/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/combinations/pals_lcr.7.1.ufo.BOUNDED-14.pals+Problem12_label04.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:10:33,369 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:10:33,372 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:10:33,423 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:10:33,424 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:10:33,428 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:10:33,432 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:10:33,439 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:10:33,443 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:10:33,450 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:10:33,452 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:10:33,454 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:10:33,454 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:10:33,457 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:10:33,459 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:10:33,475 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:10:33,476 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:10:33,480 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:10:33,487 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:10:33,494 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:10:33,496 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:10:33,498 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:10:33,500 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:10:33,502 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:10:33,510 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:10:33,522 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:10:33,523 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:10:33,523 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:10:33,529 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:10:33,586 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:10:33,586 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:10:33,590 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:10:33,591 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:10:33,591 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:10:33,591 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:10:33,591 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:10:33,592 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:10:33,592 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:10:33,592 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:10:33,594 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:10:33,594 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:10:33,594 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:10:33,594 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:10:33,594 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:10:33,595 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:10:33,595 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:10:33,595 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:10:33,595 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:10:33,596 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:10:33,596 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:10:33,596 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:10:33,596 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:10:33,597 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:10:33,597 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:10:33,597 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:10:34,005 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:10:34,033 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:10:34,036 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:10:34,038 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:10:34,038 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:10:34,039 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.7.1.ufo.BOUNDED-14.pals+Problem12_label04.c [2020-12-22 10:10:34,115 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4fdc37ce/726af23c8f4e4e6e847aa53be1a08319/FLAGcabffc832 [2020-12-22 10:10:35,118 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:10:35,118 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.7.1.ufo.BOUNDED-14.pals+Problem12_label04.c [2020-12-22 10:10:35,166 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4fdc37ce/726af23c8f4e4e6e847aa53be1a08319/FLAGcabffc832 [2020-12-22 10:10:35,557 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4fdc37ce/726af23c8f4e4e6e847aa53be1a08319 [2020-12-22 10:10:35,560 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:10:35,562 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:10:35,564 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:10:35,564 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:10:35,568 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:10:35,569 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:10:35" (1/1) ... [2020-12-22 10:10:35,570 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e8a432f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:10:35, skipping insertion in model container [2020-12-22 10:10:35,570 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:10:35" (1/1) ... [2020-12-22 10:10:35,579 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:10:35,766 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:10:36,152 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/combinations/pals_lcr.7.1.ufo.BOUNDED-14.pals+Problem12_label04.c[20581,20594] [2020-12-22 10:10:36,268 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/combinations/pals_lcr.7.1.ufo.BOUNDED-14.pals+Problem12_label04.c[27399,27412] [2020-12-22 10:10:37,127 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:10:37,228 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:10:37,308 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/combinations/pals_lcr.7.1.ufo.BOUNDED-14.pals+Problem12_label04.c[20581,20594] [2020-12-22 10:10:37,324 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/combinations/pals_lcr.7.1.ufo.BOUNDED-14.pals+Problem12_label04.c[27399,27412] [2020-12-22 10:10:37,931 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:10:37,981 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:10:37,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:10:37 WrapperNode [2020-12-22 10:10:37,983 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:10:37,985 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:10:37,985 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:10:37,985 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:10:37,994 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:10:37" (1/1) ... [2020-12-22 10:10:38,091 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:10:37" (1/1) ... [2020-12-22 10:10:38,500 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:10:38,501 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:10:38,501 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:10:38,501 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:10:38,514 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:10:37" (1/1) ... [2020-12-22 10:10:38,514 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:10:37" (1/1) ... [2020-12-22 10:10:38,555 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:10:37" (1/1) ... [2020-12-22 10:10:38,556 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:10:37" (1/1) ... [2020-12-22 10:10:38,770 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:10:37" (1/1) ... [2020-12-22 10:10:38,852 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:10:37" (1/1) ... [2020-12-22 10:10:38,897 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:10:37" (1/1) ... [2020-12-22 10:10:38,957 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:10:38,958 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:10:38,958 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:10:38,958 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:10:38,959 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:10:37" (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 10:10:39,068 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:10:39,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:10:39,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:10:39,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:10:44,932 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:10:44,933 INFO L299 CfgBuilder]: Removed 40 assume(true) statements. [2020-12-22 10:10:44,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:10:44 BoogieIcfgContainer [2020-12-22 10:10:44,936 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:10:44,938 