9eed/53542b6f27e242da82e2d80aea39f70d/FLAGf7651bc6f [2020-12-22 06:06:30,634 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 06:06:30,635 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec2_product26.cil.c [2020-12-22 06:06:30,683 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12c6d9eed/53542b6f27e242da82e2d80aea39f70d/FLAGf7651bc6f [2020-12-22 06:06:30,838 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12c6d9eed/53542b6f27e242da82e2d80aea39f70d [2020-12-22 06:06:30,846 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 06:06:30,848 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 06:06:30,855 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 06:06:30,856 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 06:06:30,863 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 06:06:30,863 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:06:30" (1/1) ... [2020-12-22 06:06:30,865 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14fba4c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:06:30, skipping insertion in model container [2020-12-22 06:06:30,865 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:06:30" (1/1) ... [2020-12-22 06:06:30,874 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 06:06:30,945 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 06:06:31,544 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec2_product26.cil.c[69974,69987] [2020-12-22 06:06:31,557 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:06:31,575 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 06:06:31,850 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec2_product26.cil.c[69974,69987] [2020-12-22 06:06:31,854 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:06:31,951 INFO L208 MainTranslator]: Completed translation [2020-12-22 06:06:31,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:06:31 WrapperNode [2020-12-22 06:06:31,952 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 06:06:31,954 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 06:06:31,955 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 06:06:31,956 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 06:06:31,965 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:06:31" (1/1) ... [2020-12-22 06:06:32,042 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:06:31" (1/1) ... [2020-12-22 06:06:32,357 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 06:06:32,358 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 06:06:32,358 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 06:06:32,358 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 06:06:32,369 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:06:31" (1/1) ... [2020-12-22 06:06:32,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:06:31" (1/1) ... [2020-12-22 06:06:32,401 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:06:31" (1/1) ... [2020-12-22 06:06:32,401 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:06:31" (1/1) ... [2020-12-22 06:06:32,615 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:06:31" (1/1) ... [2020-12-22 06:06:32,788 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:06:31" (1/1) ... [2020-12-22 06:06:32,816 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:06:31" (1/1) ... [2020-12-22 06:06:32,858 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 06:06:32,860 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 06:06:32,860 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 06:06:32,860 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 06:06:32,861 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:06:31" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 06:06:32,983 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 06:06:32,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 06:06:32,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 06:06:32,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 06:06:43,298 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 06:06:43,299 INFO L299 CfgBuilder]: Removed 1125 assume(true) statements. [2020-12-22 06:06:43,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:06:43 BoogieIcfgContainer [2020-12-22 06:06:43,306 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 06:06:43,308 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 06:06:43,309 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 06:06:43,313 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 06:06:43,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 06:06:30" (1/3) ... [2020-12-22 06:06:43,314 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@901106b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:06:43, skipping insertion in model container [2020-12-22 06:06:43,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:06:31" (2/3) ... [2020-12-22 06:06:43,315 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@901106b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:06:43, skipping insertion in model container [2020-12-22 06:06:43,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:06:43" (3/3) ... [2020-12-22 06:06:43,317 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product26.cil.c [2020-12-22 06:06:43,324 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 06:06:43,333 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-12-22 06:06:43,357 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-12-22 06:06:43,422 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 06:06:43,422 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 06:06:43,422 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 06:06:43,422 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 06:06:43,422 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 06:06:43,422 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 06:06:43,423 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 06:06:43,423 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 06:06:43,514 INFO L276 IsEmpty]: Start isEmpty. Operand 4860 states. [2020-12-22 06:06:43,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 06:06:43,535 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:06:43,536 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:06:43,537 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:06:43,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:06:43,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1694776345, now seen corresponding path program 1 times [2020-12-22 06:06:43,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:06:43,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512959624] [2020-12-22 06:06:43,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:06:43,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:06:44,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:06:44,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512959624] [2020-12-22 06:06:44,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:06:44,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:06:44,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88651984] [2020-12-22 06:06:44,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:06:44,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:06:44,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:06:44,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:06:44,114 INFO L87 Difference]: Start difference. First operand 4860 states. Second operand 3 states. [2020-12-22 06:06:44,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:06:44,422 INFO L93 Difference]: Finished difference Result 9711 states and 18369 transitions. [2020-12-22 06:06:44,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:06:44,424 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-12-22 06:06:44,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:06:44,478 INFO L225 Difference]: With dead ends: 9711 [2020-12-22 06:06:44,478 INFO L226 Difference]: Without dead ends: 4856 [2020-12-22 06:06:44,503 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:06:44,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4856 states. [2020-12-22 06:06:44,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4856 to 4856. [2020-12-22 06:06:44,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4856 states. [2020-12-22 06:06:44,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4856 states to 4856 states and 9175 transitions. [2020-12-22 06:06:44,747 INFO L78 Accepts]: Start accepts. Automaton has 4856 states and 9175 transitions. Word has length 27 [2020-12-22 06:06:44,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:06:44,748 INFO L481 AbstractCegarLoop]: Abstraction has 4856 states and 9175 transitions. [2020-12-22 06:06:44,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:06:44,748 INFO L276 IsEmpty]: Start isEmpty. Operand 4856 states and 9175 transitions. [2020-12-22 06:06:44,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 06:06:44,752 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:06:44,753 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:06:44,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 06:06:44,753 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:06:44,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:06:44,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1747198523, now seen corresponding path program 1 times [2020-12-22 06:06:44,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:06:44,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037736161] [2020-12-22 06:06:44,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:06:44,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:06:44,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:06:44,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037736161] [2020-12-22 