/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.ufo.BOUNDED-14.pals+Problem12_label09.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:14:34,124 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:14:34,128 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:14:34,188 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:14:34,189 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:14:34,194 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:14:34,198 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:14:34,207 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:14:34,211 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:14:34,218 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:14:34,220 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:14:34,222 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:14:34,222 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:14:34,226 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:14:34,228 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:14:34,230 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:14:34,231 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:14:34,234 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:14:34,273 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:14:34,284 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:14:34,289 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:14:34,292 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:14:34,302 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:14:34,305 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:14:34,314 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:14:34,329 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:14:34,330 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:14:34,331 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:14:34,337 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:14:34,391 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:14:34,392 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:14:34,395 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:14:34,396 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:14:34,396 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:14:34,396 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:14:34,397 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:14:34,397 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:14:34,397 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:14:34,398 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:14:34,399 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:14:34,399 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:14:34,399 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:14:34,400 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:14:34,400 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:14:34,400 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:14:34,401 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:14:34,401 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:14:34,401 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:14:34,402 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:14:34,402 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:14:34,403 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:14:34,403 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:14:34,403 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:14:34,404 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:14:34,404 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:14:34,813 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:14:34,847 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:14:34,850 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:14:34,852 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:14:34,855 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:14:34,856 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.7.ufo.BOUNDED-14.pals+Problem12_label09.c [2020-12-22 10:14:34,950 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38785bbfe/5ca1be5676bb4ae7a23ce3cb60f201d2/FLAG641b5190c [2020-12-22 10:14:36,030 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:14:36,031 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.7.ufo.BOUNDED-14.pals+Problem12_label09.c [2020-12-22 10:14:36,079 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38785bbfe/5ca1be5676bb4ae7a23ce3cb60f201d2/FLAG641b5190c [2020-12-22 10:14:36,435 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38785bbfe/5ca1be5676bb4ae7a23ce3cb60f201d2 [2020-12-22 10:14:36,438 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:14:36,442 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:14:36,447 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:14:36,447 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:14:36,451 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:14:36,452 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:14:36" (1/1) ... [2020-12-22 10:14:36,455 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@303dcc25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:14:36, skipping insertion in model container [2020-12-22 10:14:36,456 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:14:36" (1/1) ... [2020-12-22 10:14:36,466 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:14:36,622 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:14:37,110 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.ufo.BOUNDED-14.pals+Problem12_label09.c[20544,20557] [2020-12-22 10:14:37,168 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.ufo.BOUNDED-14.pals+Problem12_label09.c[28049,28062] [2020-12-22 10:14:38,050 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:14:38,067 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:14:38,288 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.ufo.BOUNDED-14.pals+Problem12_label09.c[20544,20557] [2020-12-22 10:14:38,314 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.ufo.BOUNDED-14.pals+Problem12_label09.c[28049,28062] [2020-12-22 10:14:38,938 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:14:39,030 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:14:39,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:14:39 WrapperNode [2020-12-22 10:14:39,036 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:14:39,037 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:14:39,038 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:14:39,038 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:14:39,055 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:14:39" (1/1) ... [2020-12-22 10:14:39,132 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:14:39" (1/1) ... [2020-12-22 10:14:39,579 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:14:39,581 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:14:39,582 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:14:39,582 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:14:39,590 