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:10:44,938 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:10:44,942 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:10:44,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:10:35" (1/3) ... [2020-12-22 10:10:44,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@331a858 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:10:44, skipping insertion in model container [2020-12-22 10:10:44,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:10:37" (2/3) ... [2020-12-22 10:10:44,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@331a858 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:10:44, skipping insertion in model container [2020-12-22 10:10:44,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:10:44" (3/3) ... [2020-12-22 10:10:44,945 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.1.ufo.BOUNDED-14.pals+Problem12_label04.c [2020-12-22 10:10:44,952 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:10:44,958 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:10:44,978 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:10:45,014 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:10:45,015 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:10:45,015 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:10:45,015 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:10:45,015 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:10:45,015 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:10:45,016 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:10:45,016 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:10:45,055 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states. [2020-12-22 10:10:45,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 10:10:45,066 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:10:45,067 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:10:45,068 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:10:45,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:10:45,075 INFO L82 PathProgramCache]: Analyzing trace with hash 720070723, now seen corresponding path program 1 times [2020-12-22 10:10:45,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:10:45,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567022708] [2020-12-22 10:10:45,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:10:45,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:10:45,394 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 10:10:45,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567022708] [2020-12-22 10:10:45,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:10:45,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:10:45,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195635178] [2020-12-22 10:10:45,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 10:10:45,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:10:45,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 10:10:45,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:10:45,424 INFO L87 Difference]: Start difference. First operand 944 states. Second operand 2 states. [2020-12-22 10:10:45,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:10:45,527 INFO L93 Difference]: Finished difference Result 1832 states and 3464 transitions. [2020-12-22 10:10:45,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 10:10:45,529 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 42 [2020-12-22 10:10:45,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:10:45,565 INFO L225 Difference]: With dead ends: 1832 [2020-12-22 10:10:45,565 INFO L226 Difference]: Without dead ends: 878 [2020-12-22 10:10:45,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:10:45,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2020-12-22 10:10:45,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 878. [2020-12-22 10:10:45,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 878 states. [2020-12-22 10:10:45,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 1653 transitions. [2020-12-22 10:10:45,705 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 1653 transitions. Word has length 42 [2020-12-22 10:10:45,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:10:45,705 INFO L481 AbstractCegarLoop]: Abstraction has 878 states and 1653 transitions. [2020-12-22 10:10:45,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 10:10:45,706 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 1653 transitions. [2020-12-22 10:10:45,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 10:10:45,713 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:10:45,714 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:10:45,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:10:45,714 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:10:45,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:10:45,715 INFO L82 PathProgramCache]: Analyzing trace with hash 325703937, now seen corresponding path program 1 times [2020-12-22 10:10:45,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:10:45,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676118756] [2020-12-22 10:10:45,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:10:45,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:10:45,954 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 10:10:45,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676118756] [2020-12-22 10:10:45,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:10:45,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:10:45,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109817283] [2020-12-22 10:10:45,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:10:45,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:10:45,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:10:45,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:10:45,960 INFO L87 Difference]: Start difference. First operand 878 states and 1653 transitions. Second operand 5 states. [2020-12-22 10:10:46,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:10:46,179 INFO L93 Difference]: Finished difference Result 950 states and 1765 transitions. [2020-12-22 10:10:46,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:10:46,180 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2020-12-22 10:10:46,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:10:46,185 INFO L225 Difference]: With dead ends: 950 [2020-12-22 10:10:46,186 INFO L226 Difference]: Without dead ends: 878 [2020-12-22 10:10:46,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 10:10:46,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2020-12-22 10:10:46,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 878. [2020-12-22 10:10:46,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 878 states. [2020-12-22 10:10:46,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 1603 transitions. [2020-12-22 10:10:46,209 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 1603 transitions. Word has length 42 [2020-12-22 10:10:46,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:10:46,209 INFO L481 AbstractCegarLoop]: Abstraction has 878 states and 1603 transitions. [2020-12-22 10:10:46,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:10:46,209 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 1603 transitions. [2020-12-22 10:10:46,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 10:10:46,211 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:10:46,211 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:10:46,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:10:46,212 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:10:46,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:10:46,213 INFO L82 PathProgramCache]: Analyzing trace with hash 525423513, now seen corresponding path program 1 times [2020-12-22 10:10:46,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:10:46,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359869699] [2020-12-22 10:10:46,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:10:46,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:10:46,383 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 10:10:46,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359869699] [2020-12-22 10:10:46,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:10:46,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:10:46,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572467899] [2020-12-22 10:10:46,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:10:46,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:10:46,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:10:46,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:10:46,400 INFO L87 Difference]: Start difference. First