06:06:44,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:06:44,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 06:06:44,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327075357] [2020-12-22 06:06:44,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:06:44,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:06:44,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:06:44,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:06:44,877 INFO L87 Difference]: Start difference. First operand 4856 states and 9175 transitions. Second operand 6 states. [2020-12-22 06:06:45,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:06:45,450 INFO L93 Difference]: Finished difference Result 9663 states and 18266 transitions. [2020-12-22 06:06:45,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:06:45,451 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2020-12-22 06:06:45,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:06:45,482 INFO L225 Difference]: With dead ends: 9663 [2020-12-22 06:06:45,482 INFO L226 Difference]: Without dead ends: 4850 [2020-12-22 06:06:45,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-22 06:06:45,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4850 states. [2020-12-22 06:06:45,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4850 to 4850. [2020-12-22 06:06:45,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4850 states. [2020-12-22 06:06:45,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4850 states to 4850 states and 9162 transitions. [2020-12-22 06:06:45,724 INFO L78 Accepts]: Start accepts. Automaton has 4850 states and 9162 transitions. Word has length 34 [2020-12-22 06:06:45,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:06:45,725 INFO L481 AbstractCegarLoop]: Abstraction has 4850 states and 9162 transitions. [2020-12-22 06:06:45,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 06:06:45,725 INFO L276 IsEmpty]: Start isEmpty. Operand 4850 states and 9162 transitions. [2020-12-22 06:06:45,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-22 06:06:45,728 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:06:45,729 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:06:45,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 06:06:45,731 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:06:45,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:06:45,734 INFO L82 PathProgramCache]: Analyzing trace with hash -706375709, now seen corresponding path program 1 times [2020-12-22 06:06:45,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:06:45,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525342460] [2020-12-22 06:06:45,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:06:45,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:06:45,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:06:45,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525342460] [2020-12-22 06:06:45,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:06:45,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:06:45,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260039134] [2020-12-22 06:06:45,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:06:45,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:06:45,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:06:45,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:06:45,901 INFO L87 Difference]: Start difference. First operand 4850 states and 9162 transitions. Second operand 4 states. [2020-12-22 06:06:46,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:06:46,271 INFO L93 Difference]: Finished difference Result 9657 states and 18253 transitions. [2020-12-22 06:06:46,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:06:46,272 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-12-22 06:06:46,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:06:46,302 INFO L225 Difference]: With dead ends: 9657 [2020-12-22 06:06:46,303 INFO L226 Difference]: Without dead ends: 4850 [2020-12-22 06:06:46,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:06:46,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4850 states. [2020-12-22 06:06:46,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4850 to 4850. [2020-12-22 06:06:46,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4850 states. [2020-12-22 06:06:46,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4850 states to 4850 states and 9158 transitions. [2020-12-22 06:06:46,526 INFO L78 Accepts]: Start accepts. Automaton has 4850 states and 9158 transitions. Word has length 35 [2020-12-22 06:06:46,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:06:46,534 INFO L481 AbstractCegarLoop]: Abstraction has 4850 states and 9158 transitions. [2020-12-22 06:06:46,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:06:46,535 INFO L276 IsEmpty]: Start isEmpty. Operand 4850 states and 9158 transitions. [2020-12-22 06:06:46,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-22 06:06:46,539 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:06:46,539 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] [2020-12-22 06:06:46,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 06:06:46,540 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:06:46,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:06:46,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1323995352, now seen corresponding path program 1 times [2020-12-22 06:06:46,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:06:46,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646563930] [2020-12-22 06:06:46,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:06:46,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:06:46,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:06:46,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646563930] [2020-12-22 06:06:46,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:06:46,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:06:46,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767865296] [2020-12-22 06:06:46,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:06:46,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:06:46,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:06:46,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:06:46,641 INFO L87 Difference]: Start difference. First operand 4850 states and 9158 transitions. Second operand 4 states. [2020-12-22 06:06:46,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:06:46,949 INFO L93 Difference]: Finished difference Result 9657 states and 18249 transitions. [2020-12-22 06:06:46,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:06:46,950 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2020-12-22 06:06:46,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:06:46,978 INFO L225 Difference]: With dead ends: 9657 [2020-12-22 06:06:46,979 INFO L226 Difference]: Without dead ends: 4850 [2020-12-22 06:06:46,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:06:47,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4850 states. [2020-12-22 06:06:47,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4850 to 4850. [2020-12-22 06:06:47,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4850 states. [2020-12-22 06:06:47,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4850 states to 4850 states and 9154 transitions. [2020-12-22 06:06:47,176 INFO L78 Accepts]: Start accepts. Automaton has 4850 states and 9154 transitions. Word has length 36 [2020-12-22 06:06:47,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:06:47,176 INFO L481 AbstractCegarLoop]: Abstraction has 4850 states and 9154 transitions. [2020-12-22 06:06:47,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:06:47,176 INFO L276 IsEmpty]: Start isEmpty. Operand 4850 states and 9154 transitions. [2020-12-22 06:06:47,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 06:06:47,178 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:06:47,179 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:06:47,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 06:06:47,182 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:06:47,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:06:47,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1077240136, now seen corresponding path program 1 times [2020-12-22 06:06:47,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:06:47,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281849079] [2020-12-22 06:06:47,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:06:47,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:06:47,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:06:47,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281849079] [2020-12-22 06:06:47,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:06:47,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:06:47,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740790002] [2020-12-22 06:06:47,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:06:47,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:06:47,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:06:47,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:06:47,380 INFO L87 Difference]: Start difference. First operand 4850 states and 9154 transitions. Second operand 4 states. [2020-12-22 06:06:47,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:06:47,639 INFO L93 Difference]: Finished difference Result 9657 states and 18245 transitions. [2020-12-22 06:06:47,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:06:47,640 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2020-12-22 