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:14:39" (1/1) ... [2020-12-22 10:14:39,590 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:14:39" (1/1) ... [2020-12-22 10:14:39,697 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:14:39" (1/1) ... [2020-12-22 10:14:39,698 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:14:39" (1/1) ... [2020-12-22 10:14:39,861 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:14:39" (1/1) ... [2020-12-22 10:14:39,888 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:14:39" (1/1) ... [2020-12-22 10:14:40,089 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:14:39" (1/1) ... [2020-12-22 10:14:40,166 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:14:40,167 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:14:40,167 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:14:40,167 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:14:40,168 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:14:39" (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 10:14:40,277 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:14:40,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:14:40,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:14:40,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:14:45,902 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:14:45,902 INFO L299 CfgBuilder]: Removed 40 assume(true) statements. [2020-12-22 10:14:45,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:14:45 BoogieIcfgContainer [2020-12-22 10:14:45,906 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:14:45,908 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:14:45,909 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:14:45,913 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:14:45,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:14:36" (1/3) ... [2020-12-22 10:14:45,914 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8d304d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:14:45, skipping insertion in model container [2020-12-22 10:14:45,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:14:39" (2/3) ... [2020-12-22 10:14:45,914 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8d304d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:14:45, skipping insertion in model container [2020-12-22 10:14:45,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:14:45" (3/3) ... [2020-12-22 10:14:45,916 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.ufo.BOUNDED-14.pals+Problem12_label09.c [2020-12-22 10:14:45,923 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:14:45,940 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:14:45,962 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:14:46,008 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:14:46,009 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:14:46,009 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:14:46,009 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:14:46,009 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:14:46,010 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:14:46,010 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:14:46,010 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:14:46,047 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states. [2020-12-22 10:14:46,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 10:14:46,059 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:46,061 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 10:14:46,061 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:46,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:46,069 INFO L82 PathProgramCache]: Analyzing trace with hash 720070723, now seen corresponding path program 1 times [2020-12-22 10:14:46,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:46,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094132447] [2020-12-22 10:14:46,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:46,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:46,471 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 10:14:46,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094132447] [2020-12-22 10:14:46,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:46,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:14:46,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925126835] [2020-12-22 10:14:46,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 10:14:46,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:46,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 10:14:46,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:14:46,503 INFO L87 Difference]: Start difference. First operand 944 states. Second operand 2 states. [2020-12-22 10:14:46,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:46,604 INFO L93 Difference]: Finished difference Result 1832 states and 3464 transitions. [2020-12-22 10:14:46,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 10:14:46,605 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 42 [2020-12-22 10:14:46,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:46,663 INFO L225 Difference]: With dead ends: 1832 [2020-12-22 10:14:46,663 INFO L226 Difference]: Without dead ends: 878 [2020-12-22 10:14:46,679 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 10:14:46,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2020-12-22 10:14:46,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 878. [2020-12-22 10:14:46,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 878 states. [2020-12-22 10:14:46,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 1653 transitions. [2020-12-22 10:14:46,807 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 1653 transitions. Word has length 42 [2020-12-22 10:14:46,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:46,808 INFO L481 AbstractCegarLoop]: Abstraction has 878 states and 1653 transitions. [2020-12-22 10:14:46,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 10:14:46,808 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 1653 transitions. [2020-12-22 10:14:46,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 10:14:46,810 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:46,811 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 10:14:46,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:14:46,811 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:46,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:46,812 INFO L82 PathProgramCache]: Analyzing trace with hash 325703937, now seen corresponding path program 1 times [2020-12-22 10:14:46,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:46,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210020715] [2020-12-22 10:14:46,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:46,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:46,957 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 10:14:46,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210020715] [2020-12-22 