operand 878 states and 1603 transitions. Second operand 4 states. [2020-12-22 10:10:56,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:10:56,174 INFO L93 Difference]: Finished difference Result 3133 states and 5912 transitions. [2020-12-22 10:10:56,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:10:56,175 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2020-12-22 10:10:56,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:10:56,189 INFO L225 Difference]: With dead ends: 3133 [2020-12-22 10:10:56,189 INFO L226 Difference]: Without dead ends: 2380 [2020-12-22 10:10:56,191 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 10:10:56,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2380 states. [2020-12-22 10:10:56,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2380 to 2380. [2020-12-22 10:10:56,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2380 states. [2020-12-22 10:10:56,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2380 states to 2380 states and 3717 transitions. [2020-12-22 10:10:56,281 INFO L78 Accepts]: Start accepts. Automaton has 2380 states and 3717 transitions. Word has length 61 [2020-12-22 10:10:56,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:10:56,283 INFO L481 AbstractCegarLoop]: Abstraction has 2380 states and 3717 transitions. [2020-12-22 10:10:56,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:10:56,283 INFO L276 IsEmpty]: Start isEmpty. Operand 2380 states and 3717 transitions. [2020-12-22 10:10:56,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:10:56,288 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:10:56,289 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] [2020-12-22 10:10:56,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:10:56,289 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:10:56,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:10:56,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1207745120, now seen corresponding path program 1 times [2020-12-22 10:10:56,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:10:56,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147286567] [2020-12-22 10:10:56,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:10:56,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:10:56,397 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 10:10:56,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147286567] [2020-12-22 10:10:56,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:10:56,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:10:56,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428385172] [2020-12-22 10:10:56,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:10:56,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:10:56,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:10:56,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:10:56,400 INFO L87 Difference]: Start difference. First operand 2380 states and 3717 transitions. Second operand 3 states. [2020-12-22 10:10:56,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:10:56,451 INFO L93 Difference]: Finished difference Result 2510 states and 3923 transitions. [2020-12-22 10:10:56,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:10:56,452 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:10:56,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:10:56,468 INFO L225 Difference]: With dead ends: 2510 [2020-12-22 10:10:56,468 INFO L226 Difference]: Without dead ends: 2442 [2020-12-22 10:10:56,469 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 10:10:56,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2442 states. [2020-12-22 10:10:56,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2442 to 2440. [2020-12-22 10:10:56,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2440 states. [2020-12-22 10:10:56,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2440 states to 2440 states and 3813 transitions. [2020-12-22 10:10:56,546 INFO L78 Accepts]: Start accepts. Automaton has 2440 states and 3813 transitions. Word has length 91 [2020-12-22 10:10:56,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:10:56,548 INFO L481 AbstractCegarLoop]: Abstraction has 2440 states and 3813 transitions. [2020-12-22 10:10:56,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:10:56,548 INFO L276 IsEmpty]: Start isEmpty. Operand 2440 states and 3813 transitions. [2020-12-22 10:10:56,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:10:56,550 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:10:56,551 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] [2020-12-22 10:10:56,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:10:56,551 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:10:56,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:10:56,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1564953708, now seen corresponding path program 1 times [2020-12-22 10:10:56,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:10:56,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665349951] [2020-12-22 10:10:56,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:10:56,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:10:56,709 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 10:10:56,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665349951] [2020-12-22 10:10:56,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:10:56,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:10:56,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572893592] [2020-12-22 10:10:56,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:10:56,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:10:56,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:10:56,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:10:56,712 INFO L87 Difference]: Start difference. First operand 2440 states and 3813 transitions. Second operand 3 states. [2020-12-22 10:10:56,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:10:56,774 INFO L93 Difference]: Finished difference Result 2684 states and 4201 transitions. [2020-12-22 10:10:56,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:10:56,775 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:10:56,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:10:56,790 INFO L225 Difference]: With dead ends: 2684 [2020-12-22 10:10:56,790 INFO L226 Difference]: Without dead ends: 2556 [2020-12-22 10:10:56,791 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 10:10:56,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2020-12-22 10:10:56,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 2554. [2020-12-22 10:10:56,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2554 states. [2020-12-22 10:10:56,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2554 states to 2554 states and 3994 transitions. [2020-12-22 10:10:56,861 INFO L78 Accepts]: Start accepts. Automaton has 2554 states and 3994 transitions. Word has length 91 [2020-12-22 10:10:56,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:10:56,862 INFO L481 AbstractCegarLoop]: Abstraction has 2554 states and 3994 transitions. [2020-12-22 10:10:56,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:10:56,862 INFO L276 IsEmpty]: Start isEmpty. Operand 2554 states and 3994 transitions. [2020-12-22 10:10:56,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:10:56,864 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:10:56,864 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] [2020-12-22 10:10:56,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:10:56,865 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:10:56,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:10:56,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1479108296, now seen corresponding path program 1 times [2020-12-22 10:10:56,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:10:56,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496012415] [2020-12-22 10:10:56,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:10:56,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:10:57,041 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 10:10:57,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496012415] [2020-12-22 10:10:57,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:10:57,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:10:57,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188234473] [2020-12-22 10:10:57,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:10:57,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:10:57,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:10:57,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:10:57,046 INFO L87 Difference]: Start difference. First operand 2554 states and 3994 transitions. Second