06:06:47,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:06:47,667 INFO L225 Difference]: With dead ends: 9657 [2020-12-22 06:06:47,667 INFO L226 Difference]: Without dead ends: 4850 [2020-12-22 06:06:47,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:06:47,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4850 states. [2020-12-22 06:06:47,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4850 to 4850. [2020-12-22 06:06:47,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4850 states. [2020-12-22 06:06:47,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4850 states to 4850 states and 9150 transitions. [2020-12-22 06:06:47,846 INFO L78 Accepts]: Start accepts. Automaton has 4850 states and 9150 transitions. Word has length 37 [2020-12-22 06:06:47,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:06:47,846 INFO L481 AbstractCegarLoop]: Abstraction has 4850 states and 9150 transitions. [2020-12-22 06:06:47,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:06:47,847 INFO L276 IsEmpty]: Start isEmpty. Operand 4850 states and 9150 transitions. [2020-12-22 06:06:47,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 06:06:47,848 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:06:47,849 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:06:47,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 06:06:47,849 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:06:47,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:06:47,850 INFO L82 PathProgramCache]: Analyzing trace with hash -2014364216, now seen corresponding path program 1 times [2020-12-22 06:06:47,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:06:47,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438484757] [2020-12-22 06:06:47,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:06:47,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:06:47,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:06:47,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438484757] [2020-12-22 06:06:47,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:06:47,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:06:47,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674888373] [2020-12-22 06:06:47,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:06:47,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:06:47,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:06:47,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:06:47,921 INFO L87 Difference]: Start difference. First operand 4850 states and 9150 transitions. Second operand 4 states. [2020-12-22 06:06:48,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:06:48,127 INFO L93 Difference]: Finished difference Result 9657 states and 18241 transitions. [2020-12-22 06:06:48,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:06:48,128 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2020-12-22 06:06:48,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:06:48,157 INFO L225 Difference]: With dead ends: 9657 [2020-12-22 06:06:48,157 INFO L226 Difference]: Without dead ends: 4829 [2020-12-22 06:06:48,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:06:48,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4829 states. [2020-12-22 06:06:48,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4829 to 4829. [2020-12-22 06:06:48,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4829 states. [2020-12-22 06:06:48,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4829 states to 4829 states and 9116 transitions. [2020-12-22 06:06:48,346 INFO L78 Accepts]: Start accepts. Automaton has 4829 states and 9116 transitions. Word has length 37 [2020-12-22 06:06:48,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:06:48,347 INFO L481 AbstractCegarLoop]: Abstraction has 4829 states and 9116 transitions. [2020-12-22 06:06:48,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:06:48,347 INFO L276 IsEmpty]: Start isEmpty. Operand 4829 states and 9116 transitions. [2020-12-22 06:06:48,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 06:06:48,348 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:06:48,348 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:06:48,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 06:06:48,349 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:06:48,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:06:48,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1721263123, now seen corresponding path program 1 times [2020-12-22 06:06:48,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:06:48,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941848591] [2020-12-22 06:06:48,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:06:48,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:06:48,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:06:48,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941848591] [2020-12-22 06:06:48,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:06:48,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:06:48,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432862311] [2020-12-22 06:06:48,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:06:48,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:06:48,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:06:48,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:06:48,457 INFO L87 Difference]: Start difference. First operand 4829 states and 9116 transitions. Second operand 4 states. [2020-12-22 06:06:48,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:06:48,690 INFO L93 Difference]: Finished difference Result 9636 states and 18207 transitions. [2020-12-22 06:06:48,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:06:48,690 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2020-12-22 06:06:48,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:06:48,705 INFO L225 Difference]: With dead ends: 9636 [2020-12-22 06:06:48,706 INFO L226 Difference]: Without dead ends: 4829 [2020-12-22 06:06:48,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:06:48,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4829 states. [2020-12-22 06:06:48,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4829 to 4829. [2020-12-22 06:06:48,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4829 states. [2020-12-22 06:06:48,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4829 states to 4829 states and 9115 transitions. [2020-12-22 06:06:48,885 INFO L78 Accepts]: Start accepts. Automaton has 4829 states and 9115 transitions. Word has length 38 [2020-12-22 06:06:48,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:06:48,886 INFO L481 AbstractCegarLoop]: Abstraction has 4829 states and 9115 transitions. [2020-12-22 06:06:48,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:06:48,886 INFO L276 IsEmpty]: Start isEmpty. Operand 4829 states and 9115 transitions. [2020-12-22 06:06:48,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-22 06:06:48,887 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:06:48,888 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:06:48,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 06:06:48,888 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:06:48,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:06:48,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1792057005, now seen corresponding path program 1 times [2020-12-22 06:06:48,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:06:48,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026151760] [2020-12-22 06:06:48,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:06:48,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:06:48,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:06:48,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026151760] [2020-12-22 06:06:48,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:06:48,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:06:48,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270458749] [2020-12-22 06:06:48,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:06:48,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:06:48,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:06:48,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:06:48,956 INFO L87 Difference]: Start difference. First operand 4829 states and 9115 transitions. Second operand 4 states. [2020-12-22 06:06:49,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:06:49,247 INFO L93 Difference]: Finished difference Result 9636 states and 18206 transitions. [2020-12-22 06:06:49,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:06:49,254 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2020-12-22 06:06:49,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:06:49,270 INFO L225 Difference]: With dead ends: 9636 [2020-12-22 06:06:49,271 INFO L226 Difference]: Without dead ends: 4829 [2020-12-22 06:06:49,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:06:49,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4829 states. [2020-12-22 06:06:49,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4829 to 4829. [2020-12-22 06:06:49,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4829 states. [2020-12-22 06:06:49,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4829 states to 4829 states and 9114 transitions. [2020-12-22 06:06:49,446 INFO L78 Accepts]: Start accepts. Automaton has 4829 states and 9114 transitions. Word has length 39 [2020-12-22 06:06:49,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:06:49,446 INFO L481 AbstractCegarLoop]: Abstraction has 4829 states and 9114 transitions. [2020-12-22 06:06:49,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:06:49,447 