10:14:46,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:46,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:14:46,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095496827] [2020-12-22 10:14:46,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:14:46,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:46,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:14:46,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:14:46,964 INFO L87 Difference]: Start difference. First operand 878 states and 1653 transitions. Second operand 5 states. [2020-12-22 10:14:47,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:47,129 INFO L93 Difference]: Finished difference Result 950 states and 1765 transitions. [2020-12-22 10:14:47,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:14:47,130 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2020-12-22 10:14:47,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:47,136 INFO L225 Difference]: With dead ends: 950 [2020-12-22 10:14:47,136 INFO L226 Difference]: Without dead ends: 878 [2020-12-22 10:14:47,137 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 10:14:47,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2020-12-22 10:14:47,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 878. [2020-12-22 10:14:47,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 878 states. [2020-12-22 10:14:47,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 1603 transitions. [2020-12-22 10:14:47,161 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 1603 transitions. Word has length 42 [2020-12-22 10:14:47,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:47,162 INFO L481 AbstractCegarLoop]: Abstraction has 878 states and 1603 transitions. [2020-12-22 10:14:47,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:14:47,162 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 1603 transitions. [2020-12-22 10:14:47,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 10:14:47,165 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:47,165 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:14:47,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:14:47,166 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:47,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:47,167 INFO L82 PathProgramCache]: Analyzing trace with hash -131611855, now seen corresponding path program 1 times [2020-12-22 10:14:47,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:47,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662586952] [2020-12-22 10:14:47,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:47,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:47,423 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 10:14:47,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662586952] [2020-12-22 10:14:47,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:47,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:14:47,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700077670] [2020-12-22 10:14:47,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:14:47,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:47,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:14:47,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:14:47,434 INFO L87 Difference]: Start difference. First operand 878 states and 1603 transitions. Second operand 4 states. [2020-12-22 10:14:58,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:58,779 INFO L93 Difference]: Finished difference Result 3133 states and 5912 transitions. [2020-12-22 10:14:58,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:14:58,780 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-12-22 10:14:58,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:58,808 INFO L225 Difference]: With dead ends: 3133 [2020-12-22 10:14:58,809 INFO L226 Difference]: Without dead ends: 2380 [2020-12-22 10:14:58,812 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 10:14:58,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2380 states. [2020-12-22 10:14:58,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2380 to 2380. [2020-12-22 10:14:58,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2380 states. [2020-12-22 10:14:58,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2380 states to 2380 states and 3717 transitions. [2020-12-22 10:14:58,893 INFO L78 Accepts]: Start accepts. Automaton has 2380 states and 3717 transitions. Word has length 67 [2020-12-22 10:14:58,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:58,894 INFO L481 AbstractCegarLoop]: Abstraction has 2380 states and 3717 transitions. [2020-12-22 10:14:58,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:14:58,895 INFO L276 IsEmpty]: Start isEmpty. Operand 2380 states and 3717 transitions. [2020-12-22 10:14:58,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:14:58,905 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:58,906 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 10:14:58,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:14:58,906 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:58,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:58,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1207745120, now seen corresponding path program 1 times [2020-12-22 10:14:58,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:58,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000482143] [2020-12-22 10:14:58,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:58,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:59,109 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 10:14:59,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000482143] [2020-12-22 10:14:59,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:59,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:14:59,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628349856] [2020-12-22 10:14:59,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:14:59,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:59,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:14:59,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:14:59,112 INFO L87 Difference]: Start difference. First operand 2380 states and 3717 transitions. Second operand 3 states. [2020-12-22 10:14:59,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:59,158 INFO L93 Difference]: Finished difference Result 2510 states and 3923 transitions. [2020-12-22 10:14:59,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:14:59,159 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:14:59,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:59,173 INFO L225 Difference]: With dead ends: 2510 [2020-12-22 10:14:59,173 INFO L226 Difference]: Without dead ends: 2442 [2020-12-22 10:14:59,175 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 10:14:59,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2442 states. [2020-12-22 10:14:59,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2442 