operand 3 states. [2020-12-22 10:10:57,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:10:57,107 INFO L93 Difference]: Finished difference Result 3014 states and 4724 transitions. [2020-12-22 10:10:57,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:10:57,108 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:10:57,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:10:57,127 INFO L225 Difference]: With dead ends: 3014 [2020-12-22 10:10:57,127 INFO L226 Difference]: Without dead ends: 2772 [2020-12-22 10:10:57,129 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 10:10:57,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2772 states. [2020-12-22 10:10:57,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2772 to 2770. [2020-12-22 10:10:57,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2770 states. [2020-12-22 10:10:57,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2770 states to 2770 states and 4334 transitions. [2020-12-22 10:10:57,219 INFO L78 Accepts]: Start accepts. Automaton has 2770 states and 4334 transitions. Word has length 91 [2020-12-22 10:10:57,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:10:57,221 INFO L481 AbstractCegarLoop]: Abstraction has 2770 states and 4334 transitions. [2020-12-22 10:10:57,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:10:57,221 INFO L276 IsEmpty]: Start isEmpty. Operand 2770 states and 4334 transitions. [2020-12-22 10:10:57,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:10:57,223 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:10:57,223 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] [2020-12-22 10:10:57,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:10:57,225 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:10:57,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:10:57,231 INFO L82 PathProgramCache]: Analyzing trace with hash 733525566, now seen corresponding path program 1 times [2020-12-22 10:10:57,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:10:57,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538303285] [2020-12-22 10:10:57,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:10:57,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:10:57,420 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 10:10:57,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538303285] [2020-12-22 10:10:57,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:10:57,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:10:57,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986404501] [2020-12-22 10:10:57,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:10:57,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:10:57,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:10:57,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:10:57,423 INFO L87 Difference]: Start difference. First operand 2770 states and 4334 transitions. Second operand 3 states. [2020-12-22 10:10:57,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:10:57,495 INFO L93 Difference]: Finished difference Result 3638 states and 5704 transitions. [2020-12-22 10:10:57,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:10:57,496 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:10:57,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:10:57,513 INFO L225 Difference]: With dead ends: 3638 [2020-12-22 10:10:57,514 INFO L226 Difference]: Without dead ends: 3180 [2020-12-22 10:10:57,520 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 10:10:57,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3180 states. [2020-12-22 10:10:57,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3180 to 3178. [2020-12-22 10:10:57,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3178 states. [2020-12-22 10:10:57,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3178 states to 3178 states and 4970 transitions. [2020-12-22 10:10:57,622 INFO L78 Accepts]: Start accepts. Automaton has 3178 states and 4970 transitions. Word has length 91 [2020-12-22 10:10:57,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:10:57,624 INFO L481 AbstractCegarLoop]: Abstraction has 3178 states and 4970 transitions. [2020-12-22 10:10:57,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:10:57,624 INFO L276 IsEmpty]: Start isEmpty. Operand 3178 states and 4970 transitions. [2020-12-22 10:10:57,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:10:57,625 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:10:57,625 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] [2020-12-22 10:10:57,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:10:57,626 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:10:57,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:10:57,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1206505292, now seen corresponding path program 1 times [2020-12-22 10:10:57,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:10:57,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572516008] [2020-12-22 10:10:57,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:10:57,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:10:57,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:10:57,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572516008] [2020-12-22 10:10:57,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:10:57,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:10:57,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048250705] [2020-12-22 10:10:57,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:10:57,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:10:57,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:10:57,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:10:57,744 INFO L87 Difference]: Start difference. First operand 3178 states and 4970 transitions. Second operand 3 states. [2020-12-22 10:10:57,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:10:57,858 INFO L93 Difference]: Finished difference Result 4814 states and 7532 transitions. [2020-12-22 10:10:57,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:10:57,858 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:10:57,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:10:57,878 INFO L225 Difference]: With dead ends: 4814 [2020-12-22 10:10:57,878 INFO L226 Difference]: Without dead ends: 3948 [2020-12-22 10:10:57,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:10:57,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3948 states. [2020-12-22 10:10:58,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3948 to 3946. [2020-12-22 10:10:58,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3946 states. [2020-12-22 10:10:58,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3946 states to 3946 states and 6154 transitions. [2020-12-22 10:10:58,031 INFO L78 Accepts]: Start accepts. Automaton has 3946 states and 6154 transitions. Word has length 91 [2020-12-22 10:10:58,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:10:58,033 INFO L481 AbstractCegarLoop]: Abstraction has 3946 states and 6154 transitions. [2020-12-22 10:10:58,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:10:58,033 INFO L276 IsEmpty]: Start isEmpty. Operand 3946 states and 6154 transitions. [2020-12-22 10:10:58,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:10:58,035 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:10:58,035 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, 1, 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 10:10:58,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:10:58,035 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:10:58,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:10:58,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1494177322, now seen corresponding path program 1 times [2020-12-22 10:10:58,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:10:58,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719698828] [2020-12-22 10:10:58,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:10:58,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:10:58,212 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 10:10:58,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719698828] [2020-12-22 10:10:58,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:10:58,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:10:58,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240380607] [2020-12-22 10:10:58,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:10:58,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:10:58,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:10:58,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:10:58,218 INFO L87 Difference]: Start difference. First operand 3946 states and 6154 