INFO L276 IsEmpty]: Start isEmpty. Operand 4829 states and 9114 transitions. [2020-12-22 06:06:49,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 06:06:49,448 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:06:49,448 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:06:49,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 06:06:49,449 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:06:49,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:06:49,449 INFO L82 PathProgramCache]: Analyzing trace with hash -891560782, now seen corresponding path program 1 times [2020-12-22 06:06:49,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:06:49,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130178762] [2020-12-22 06:06:49,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:06:49,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:06:49,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:06:49,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130178762] [2020-12-22 06:06:49,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:06:49,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 06:06:49,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054357407] [2020-12-22 06:06:49,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 06:06:49,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:06:49,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 06:06:49,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:06:49,561 INFO L87 Difference]: Start difference. First operand 4829 states and 9114 transitions. Second operand 7 states. [2020-12-22 06:06:49,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:06:49,944 INFO L93 Difference]: Finished difference Result 9630 states and 18194 transitions. [2020-12-22 06:06:49,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 06:06:49,945 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 40 [2020-12-22 06:06:49,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:06:49,964 INFO L225 Difference]: With dead ends: 9630 [2020-12-22 06:06:49,964 INFO L226 Difference]: Without dead ends: 4829 [2020-12-22 06:06:49,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-12-22 06:06:49,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4829 states. [2020-12-22 06:06:50,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4829 to 4829. [2020-12-22 06:06:50,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4829 states. [2020-12-22 06:06:50,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4829 states to 4829 states and 9113 transitions. [2020-12-22 06:06:50,143 INFO L78 Accepts]: Start accepts. Automaton has 4829 states and 9113 transitions. Word has length 40 [2020-12-22 06:06:50,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:06:50,143 INFO L481 AbstractCegarLoop]: Abstraction has 4829 states and 9113 transitions. [2020-12-22 06:06:50,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 06:06:50,143 INFO L276 IsEmpty]: Start isEmpty. Operand 4829 states and 9113 transitions. [2020-12-22 06:06:50,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 06:06:50,145 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:06:50,145 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:06:50,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 06:06:50,145 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:06:50,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:06:50,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1789484258, now seen corresponding path program 1 times [2020-12-22 06:06:50,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:06:50,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488267535] [2020-12-22 06:06:50,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:06:50,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:06:50,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:06:50,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488267535] [2020-12-22 06:06:50,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:06:50,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 06:06:50,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295140652] [2020-12-22 06:06:50,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:06:50,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:06:50,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:06:50,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:06:50,255 INFO L87 Difference]: Start difference. First operand 4829 states and 9113 transitions. Second operand 3 states. [2020-12-22 06:06:50,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:06:50,751 INFO L93 Difference]: Finished difference Result 11241 states and 21255 transitions. [2020-12-22 06:06:50,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:06:50,752 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2020-12-22 06:06:50,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:06:50,780 INFO L225 Difference]: With dead ends: 11241 [2020-12-22 06:06:50,780 INFO L226 Difference]: Without dead ends: 8786 [2020-12-22 06:06:50,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:06:50,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8786 states. [2020-12-22 06:06:51,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8786 to 6687. [2020-12-22 06:06:51,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6687 states. [2020-12-22 06:06:51,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6687 states to 6687 states and 12631 transitions. [2020-12-22 06:06:51,190 INFO L78 Accepts]: Start accepts. Automaton has 6687 states and 12631 transitions. Word has length 41 [2020-12-22 06:06:51,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:06:51,190 INFO L481 AbstractCegarLoop]: Abstraction has 6687 states and 12631 transitions. [2020-12-22 06:06:51,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:06:51,190 INFO L276 IsEmpty]: Start isEmpty. Operand 6687 states and 12631 transitions. [2020-12-22 06:06:51,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 06:06:51,195 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:06:51,195 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, 1, 1] [2020-12-22 06:06:51,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 06:06:51,195 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:06:51,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:06:51,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1006597301, now seen corresponding path program 1 times [2020-12-22 06:06:51,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:06:51,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410413118] [2020-12-22 06:06:51,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:06:51,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:06:51,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:06:51,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410413118] [2020-12-22 06:06:51,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:06:51,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:06:51,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814796436] [2020-12-22 06:06:51,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:06:51,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:06:51,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:06:51,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:06:51,270 INFO L87 Difference]: Start difference. First operand 6687 states and 12631 transitions. Second operand 5 states. [2020-12-22 06:06:51,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:06:51,870 INFO L93 Difference]: Finished difference Result 13227 states and 24820 transitions. [2020-12-22 06:06:51,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 06:06:51,871 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-12-22 06:06:51,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:06:51,894 INFO L225 Difference]: With dead ends: 13227 [2020-12-22 06:06:51,894 INFO L226 Difference]: Without dead ends: 7762 [2020-12-22 06:06:51,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 06:06:51,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7762 states. [2020-12-22 06:06:52,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7762 to 5432. [2020-12-22 06:06:52,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5432 states. [2020-12-22 06:06:52,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5432 states to 5432 states and 10204 transitions. [2020-12-22 06:06:52,171 INFO L78 Accepts]: Start accepts. Automaton has 5432 states and 10204 transitions. Word has length 54 [2020-12-22 06:06:52,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:06:52,171 INFO L481 AbstractCegarLoop]: Abstraction has 5432 states and 10204 transitions. [2020-12-22 06:06:52,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:06:52,171 INFO L276 IsEmpty]: Start isEmpty. Operand 5432 states and 10204 transitions. [2020-12-22 06:06:52,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 06:06:52,174 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:06:52,174 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:06:52,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 06:06:52,174 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:06:52,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:06:52,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1899706606, now seen corresponding path program 1 times [2020-12-22 06:06:52,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:06:52,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745786874] [2020-12-22 06:06:52,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:06:52,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:06:52,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:06:52,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745786874] [2020-12-22 