to 2440. [2020-12-22 10:14:59,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2440 states. [2020-12-22 10:14:59,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2440 states to 2440 states and 3813 transitions. [2020-12-22 10:14:59,236 INFO L78 Accepts]: Start accepts. Automaton has 2440 states and 3813 transitions. Word has length 91 [2020-12-22 10:14:59,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:59,237 INFO L481 AbstractCegarLoop]: Abstraction has 2440 states and 3813 transitions. [2020-12-22 10:14:59,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:14:59,237 INFO L276 IsEmpty]: Start isEmpty. Operand 2440 states and 3813 transitions. [2020-12-22 10:14:59,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:14:59,238 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:59,238 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 10:14:59,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:14:59,239 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:59,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:59,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1564953708, now seen corresponding path program 1 times [2020-12-22 10:14:59,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:59,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294853101] [2020-12-22 10:14:59,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:59,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:59,323 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 10:14:59,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294853101] [2020-12-22 10:14:59,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:59,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:14:59,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011738785] [2020-12-22 10:14:59,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:14:59,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:59,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:14:59,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:14:59,326 INFO L87 Difference]: Start difference. First operand 2440 states and 3813 transitions. Second operand 3 states. [2020-12-22 10:14:59,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:59,379 INFO L93 Difference]: Finished difference Result 2684 states and 4201 transitions. [2020-12-22 10:14:59,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:14:59,380 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:14:59,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:59,396 INFO L225 Difference]: With dead ends: 2684 [2020-12-22 10:14:59,396 INFO L226 Difference]: Without dead ends: 2556 [2020-12-22 10:14:59,397 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 10:14:59,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2020-12-22 10:14:59,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 2554. [2020-12-22 10:14:59,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2554 states. [2020-12-22 10:14:59,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2554 states to 2554 states and 3994 transitions. [2020-12-22 10:14:59,462 INFO L78 Accepts]: Start accepts. Automaton has 2554 states and 3994 transitions. Word has length 91 [2020-12-22 10:14:59,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:59,463 INFO L481 AbstractCegarLoop]: Abstraction has 2554 states and 3994 transitions. [2020-12-22 10:14:59,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:14:59,463 INFO L276 IsEmpty]: Start isEmpty. Operand 2554 states and 3994 transitions. [2020-12-22 10:14:59,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:14:59,465 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:59,465 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 10:14:59,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:14:59,465 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:59,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:59,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1479108296, now seen corresponding path program 1 times [2020-12-22 10:14:59,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:59,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571539078] [2020-12-22 10:14:59,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:59,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:59,543 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 10:14:59,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571539078] [2020-12-22 10:14:59,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:59,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:14:59,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437597325] [2020-12-22 10:14:59,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:14:59,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:59,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:14:59,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:14:59,546 INFO L87 Difference]: Start difference. First operand 2554 states and 3994 transitions. Second operand 3 states. [2020-12-22 10:14:59,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:59,605 INFO L93 Difference]: Finished difference Result 3014 states and 4724 transitions. [2020-12-22 10:14:59,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:14:59,606 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:14:59,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:59,624 INFO L225 Difference]: With dead ends: 3014 [2020-12-22 10:14:59,625 INFO L226 Difference]: Without dead ends: 2772 [2020-12-22 10:14:59,627 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 10:14:59,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2772 states. [2020-12-22 10:14:59,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2772 to 2770. [2020-12-22 10:14:59,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2770 states. [2020-12-22 10:14:59,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2770 states to 2770 states and 4334 transitions. [2020-12-22 10:14:59,714 INFO L78 Accepts]: Start accepts. Automaton has 2770 states and 4334 transitions. Word has length 91 [2020-12-22 10:14:59,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:59,714 INFO L481 AbstractCegarLoop]: Abstraction has 2770 states and 4334 transitions. [2020-12-22 10:14:59,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:14:59,714 INFO L276 IsEmpty]: Start isEmpty. Operand 2770 states and 4334 transitions. [2020-12-22 10:14:59,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:14:59,715 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:59,716 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 10:14:59,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:14:59,716 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:59,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:59,717 INFO L82 PathProgramCache]: Analyzing trace with hash 733525566, now seen corresponding path program 1 times [2020-12-22 10:14:59,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:59,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396155686] [2020-12-22 