transitions. Second operand 9 states. [2020-12-22 10:10:59,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:10:59,531 INFO L93 Difference]: Finished difference Result 26822 states and 41784 transitions. [2020-12-22 10:10:59,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 10:10:59,532 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 91 [2020-12-22 10:10:59,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:10:59,632 INFO L225 Difference]: With dead ends: 26822 [2020-12-22 10:10:59,633 INFO L226 Difference]: Without dead ends: 25188 [2020-12-22 10:10:59,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:10:59,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25188 states. [2020-12-22 10:11:00,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25188 to 5578. [2020-12-22 10:11:00,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5578 states. [2020-12-22 10:11:00,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5578 states to 5578 states and 8634 transitions. [2020-12-22 10:11:00,169 INFO L78 Accepts]: Start accepts. Automaton has 5578 states and 8634 transitions. Word has length 91 [2020-12-22 10:11:00,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:11:00,169 INFO L481 AbstractCegarLoop]: Abstraction has 5578 states and 8634 transitions. [2020-12-22 10:11:00,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:11:00,169 INFO L276 IsEmpty]: Start isEmpty. Operand 5578 states and 8634 transitions. [2020-12-22 10:11:00,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:11:00,170 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:11:00,171 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] [2020-12-22 10:11:00,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:11:00,171 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:11:00,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:11:00,172 INFO L82 PathProgramCache]: Analyzing trace with hash -30360326, now seen corresponding path program 1 times [2020-12-22 10:11:00,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:11:00,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14341718] [2020-12-22 10:11:00,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:11:00,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:11:00,252 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 10:11:00,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14341718] [2020-12-22 10:11:00,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:11:00,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:11:00,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643643814] [2020-12-22 10:11:00,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:11:00,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:11:00,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:11:00,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:11:00,258 INFO L87 Difference]: Start difference. First operand 5578 states and 8634 transitions. Second operand 3 states. [2020-12-22 10:11:00,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:11:00,751 INFO L93 Difference]: Finished difference Result 10400 states and 16046 transitions. [2020-12-22 10:11:00,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:11:00,755 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:11:00,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:11:00,775 INFO L225 Difference]: With dead ends: 10400 [2020-12-22 10:11:00,775 INFO L226 Difference]: Without dead ends: 7134 [2020-12-22 10:11:00,784 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 10:11:00,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7134 states. [2020-12-22 10:11:01,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7134 to 7132. [2020-12-22 10:11:01,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7132 states. [2020-12-22 10:11:01,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7132 states to 7132 states and 10972 transitions. [2020-12-22 10:11:01,277 INFO L78 Accepts]: Start accepts. Automaton has 7132 states and 10972 transitions. Word has length 93 [2020-12-22 10:11:01,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:11:01,278 INFO L481 AbstractCegarLoop]: Abstraction has 7132 states and 10972 transitions. [2020-12-22 10:11:01,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:11:01,278 INFO L276 IsEmpty]: Start isEmpty. Operand 7132 states and 10972 transitions. [2020-12-22 10:11:01,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:11:01,280 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:11:01,280 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] [2020-12-22 10:11:01,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:11:01,280 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:11:01,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:11:01,281 INFO L82 PathProgramCache]: Analyzing trace with hash 36133186, now seen corresponding path program 1 times [2020-12-22 10:11:01,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:11:01,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141860370] [2020-12-22 10:11:01,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:11:01,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:11:01,653 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 10:11:01,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141860370] [2020-12-22 10:11:01,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:11:01,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:11:01,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135249209] [2020-12-22 10:11:01,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:11:01,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:11:01,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:11:01,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:11:01,658 INFO L87 Difference]: Start difference. First operand 7132 states and 10972 transitions. Second operand 9 states. [2020-12-22 10:11:02,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:11:02,419 INFO L93 Difference]: Finished difference Result 11952 states and 18334 transitions. [2020-12-22 10:11:02,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:11:02,420 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 93 [2020-12-22 10:11:02,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:11:02,435 INFO L225 Difference]: With dead ends: 11952 [2020-12-22 10:11:02,436 INFO L226 Difference]: Without dead ends: 7134 [2020-12-22 10:11:02,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:11:02,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7134 states. [2020-12-22 10:11:02,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7134 to 7132. [2020-12-22 10:11:02,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7132 states. [2020-12-22 10:11:02,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7132 states to 7132 states and 10924 transitions. [2020-12-22 10:11:02,832 INFO L78 Accepts]: Start accepts. Automaton has 7132 states and 10924 transitions. Word has length 93 [2020-12-22 10:11:02,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:11:02,833 INFO L481 AbstractCegarLoop]: Abstraction has 7132 states and 10924 transitions. [2020-12-22 10:11:02,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:11:02,833 INFO L276 IsEmpty]: Start isEmpty. Operand 7132 states and 10924 transitions. [2020-12-22 10:11:02,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:11:02,834 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:11:02,834 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] [2020-12-22 10:11:02,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:11:02,835 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:11:02,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:11:02,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1825047262, now seen corresponding path program 1 times [2020-12-22 10:11:02,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:11:02,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775279070] [2020-12-22 10:11:02,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:11:02,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:11:02,911 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 10:11:02,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775279070] [2020-12-22 10:11:02,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:11:02,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:11:02,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443931472] [2020-12-22 10:11:02,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:11:02,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:11:02,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:11:02,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:11:02,914 INFO L87 Difference]: Start difference. First operand 7132 states