06:06:52,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:06:52,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:06:52,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767581294] [2020-12-22 06:06:52,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:06:52,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:06:52,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:06:52,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:06:52,256 INFO L87 Difference]: Start difference. First operand 5432 states and 10204 transitions. Second operand 5 states. [2020-12-22 06:06:55,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:06:55,244 INFO L93 Difference]: Finished difference Result 21909 states and 41039 transitions. [2020-12-22 06:06:55,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:06:55,244 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 55 [2020-12-22 06:06:55,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:06:55,298 INFO L225 Difference]: With dead ends: 21909 [2020-12-22 06:06:55,298 INFO L226 Difference]: Without dead ends: 16523 [2020-12-22 06:06:55,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 06:06:55,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16523 states. [2020-12-22 06:06:55,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16523 to 5446. [2020-12-22 06:06:55,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5446 states. [2020-12-22 06:06:55,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5446 states to 5446 states and 10218 transitions. [2020-12-22 06:06:55,785 INFO L78 Accepts]: Start accepts. Automaton has 5446 states and 10218 transitions. Word has length 55 [2020-12-22 06:06:55,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:06:55,785 INFO L481 AbstractCegarLoop]: Abstraction has 5446 states and 10218 transitions. [2020-12-22 06:06:55,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:06:55,786 INFO L276 IsEmpty]: Start isEmpty. Operand 5446 states and 10218 transitions. [2020-12-22 06:06:55,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 06:06:55,788 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:06:55,789 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:06:55,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 06:06:55,789 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:06:55,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:06:55,790 INFO L82 PathProgramCache]: Analyzing trace with hash 175354806, now seen corresponding path program 1 times [2020-12-22 06:06:55,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:06:55,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567835966] [2020-12-22 06:06:55,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:06:55,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:06:55,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:06:55,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567835966] [2020-12-22 06:06:55,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:06:55,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:06:55,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767239232] [2020-12-22 06:06:55,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:06:55,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:06:55,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:06:55,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:06:55,883 INFO L87 Difference]: Start difference. First operand 5446 states and 10218 transitions. Second operand 4 states. [2020-12-22 06:06:58,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:06:58,489 INFO L93 Difference]: Finished difference Result 16177 states and 30230 transitions. [2020-12-22 06:06:58,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:06:58,490 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2020-12-22 06:06:58,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:06:58,517 INFO L225 Difference]: With dead ends: 16177 [2020-12-22 06:06:58,517 INFO L226 Difference]: Without dead ends: 10764 [2020-12-22 06:06:58,528 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 06:06:58,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10764 states. [2020-12-22 06:06:58,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10764 to 6952. [2020-12-22 06:06:58,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6952 states. [2020-12-22 06:06:58,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6952 states to 6952 states and 12902 transitions. [2020-12-22 06:06:58,906 INFO L78 Accepts]: Start accepts. Automaton has 6952 states and 12902 transitions. Word has length 56 [2020-12-22 06:06:58,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:06:58,906 INFO L481 AbstractCegarLoop]: Abstraction has 6952 states and 12902 transitions. [2020-12-22 06:06:58,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:06:58,906 INFO L276 IsEmpty]: Start isEmpty. Operand 6952 states and 12902 transitions. [2020-12-22 06:06:58,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 06:06:58,908 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:06:58,908 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:06:58,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 06:06:58,909 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:06:58,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:06:58,909 INFO L82 PathProgramCache]: Analyzing trace with hash 547951710, now seen corresponding path program 1 times [2020-12-22 06:06:58,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:06:58,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74348410] [2020-12-22 06:06:58,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:06:58,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:06:58,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:06:58,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74348410] [2020-12-22 06:06:58,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:06:58,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:06:58,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313790074] [2020-12-22 06:06:58,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:06:58,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:06:58,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:06:58,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:06:58,986 INFO L87 Difference]: Start difference. First operand 6952 states and 12902 transitions. Second operand 5 states. [2020-12-22 06:07:00,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:07:00,704 INFO L93 Difference]: Finished difference Result 46439 states and 86491 transitions. [2020-12-22 06:07:00,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 06:07:00,705 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 58 [2020-12-22 06:07:00,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:07:00,789 INFO L225 Difference]: With dead ends: 46439 [2020-12-22 06:07:00,789 INFO L226 Difference]: Without dead ends: 39529 [2020-12-22 06:07:00,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-22 06:07:00,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39529 states. [2020-12-22 06:07:02,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39529 to 11129. [2020-12-22 06:07:02,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11129 states. [2020-12-22 06:07:02,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11129 states to 11129 states and 20686 transitions. [2020-12-22 06:07:02,116 INFO L78 Accepts]: Start accepts. Automaton has 11129 states and 20686 transitions. Word has length 58 [2020-12-22 06:07:02,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:07:02,116 INFO L481 AbstractCegarLoop]: Abstraction has 11129 states and 20686 transitions. [2020-12-22 06:07:02,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:07:02,117 INFO L276 IsEmpty]: Start isEmpty. Operand 11129 states and 20686 transitions. [2020-12-22 06:07:02,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 06:07:02,119 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:07:02,119 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:07:02,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 06:07:02,119 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:07:02,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:07:02,120 INFO L82 PathProgramCache]: Analyzing trace with hash 413938204, now seen corresponding path program 1 times [2020-12-22 06:07:02,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:07:02,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074130973] [2020-12-22 06:07:02,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:07:02,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:07:02,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:07:02,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074130973] [2020-12-22 06:07:02,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:07:02,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:07:02,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569290529] [2020-12-22 06:07:02,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:07:02,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:07:02,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:07:02,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:07:02,198 INFO L87 Difference]: Start difference. First operand 11129 states and 20686 transitions. Second operand 4 states. [2020-12-22 06:07:03,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:07:03,290 INFO L93 Difference]: Finished difference Result 33636 states and 62537 transitions. [2020-12-22 06:07:03,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:07:03,291 