10:14:59,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:59,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:59,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:14:59,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396155686] [2020-12-22 10:14:59,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:59,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:14:59,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454006447] [2020-12-22 10:14:59,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:14:59,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:59,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:14:59,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:14:59,837 INFO L87 Difference]: Start difference. First operand 2770 states and 4334 transitions. Second operand 3 states. [2020-12-22 10:14:59,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:59,919 INFO L93 Difference]: Finished difference Result 3638 states and 5704 transitions. [2020-12-22 10:14:59,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:14:59,920 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:14:59,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:59,940 INFO L225 Difference]: With dead ends: 3638 [2020-12-22 10:14:59,940 INFO L226 Difference]: Without dead ends: 3180 [2020-12-22 10:14:59,946 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 10:14:59,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3180 states. [2020-12-22 10:15:00,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3180 to 3178. [2020-12-22 10:15:00,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3178 states. [2020-12-22 10:15:00,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3178 states to 3178 states and 4970 transitions. [2020-12-22 10:15:00,049 INFO L78 Accepts]: Start accepts. Automaton has 3178 states and 4970 transitions. Word has length 91 [2020-12-22 10:15:00,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:15:00,049 INFO L481 AbstractCegarLoop]: Abstraction has 3178 states and 4970 transitions. [2020-12-22 10:15:00,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:15:00,049 INFO L276 IsEmpty]: Start isEmpty. Operand 3178 states and 4970 transitions. [2020-12-22 10:15:00,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:15:00,051 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:00,051 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 10:15:00,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:15:00,051 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:00,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:00,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1206505292, now seen corresponding path program 1 times [2020-12-22 10:15:00,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:00,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772970256] [2020-12-22 10:15:00,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:00,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:00,164 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 10:15:00,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772970256] [2020-12-22 10:15:00,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:00,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:15:00,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088083419] [2020-12-22 10:15:00,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:15:00,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:00,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:15:00,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:15:00,166 INFO L87 Difference]: Start difference. First operand 3178 states and 4970 transitions. Second operand 3 states. [2020-12-22 10:15:00,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:15:00,379 INFO L93 Difference]: Finished difference Result 4814 states and 7532 transitions. [2020-12-22 10:15:00,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:15:00,380 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:15:00,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:15:00,404 INFO L225 Difference]: With dead ends: 4814 [2020-12-22 10:15:00,405 INFO L226 Difference]: Without dead ends: 3948 [2020-12-22 10:15:00,409 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 10:15:00,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3948 states. [2020-12-22 10:15:00,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3948 to 3946. [2020-12-22 10:15:00,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3946 states. [2020-12-22 10:15:00,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3946 states to 3946 states and 6154 transitions. [2020-12-22 10:15:00,598 INFO L78 Accepts]: Start accepts. Automaton has 3946 states and 6154 transitions. Word has length 91 [2020-12-22 10:15:00,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:15:00,599 INFO L481 AbstractCegarLoop]: Abstraction has 3946 states and 6154 transitions. [2020-12-22 10:15:00,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:15:00,599 INFO L276 IsEmpty]: Start isEmpty. Operand 3946 states and 6154 transitions. [2020-12-22 10:15:00,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:15:00,600 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:00,600 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 10:15:00,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:15:00,601 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:00,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:00,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1494177322, now seen corresponding path program 1 times [2020-12-22 10:15:00,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:00,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037593453] [2020-12-22 10:15:00,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:00,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:00,793 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 10:15:00,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037593453] [2020-12-22 10:15:00,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:00,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:15:00,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197740547] [2020-12-22 10:15:00,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:15:00,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:00,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:15:00,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:15:00,797 INFO L87 Difference]: Start difference. First operand 3946 states and 6154 transitions. Second operand 9 states. [2020-12-22 10:15:02,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:15:02,308 INFO L93 Difference]: Finished difference Result 26822 states and 41784 transitions. [2020-12-22 10:15:02,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 10:15:02,309 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 91 [2020-12-22 10:15:02,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:15:02,410 