and 10924 transitions. Second operand 3 states. [2020-12-22 10:11:03,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:11:03,570 INFO L93 Difference]: Finished difference Result 16192 states and 24590 transitions. [2020-12-22 10:11:03,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:11:03,571 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:11:03,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:11:03,594 INFO L225 Difference]: With dead ends: 16192 [2020-12-22 10:11:03,594 INFO L226 Difference]: Without dead ends: 11374 [2020-12-22 10:11:03,601 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 10:11:03,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11374 states. [2020-12-22 10:11:04,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11374 to 11372. [2020-12-22 10:11:04,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11372 states. [2020-12-22 10:11:04,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11372 states to 11372 states and 17180 transitions. [2020-12-22 10:11:04,199 INFO L78 Accepts]: Start accepts. Automaton has 11372 states and 17180 transitions. Word has length 93 [2020-12-22 10:11:04,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:11:04,199 INFO L481 AbstractCegarLoop]: Abstraction has 11372 states and 17180 transitions. [2020-12-22 10:11:04,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:11:04,200 INFO L276 IsEmpty]: Start isEmpty. Operand 11372 states and 17180 transitions. [2020-12-22 10:11:04,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:11:04,201 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:11:04,201 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] [2020-12-22 10:11:04,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:11:04,202 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:11:04,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:11:04,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1222412418, now seen corresponding path program 1 times [2020-12-22 10:11:04,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:11:04,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858378737] [2020-12-22 10:11:04,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:11:04,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:11:04,277 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 10:11:04,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858378737] [2020-12-22 10:11:04,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:11:04,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:11:04,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845684171] [2020-12-22 10:11:04,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:11:04,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:11:04,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:11:04,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:11:04,279 INFO L87 Difference]: Start difference. First operand 11372 states and 17180 transitions. Second operand 3 states. [2020-12-22 10:11:05,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:11:05,486 INFO L93 Difference]: Finished difference Result 28336 states and 42398 transitions. [2020-12-22 10:11:05,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:11:05,487 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:11:05,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:11:05,527 INFO L225 Difference]: With dead ends: 28336 [2020-12-22 10:11:05,527 INFO L226 Difference]: Without dead ends: 19278 [2020-12-22 10:11:05,539 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 10:11:05,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19278 states. [2020-12-22 10:11:06,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19278 to 19276. [2020-12-22 10:11:06,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19276 states. [2020-12-22 10:11:06,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19276 states to 19276 states and 28636 transitions. [2020-12-22 10:11:06,750 INFO L78 Accepts]: Start accepts. Automaton has 19276 states and 28636 transitions. Word has length 93 [2020-12-22 10:11:06,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:11:06,750 INFO L481 AbstractCegarLoop]: Abstraction has 19276 states and 28636 transitions. [2020-12-22 10:11:06,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:11:06,750 INFO L276 IsEmpty]: Start isEmpty. Operand 19276 states and 28636 transitions. [2020-12-22 10:11:06,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:11:06,751 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:11:06,752 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:11:06,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:11:06,752 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:11:06,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:11:06,753 INFO L82 PathProgramCache]: Analyzing trace with hash 705405902, now seen corresponding path program 1 times [2020-12-22 10:11:06,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:11:06,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766929884] [2020-12-22 10:11:06,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:11:06,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:11:06,848 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 10:11:06,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766929884] [2020-12-22 10:11:06,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:11:06,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:11:06,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004868641] [2020-12-22 10:11:06,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:11:06,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:11:06,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:11:06,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:11:06,851 INFO L87 Difference]: Start difference. First operand 19276 states and 28636 transitions. Second operand 6 states. [2020-12-22 10:11:09,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:11:09,273 INFO L93 Difference]: Finished difference Result 51856 states and 76830 transitions. [2020-12-22 10:11:09,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:11:09,274 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 94 [2020-12-22 10:11:09,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:11:09,344 INFO L225 Difference]: With dead ends: 51856 [2020-12-22 10:11:09,344 INFO L226 Difference]: Without dead ends: 34894 [2020-12-22 10:11:09,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:11:09,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34894 states. [2020-12-22 10:11:10,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34894 to 30796. [2020-12-22 10:11:10,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30796 states. [2020-12-22 10:11:11,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30796 states to 30796 states and 45532 transitions. [2020-12-22 10:11:11,046 INFO L78 Accepts]: Start accepts. Automaton has 30796 states and 45532 transitions. Word has length 94 [2020-12-22 10:11:11,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:11:11,049 INFO L481 AbstractCegarLoop]: Abstraction has 30796 states and 45532 transitions. [2020-12-22 10:11:11,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:11:11,049 INFO L276 IsEmpty]: Start isEmpty. Operand 30796 states and 45532 transitions. [2020-12-22 10:11:11,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:11:11,050 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:11:11,050 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] [2020-12-22 10:11:11,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:11:11,050 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:11:11,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:11:11,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1549411404, now seen corresponding path program 1 times [2020-12-22 10:11:11,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:11:11,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660649640] [2020-12-22 10:11:11,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:11:11,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:11:11,313 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 10:11:11,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660649640] [2020-12-22 10:11:11,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:11:11,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:11:11,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487296251] [2020-12-22 10:11:11,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:11:11,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:11:11,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:11:11,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:11:11,315 INFO L87 Difference]: Start difference. First