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2020-12-22 06:07:03,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:07:03,345 INFO L225 Difference]: With dead ends: 33636 [2020-12-22 06:07:03,346 INFO L226 Difference]: Without dead ends: 26894 [2020-12-22 06:07:03,362 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 06:07:03,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26894 states. [2020-12-22 06:07:04,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26894 to 17136. [2020-12-22 06:07:04,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17136 states. [2020-12-22 06:07:04,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17136 states to 17136 states and 31848 transitions. [2020-12-22 06:07:04,432 INFO L78 Accepts]: Start accepts. Automaton has 17136 states and 31848 transitions. Word has length 58 [2020-12-22 06:07:04,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:07:04,432 INFO L481 AbstractCegarLoop]: Abstraction has 17136 states and 31848 transitions. [2020-12-22 06:07:04,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:07:04,433 INFO L276 IsEmpty]: Start isEmpty. Operand 17136 states and 31848 transitions. [2020-12-22 06:07:04,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 06:07:04,434 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:07:04,435 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:07:04,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 06:07:04,435 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:07:04,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:07:04,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1610349402, now seen corresponding path program 1 times [2020-12-22 06:07:04,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:07:04,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185407139] [2020-12-22 06:07:04,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:07:04,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:07:04,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:07:04,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185407139] [2020-12-22 06:07:04,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:07:04,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:07:04,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422246475] [2020-12-22 06:07:04,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:07:04,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:07:04,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:07:04,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:07:04,504 INFO L87 Difference]: Start difference. First operand 17136 states and 31848 transitions. Second operand 4 states. [2020-12-22 06:07:05,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:07:05,679 INFO L93 Difference]: Finished difference Result 39742 states and 73788 transitions. [2020-12-22 06:07:05,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:07:05,680 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-12-22 06:07:05,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:07:05,729 INFO L225 Difference]: With dead ends: 39742 [2020-12-22 06:07:05,729 INFO L226 Difference]: Without dead ends: 27240 [2020-12-22 06:07:05,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:07:05,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27240 states. [2020-12-22 06:07:06,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27240 to 17156. [2020-12-22 06:07:06,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17156 states. [2020-12-22 06:07:06,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17156 states to 17156 states and 31856 transitions. [2020-12-22 06:07:06,436 INFO L78 Accepts]: Start accepts. Automaton has 17156 states and 31856 transitions. Word has length 60 [2020-12-22 06:07:06,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:07:06,437 INFO L481 AbstractCegarLoop]: Abstraction has 17156 states and 31856 transitions. [2020-12-22 06:07:06,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:07:06,437 INFO L276 IsEmpty]: Start isEmpty. Operand 17156 states and 31856 transitions. [2020-12-22 06:07:06,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 06:07:06,440 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:07:06,440 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:07:06,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 06:07:06,440 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:07:06,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:07:06,441 INFO L82 PathProgramCache]: Analyzing trace with hash 96023119, now seen corresponding path program 1 times [2020-12-22 06:07:06,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:07:06,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874158208] [2020-12-22 06:07:06,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:07:06,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:07:06,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:07:06,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874158208] [2020-12-22 06:07:06,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:07:06,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 06:07:06,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623937002] [2020-12-22 06:07:06,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 06:07:06,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:07:06,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 06:07:06,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:07:06,527 INFO L87 Difference]: Start difference. First operand 17156 states and 31856 transitions. Second operand 7 states. [2020-12-22 06:07:09,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:07:09,039 INFO L93 Difference]: Finished difference Result 52731 states and 97868 transitions. [2020-12-22 06:07:09,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 06:07:09,040 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-12-22 06:07:09,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:07:09,089 INFO L225 Difference]: With dead ends: 52731 [2020-12-22 06:07:09,090 INFO L226 Difference]: Without dead ends: 39987 [2020-12-22 06:07:09,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-12-22 06:07:09,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39987 states. [2020-12-22 06:07:09,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39987 to 17168. [2020-12-22 06:07:09,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17168 states. [2020-12-22 06:07:09,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17168 states to 17168 states and 31857 transitions. [2020-12-22 06:07:09,920 INFO L78 Accepts]: Start accepts. Automaton has 17168 states and 31857 transitions. Word has length 66 [2020-12-22 06:07:09,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:07:09,921 INFO L481 AbstractCegarLoop]: Abstraction has 17168 states and 31857 transitions. [2020-12-22 06:07:09,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 06:07:09,921 INFO L276 IsEmpty]: Start isEmpty. Operand 17168 states and 31857 transitions. [2020-12-22 06:07:09,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 06:07:09,923 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:07:09,923 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:07:09,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 06:07:09,923 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:07:09,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:07:09,924 INFO L82 PathProgramCache]: Analyzing trace with hash 314877837, now seen corresponding path program 1 times [2020-12-22 06:07:09,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:07:09,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564667105] [2020-12-22 06:07:09,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:07:09,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:07:09,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:07:09,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564667105] [2020-12-22 06:07:09,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:07:09,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:07:09,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785522414] [2020-12-22 06:07:09,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:07:09,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:07:09,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:07:09,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:07:09,997 INFO L87 Difference]: Start difference. First operand 17168 states and 31857 transitions. Second operand 5 states. [2020-12-22 06:07:11,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:07:11,255 INFO L93 Difference]: Finished difference Result 29693 states and 55079 transitions. [2020-12-22 06:07:11,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:07:11,256 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2020-12-22 06:07:11,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:07:11,274 INFO L225 Difference]: With dead ends: 29693 [2020-12-22 06:07:11,275 INFO L226 Difference]: Without dead ends: 17195 [2020-12-22 06:07:11,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:07:11,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17195 states. [2020-12-22 06:07:11,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17195 to 17168. [2020-12-22 06:07:11,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17168 states. [2020-12-22 06:07:12,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17168 states to 17168 states and 31818 transitions. [2020-12-22 06:07:12,032 INFO L78 Accepts]: Start accepts. Automaton has 17168 states and 31818 transitions. Word has length 66 [2020-12-22 06:07:12,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:07:12,032 INFO