INFO L225 Difference]: With dead ends: 26822 [2020-12-22 10:15:02,410 INFO L226 Difference]: Without dead ends: 25188 [2020-12-22 10:15:02,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:15:02,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25188 states. [2020-12-22 10:15:02,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25188 to 5578. [2020-12-22 10:15:02,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5578 states. [2020-12-22 10:15:02,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5578 states to 5578 states and 8634 transitions. [2020-12-22 10:15:02,934 INFO L78 Accepts]: Start accepts. Automaton has 5578 states and 8634 transitions. Word has length 91 [2020-12-22 10:15:02,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:15:02,935 INFO L481 AbstractCegarLoop]: Abstraction has 5578 states and 8634 transitions. [2020-12-22 10:15:02,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:15:02,935 INFO L276 IsEmpty]: Start isEmpty. Operand 5578 states and 8634 transitions. [2020-12-22 10:15:02,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:15:02,936 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:02,936 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 10:15:02,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:15:02,936 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:02,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:02,937 INFO L82 PathProgramCache]: Analyzing trace with hash -30360326, now seen corresponding path program 1 times [2020-12-22 10:15:02,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:02,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464119164] [2020-12-22 10:15:02,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:02,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:03,008 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 10:15:03,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464119164] [2020-12-22 10:15:03,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:03,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:15:03,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039510898] [2020-12-22 10:15:03,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:15:03,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:03,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:15:03,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:15:03,011 INFO L87 Difference]: Start difference. First operand 5578 states and 8634 transitions. Second operand 3 states. [2020-12-22 10:15:03,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:15:03,332 INFO L93 Difference]: Finished difference Result 10400 states and 16046 transitions. [2020-12-22 10:15:03,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:15:03,332 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:15:03,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:15:03,352 INFO L225 Difference]: With dead ends: 10400 [2020-12-22 10:15:03,352 INFO L226 Difference]: Without dead ends: 7134 [2020-12-22 10:15:03,360 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 10:15:03,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7134 states. [2020-12-22 10:15:03,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7134 to 7132. [2020-12-22 10:15:03,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7132 states. [2020-12-22 10:15:03,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7132 states to 7132 states and 10972 transitions. [2020-12-22 10:15:03,863 INFO L78 Accepts]: Start accepts. Automaton has 7132 states and 10972 transitions. Word has length 93 [2020-12-22 10:15:03,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:15:03,863 INFO L481 AbstractCegarLoop]: Abstraction has 7132 states and 10972 transitions. [2020-12-22 10:15:03,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:15:03,863 INFO L276 IsEmpty]: Start isEmpty. Operand 7132 states and 10972 transitions. [2020-12-22 10:15:03,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:15:03,865 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:03,865 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 10:15:03,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:15:03,865 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:03,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:03,866 INFO L82 PathProgramCache]: Analyzing trace with hash 36133186, now seen corresponding path program 1 times [2020-12-22 10:15:03,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:03,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716647827] [2020-12-22 10:15:03,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:03,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:04,191 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 10:15:04,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716647827] [2020-12-22 10:15:04,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:04,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:15:04,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838253021] [2020-12-22 10:15:04,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:15:04,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:04,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:15:04,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:15:04,194 INFO L87 Difference]: Start difference. First operand 7132 states and 10972 transitions. Second operand 9 states. [2020-12-22 10:15:04,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:15:04,981 INFO L93 Difference]: Finished difference Result 11952 states and 18334 transitions. [2020-12-22 10:15:04,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:15:04,982 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 93 [2020-12-22 10:15:04,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:15:04,998 INFO L225 Difference]: With dead ends: 11952 [2020-12-22 10:15:04,998 INFO L226 Difference]: Without dead ends: 7134 [2020-12-22 10:15:05,007 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 10:15:05,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7134 states. [2020-12-22 10:15:05,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7134 to 7132. [2020-12-22 10:15:05,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7132 states. [2020-12-22 10:15:05,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7132 states to 7132 states and 10924 transitions. [2020-12-22 10:15:05,371 INFO L78 Accepts]: Start accepts. Automaton has 7132 states and 10924 transitions. Word has length 93 [2020-12-22 10:15:05,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:15:05,372 INFO L481 AbstractCegarLoop]: Abstraction has 7132 states and 10924 transitions. [2020-12-22 10:15:05,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:15:05,372 INFO L276 IsEmpty]: Start isEmpty. Operand 7132 states and 10924 transitions. [2020-12-22 10:15:05,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:15:05,373 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:05,373 