operand 30796 states and 45532 transitions. Second operand 6 states. [2020-12-22 10:11:13,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:11:13,253 INFO L93 Difference]: Finished difference Result 59278 states and 87453 transitions. [2020-12-22 10:11:13,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:11:13,254 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 94 [2020-12-22 10:11:13,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:11:13,387 INFO L225 Difference]: With dead ends: 59278 [2020-12-22 10:11:13,388 INFO L226 Difference]: Without dead ends: 30796 [2020-12-22 10:11:13,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:11:13,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30796 states. [2020-12-22 10:11:15,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30796 to 30796. [2020-12-22 10:11:15,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30796 states. [2020-12-22 10:11:15,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30796 states to 30796 states and 45212 transitions. [2020-12-22 10:11:15,299 INFO L78 Accepts]: Start accepts. Automaton has 30796 states and 45212 transitions. Word has length 94 [2020-12-22 10:11:15,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:11:15,299 INFO L481 AbstractCegarLoop]: Abstraction has 30796 states and 45212 transitions. [2020-12-22 10:11:15,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:11:15,299 INFO L276 IsEmpty]: Start isEmpty. Operand 30796 states and 45212 transitions. [2020-12-22 10:11:15,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:11:15,300 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:11:15,300 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:11:15,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:11:15,300 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:11:15,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:11:15,301 INFO L82 PathProgramCache]: Analyzing trace with hash 847811530, now seen corresponding path program 1 times [2020-12-22 10:11:15,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:11:15,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464361742] [2020-12-22 10:11:15,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:11:15,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:11:15,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:11:15,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464361742] [2020-12-22 10:11:15,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:11:15,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:11:15,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572035342] [2020-12-22 10:11:15,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:11:15,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:11:15,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:11:15,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:11:15,411 INFO L87 Difference]: Start difference. First operand 30796 states and 45212 transitions. Second operand 8 states. [2020-12-22 10:11:19,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:11:19,529 INFO L93 Difference]: Finished difference Result 57839 states and 83910 transitions. [2020-12-22 10:11:19,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:11:19,530 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 94 [2020-12-22 10:11:19,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:11:19,625 INFO L225 Difference]: With dead ends: 57839 [2020-12-22 10:11:19,625 INFO L226 Difference]: Without dead ends: 57837 [2020-12-22 10:11:19,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:11:19,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57837 states. [2020-12-22 10:11:22,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57837 to 32332. [2020-12-22 10:11:22,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32332 states. [2020-12-22 10:11:22,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32332 states to 32332 states and 46684 transitions. [2020-12-22 10:11:22,294 INFO L78 Accepts]: Start accepts. Automaton has 32332 states and 46684 transitions. Word has length 94 [2020-12-22 10:11:22,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:11:22,295 INFO L481 AbstractCegarLoop]: Abstraction has 32332 states and 46684 transitions. [2020-12-22 10:11:22,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:11:22,295 INFO L276 IsEmpty]: Start isEmpty. Operand 32332 states and 46684 transitions. [2020-12-22 10:11:22,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:11:22,313 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:11:22,313 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:11:22,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:11:22,314 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:11:22,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:11:22,314 INFO L82 PathProgramCache]: Analyzing trace with hash 101873069, now seen corresponding path program 1 times [2020-12-22 10:11:22,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:11:22,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930570044] [2020-12-22 10:11:22,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:11:22,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:11:22,504 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 10:11:22,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930570044] [2020-12-22 10:11:22,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:11:22,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:11:22,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338567685] [2020-12-22 10:11:22,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:11:22,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:11:22,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:11:22,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:11:22,507 INFO L87 Difference]: Start difference. First operand 32332 states and 46684 transitions. Second operand 9 states. [2020-12-22 10:11:36,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:11:36,645 INFO L93 Difference]: Finished difference Result 252060 states and 361668 transitions. [2020-12-22 10:11:36,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:11:36,645 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:11:36,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:11:37,250 INFO L225 Difference]: With dead ends: 252060 [2020-12-22 10:11:37,250 INFO L226 Difference]: Without dead ends: 222042 [2020-12-22 10:11:37,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:11:37,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222042 states. [2020-12-22 10:11:43,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222042 to 62348. [2020-12-22 10:11:43,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62348 states. [2020-12-22 10:11:43,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62348 states to 62348 states and 89436 transitions. [2020-12-22 10:11:43,365 INFO L78 Accepts]: Start accepts. Automaton has 62348 states and 89436 transitions. Word has length 130 [2020-12-22 10:11:43,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:11:43,365 INFO L481 AbstractCegarLoop]: Abstraction has 62348 states and 89436 transitions. [2020-12-22 10:11:43,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:11:43,365 INFO L276 IsEmpty]: Start isEmpty. Operand 62348 states and 89436 transitions. [2020-12-22 10:11:43,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:11:43,389 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:11:43,390 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:11:43,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:11:43,390 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:11:43,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:11:43,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1349380685, now seen corresponding path program 1 times [2020-12-22 10:11:43,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:11:43,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724955438] [2020-12-22 10:11:43,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:11:43,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:11:43,553 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 10:11:43,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724955438] [2020-12-22 10:11:43,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:11:43,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:11:43,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774657107] [2020-12-22 10:11:43,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:11:43,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:11:43,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:11:43,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:11:43,555 INFO L87 Difference]: Start difference. First