L481 AbstractCegarLoop]: Abstraction has 17168 states and 31818 transitions. [2020-12-22 06:07:12,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:07:12,032 INFO L276 IsEmpty]: Start isEmpty. Operand 17168 states and 31818 transitions. [2020-12-22 06:07:12,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 06:07:12,035 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:07:12,035 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:07:12,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 06:07:12,036 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:07:12,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:07:12,036 INFO L82 PathProgramCache]: Analyzing trace with hash -271928177, now seen corresponding path program 1 times [2020-12-22 06:07:12,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:07:12,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164799864] [2020-12-22 06:07:12,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:07:12,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:07:12,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:07:12,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164799864] [2020-12-22 06:07:12,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:07:12,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:07:12,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433764360] [2020-12-22 06:07:12,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:07:12,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:07:12,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:07:12,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:07:12,117 INFO L87 Difference]: Start difference. First operand 17168 states and 31818 transitions. Second operand 3 states. [2020-12-22 06:07:13,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:07:13,403 INFO L93 Difference]: Finished difference Result 45514 states and 84496 transitions. [2020-12-22 06:07:13,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:07:13,404 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 06:07:13,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:07:13,445 INFO L225 Difference]: With dead ends: 45514 [2020-12-22 06:07:13,446 INFO L226 Difference]: Without dead ends: 30312 [2020-12-22 06:07:13,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:07:13,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30312 states. [2020-12-22 06:07:14,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30312 to 30312. [2020-12-22 06:07:14,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30312 states. [2020-12-22 06:07:14,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30312 states to 30312 states and 56330 transitions. [2020-12-22 06:07:14,723 INFO L78 Accepts]: Start accepts. Automaton has 30312 states and 56330 transitions. Word has length 66 [2020-12-22 06:07:14,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:07:14,724 INFO L481 AbstractCegarLoop]: Abstraction has 30312 states and 56330 transitions. [2020-12-22 06:07:14,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:07:14,724 INFO L276 IsEmpty]: Start isEmpty. Operand 30312 states and 56330 transitions. [2020-12-22 06:07:14,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 06:07:14,726 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:07:14,726 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 06:07:14,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 06:07:14,727 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:07:14,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:07:14,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1606844311, now seen corresponding path program 1 times [2020-12-22 06:07:14,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:07:14,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352554946] [2020-12-22 06:07:14,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:07:14,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:07:14,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:07:14,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352554946] [2020-12-22 06:07:14,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:07:14,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:07:14,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87520432] [2020-12-22 06:07:14,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:07:14,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:07:14,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:07:14,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:07:14,801 INFO L87 Difference]: Start difference. First operand 30312 states and 56330 transitions. Second operand 3 states. [2020-12-22 06:07:16,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:07:16,898 INFO L93 Difference]: Finished difference Result 83505 states and 155288 transitions. [2020-12-22 06:07:16,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:07:16,899 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2020-12-22 06:07:16,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:07:16,976 INFO L225 Difference]: With dead ends: 83505 [2020-12-22 06:07:16,976 INFO L226 Difference]: Without dead ends: 56374 [2020-12-22 06:07:16,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:07:17,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56374 states. [2020-12-22 06:07:19,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56374 to 56372. [2020-12-22 06:07:19,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56372 states. [2020-12-22 06:07:19,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56372 states to 56372 states and 104916 transitions. [2020-12-22 06:07:19,475 INFO L78 Accepts]: Start accepts. Automaton has 56372 states and 104916 transitions. Word has length 68 [2020-12-22 06:07:19,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:07:19,475 INFO L481 AbstractCegarLoop]: Abstraction has 56372 states and 104916 transitions. [2020-12-22 06:07:19,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:07:19,475 INFO L276 IsEmpty]: Start isEmpty. Operand 56372 states and 104916 transitions. [2020-12-22 06:07:19,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 06:07:19,478 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:07:19,478 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] [2020-12-22 06:07:19,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 06:07:19,479 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:07:19,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:07:19,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1382960168, now seen corresponding path program 1 times [2020-12-22 06:07:19,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:07:19,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505727188] [2020-12-22 06:07:19,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:07:19,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:07:19,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:07:19,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505727188] [2020-12-22 06:07:19,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:07:19,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:07:19,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378038418] [2020-12-22 06:07:19,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:07:19,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:07:19,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:07:19,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:07:19,591 INFO L87 Difference]: Start difference. First operand 56372 states and 104916 transitions. Second operand 3 states. [2020-12-22 06:07:23,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:07:23,730 INFO L93 Difference]: Finished difference Result 158994 states and 295926 transitions. [2020-12-22 06:07:23,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:07:23,731 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 69 [2020-12-22 06:07:23,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:07:23,936 INFO L225 Difference]: With dead ends: 158994 [2020-12-22 06:07:23,936 INFO L226 Difference]: Without dead ends: 108018 [2020-12-22 06:07:23,985 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:07:24,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108018 states. [2020-12-22 06:07:28,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108018 to 108014. [2020-12-22 06:07:28,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108014 states. [2020-12-22 06:07:28,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108014 states to 108014 states and 201168 transitions. [2020-12-22 06:07:28,850 INFO L78 Accepts]: Start accepts. Automaton has 108014 states and 201168 transitions. Word has length 69 [2020-12-22 06:07:28,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:07:28,851 INFO L481 AbstractCegarLoop]: Abstraction has 108014 states and 201168 transitions. [2020-12-22 06:07:28,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:07:28,851 INFO L276 IsEmpty]: Start isEmpty. Operand 108014 states and 201168 transitions. [2020-12-22 06:07:28,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 06:07:28,855 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:07:28,855 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] [2020-12-22 06:07:28,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 06:07:28,855 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:07:28,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:07:28,856 INFO L82 PathProgramCache]: Analyzing trace with hash -77878402, now seen corresponding path program 1 times [2020-12-22 06:07:28,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:07:28,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97424116] [2020-12-22 06:07:28,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:07:28,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:07:28,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:07:28,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97424116] [2020-12-22 06:07:28,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:07:28,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:07:28,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431008281] [2020-12-22 06:07:28,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:07:28,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:07:28,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:07:28,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:07:28,943 INFO L87 Difference]: Start difference. First operand 108014 states and 201168 transitions. Second operand 3 states. [2020-12-22 06:07:37,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:07:37,229 INFO L93 Difference]: Finished difference Result 308943 states and 575224 transitions. [2020-12-22 06:07:37,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:07:37,231 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 70 [2020-12-22 06:07:37,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:07:37,839 INFO L225 Difference]: With dead ends: 308943 [2020-12-22 06:07:37,839 INFO L226 Difference]: Without dead ends: 210326 [2020-12-22 06:07:37,916 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:07:38,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210326 states. [2020-12-22 06:07:46,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210326 to 210320. [2020-12-22 06:07:46,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210320 states. [2020-12-22 06:07:46,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210320 states to 210320 states and 391788 transitions. [2020-12-22 06:07:46,807 INFO L78 Accepts]: Start accepts. Automaton has 210320 states and 391788 transitions. Word has length 70 [2020-12-22 06:07:46,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:07:46,808 INFO L481 AbstractCegarLoop]: Abstraction has 210320 states and 391788 transitions. [2020-12-22 06:07:46,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:07:46,808 INFO L276 IsEmpty]: Start isEmpty. Operand 210320 states and 391788 transitions. [2020-12-22 06:07:46,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 06:07:46,829 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:07:46,829 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:07:46,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 06:07:46,830 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:07:46,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:07:46,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1880766193, now seen corresponding path program 1 times [2020-12-22 06:07:46,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:07:46,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821977188] [2020-12-22 06:07:46,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:07:46,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:07:46,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:07:46,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821977188] [2020-12-22 06:07:46,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:07:46,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:07:46,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300871459] [2020-12-22 06:07:46,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:07:46,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:07:46,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:07:46,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:07:46,911 INFO L87 Difference]: Start difference. First operand 210320 states and 391788 transitions. Second operand 3 states. [2020-12-22 06:08:02,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:08:02,633 INFO L93 Difference]: Finished difference Result 606740 states and 1129777 transitions. [2020-12-22 06:08:02,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:08:02,634 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2020-12-22 06:08:02,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:08:03,559 INFO L225 Difference]: With dead ends: 606740 [2020-12-22 06:08:03,560 INFO L226 Difference]: Without dead ends: 412957 [2020-12-22 06:08:03,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:08:04,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412957 states. [2020-12-22 06:08:20,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412957 to 412949. [2020-12-22 06:08:20,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412949 states. [2020-12-22 06:08:21,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412949 states to 412949 states and 769162 transitions. [2020-12-22 06:08:21,717 INFO L78 Accepts]: Start accepts. Automaton has 412949 states and 769162 transitions. Word has length 71 [2020-12-22 06:08:21,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:08:21,717 INFO L481 AbstractCegarLoop]: Abstraction has 412949 states and 769162 transitions. [2020-12-22 06:08:21,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:08:21,724 INFO L276 IsEmpty]: Start isEmpty. Operand 412949 states and 769162 transitions. [2020-12-22 06:08:21,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-22 06:08:21,763 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:08:21,763 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:08:21,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 06:08:21,765 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:08:21,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:08:21,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1329064901, now seen corresponding path program 1 times [2020-12-22 06:08:21,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:08:21,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112630920] [2020-12-22 06:08:21,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:08:21,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:08:21,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:08:21,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112630920] [2020-12-22 06:08:21,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:08:21,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:08:21,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718525690] [2020-12-22 06:08:21,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:08:21,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:08:21,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:08:21,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:08:21,845 INFO L87 Difference]: Start difference. First operand 412949 states and 769162 transitions. Second operand 4 states. [2020-12-22 06:08:45,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:08:45,536 INFO L93 Difference]: Finished difference Result 908495 states and 1684187 transitions. [2020-12-22 06:08:45,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:08:45,536 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 104 [2020-12-22 06:08:45,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:08:47,022 INFO L225 Difference]: With dead ends: 908495 [2020-12-22 06:08:47,022 INFO L226 Difference]: Without dead ends: 495753 [2020-12-22 06:08:47,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:08:47,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495753 states. [2020-12-22 06:09:05,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495753 to 413861. [2020-12-22 06:09:05,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 413861 states. [2020-12-22 06:09:07,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413861 states to 413861 states and 770074 transitions. [2020-12-22 06:09:07,326 INFO L78 Accepts]: Start accepts. Automaton has 413861 states and 770074 transitions. Word has length 104 [2020-12-22 06:09:07,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:09:07,326 INFO L481 AbstractCegarLoop]: Abstraction has 413861 states and 770074 transitions. [2020-12-22 06:09:07,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:09:07,327 INFO L276 IsEmpty]: Start isEmpty. Operand 413861 states and 770074 transitions. [2020-12-22 06:09:07,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-22 06:09:07,368 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:09:07,368 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:09:07,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 06:09:07,369 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:09:07,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:09:07,369 INFO L82 PathProgramCache]: Analyzing trace with hash -2020536983, now seen corresponding path program 1 times [2020-12-22 06:09:07,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:09:07,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777055011] [2020-12-22 06:09:07,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:09:07,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:09:07,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:09:07,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777055011] [2020-12-22 06:09:07,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:09:07,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:09:07,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334975116] [2020-12-22 06:09:07,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:09:07,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:09:07,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:09:07,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:09:07,439 INFO L87 Difference]: Start difference. First operand 413861 states and 770074 transitions. Second operand 4 states.