operand 62348 states and 89436 transitions. Second operand 9 states. [2020-12-22 10:12:01,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:01,111 INFO L93 Difference]: Finished difference Result 282076 states and 404420 transitions. [2020-12-22 10:12:01,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:12:01,112 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:12:01,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:01,522 INFO L225 Difference]: With dead ends: 282076 [2020-12-22 10:12:01,522 INFO L226 Difference]: Without dead ends: 252058 [2020-12-22 10:12:01,611 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:12:02,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252058 states. [2020-12-22 10:12:10,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252058 to 107404. [2020-12-22 10:12:10,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107404 states. [2020-12-22 10:12:11,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107404 states to 107404 states and 153276 transitions. [2020-12-22 10:12:11,128 INFO L78 Accepts]: Start accepts. Automaton has 107404 states and 153276 transitions. Word has length 130 [2020-12-22 10:12:11,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:11,128 INFO L481 AbstractCegarLoop]: Abstraction has 107404 states and 153276 transitions. [2020-12-22 10:12:11,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:12:11,128 INFO L276 IsEmpty]: Start isEmpty. Operand 107404 states and 153276 transitions. [2020-12-22 10:12:11,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:12:11,154 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:11,155 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:12:11,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:12:11,155 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:11,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:11,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1476153629, now seen corresponding path program 1 times [2020-12-22 10:12:11,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:11,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111195445] [2020-12-22 10:12:11,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:11,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:11,314 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 10:12:11,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111195445] [2020-12-22 10:12:11,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:11,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:12:11,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426900823] [2020-12-22 10:12:11,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:12:11,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:11,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:12:11,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:12:11,317 INFO L87 Difference]: Start difference. First operand 107404 states and 153276 transitions. Second operand 9 states. [2020-12-22 10:12:31,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:31,725 INFO L93 Difference]: Finished difference Result 312092 states and 447172 transitions. [2020-12-22 10:12:31,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:12:31,726 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:12:31,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:32,401 INFO L225 Difference]: With dead ends: 312092 [2020-12-22 10:12:32,402 INFO L226 Difference]: Without dead ends: 282074 [2020-12-22 10:12:32,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:12:32,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282074 states. [2020-12-22 10:12:44,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282074 to 137420. [2020-12-22 10:12:44,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137420 states. [2020-12-22 10:12:45,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137420 states to 137420 states and 196028 transitions. [2020-12-22 10:12:45,096 INFO L78 Accepts]: Start accepts. Automaton has 137420 states and 196028 transitions. Word has length 130 [2020-12-22 10:12:45,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:45,097 INFO L481 AbstractCegarLoop]: Abstraction has 137420 states and 196028 transitions. [2020-12-22 10:12:45,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:12:45,097 INFO L276 IsEmpty]: Start isEmpty. Operand 137420 states and 196028 transitions. [2020-12-22 10:12:45,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:12:45,142 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:45,143 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:12:45,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:12:45,143 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:45,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:45,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1583354627, now seen corresponding path program 1 times [2020-12-22 10:12:45,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:45,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913332185] [2020-12-22 10:12:45,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:45,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:45,368 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 10:12:45,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913332185] [2020-12-22 10:12:45,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:45,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:12:45,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079544308] [2020-12-22 10:12:45,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:12:45,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:45,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:12:45,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:12:45,371 INFO L87 Difference]: Start difference. First operand 137420 states and 196028 transitions. Second operand 9 states. [2020-12-22 10:13:10,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:10,589 INFO L93 Difference]: Finished difference Result 342108 states and 489924 transitions. [2020-12-22 10:13:10,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:13:10,590 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:13:10,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:11,131 INFO L225 Difference]: With dead ends: 342108 [2020-12-22 10:13:11,131 INFO L226 Difference]: Without dead ends: 312090 [2020-12-22 10:13:11,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:13:11,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312090 states. [2020-12-22 10:13:26,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312090 to 167436. [2020-12-22 10:13:26,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167436 states. [2020-12-22 10:13:27,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167436 states to 167436 states and 238780 transitions. [2020-12-22 10:13:27,322 INFO L78 Accepts]: Start accepts. Automaton has 167436 states and 238780 transitions. Word has length 130 [2020-12-22 10:13:27,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:27,322 INFO L481 AbstractCegarLoop]: Abstraction has 167436 states and 238780 transitions. [2020-12-22 10:13:27,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:13:27,322 INFO L276 IsEmpty]: Start isEmpty. Operand 167436 states and 238780 transitions. [2020-12-22 10:13:27,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:13:27,349 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:27,349 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:13:27,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 10:13:27,349 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:27,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:27,350 INFO L82 PathProgramCache]: Analyzing trace with hash 162359075, now seen corresponding path program 1 times [2020-12-22 10:13:27,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:27,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802892568] [2020-12-22 10:13:27,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:27,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:27,516 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 10:13:27,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802892568] [2020-12-22 10:13:27,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:27,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:13:27,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018308704] [2020-12-22 10:13:27,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:13:27,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:27,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:13:27,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:13:27,518 INFO L87 Difference]: Start difference. First operand 167436 states and 238780 transitions. Second operand 9 states.