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 10:15:05,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:15:05,374 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:05,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:05,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1825047262, now seen corresponding path program 1 times [2020-12-22 10:15:05,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:05,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693421701] [2020-12-22 10:15:05,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:05,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:05,448 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 10:15:05,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693421701] [2020-12-22 10:15:05,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:05,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:15:05,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937161626] [2020-12-22 10:15:05,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:15:05,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:05,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:15:05,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:15:05,451 INFO L87 Difference]: Start difference. First operand 7132 states and 10924 transitions. Second operand 3 states. [2020-12-22 10:15:05,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:15:05,985 INFO L93 Difference]: Finished difference Result 16192 states and 24590 transitions. [2020-12-22 10:15:05,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:15:05,986 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:15:05,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:15:06,013 INFO L225 Difference]: With dead ends: 16192 [2020-12-22 10:15:06,014 INFO L226 Difference]: Without dead ends: 11374 [2020-12-22 10:15:06,025 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 10:15:06,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11374 states. [2020-12-22 10:15:06,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11374 to 11372. [2020-12-22 10:15:06,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11372 states. [2020-12-22 10:15:06,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11372 states to 11372 states and 17180 transitions. [2020-12-22 10:15:06,764 INFO L78 Accepts]: Start accepts. Automaton has 11372 states and 17180 transitions. Word has length 93 [2020-12-22 10:15:06,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:15:06,764 INFO L481 AbstractCegarLoop]: Abstraction has 11372 states and 17180 transitions. [2020-12-22 10:15:06,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:15:06,764 INFO L276 IsEmpty]: Start isEmpty. Operand 11372 states and 17180 transitions. [2020-12-22 10:15:06,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:15:06,765 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:06,766 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:15:06,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:15:06,766 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:06,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:06,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1222412418, now seen corresponding path program 1 times [2020-12-22 10:15:06,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:06,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969058979] [2020-12-22 10:15:06,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:06,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:06,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:15:06,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969058979] [2020-12-22 10:15:06,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:06,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:15:06,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480316834] [2020-12-22 10:15:06,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:15:06,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:06,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:15:06,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:15:06,843 INFO L87 Difference]: Start difference. First operand 11372 states and 17180 transitions. Second operand 3 states. [2020-12-22 10:15:07,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:15:07,628 INFO L93 Difference]: Finished difference Result 28336 states and 42398 transitions. [2020-12-22 10:15:07,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:15:07,628 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:15:07,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:15:07,669 INFO L225 Difference]: With dead ends: 28336 [2020-12-22 10:15:07,669 INFO L226 Difference]: Without dead ends: 19278 [2020-12-22 10:15:07,685 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 10:15:07,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19278 states. [2020-12-22 10:15:08,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19278 to 19276. [2020-12-22 10:15:08,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19276 states. [2020-12-22 10:15:08,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19276 states to 19276 states and 28636 transitions. [2020-12-22 10:15:08,957 INFO L78 Accepts]: Start accepts. Automaton has 19276 states and 28636 transitions. Word has length 93 [2020-12-22 10:15:08,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:15:08,957 INFO L481 AbstractCegarLoop]: Abstraction has 19276 states and 28636 transitions. [2020-12-22 10:15:08,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:15:08,957 INFO L276 IsEmpty]: Start isEmpty. Operand 19276 states and 28636 transitions. [2020-12-22 10:15:08,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:15:08,958 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:08,959 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 10:15:08,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:15:08,959 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:08,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:08,960 INFO L82 PathProgramCache]: Analyzing trace with hash 705405902, now seen corresponding path program 1 times [2020-12-22 10:15:08,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:08,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363176096] [2020-12-22 10:15:08,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:08,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:09,073 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 10:15:09,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363176096] [2020-12-22 10:15:09,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:09,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:15:09,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391682065] [2020-12-22 10:15:09,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:15:09,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:09,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:15:09,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:15:09,076 INFO L87 Difference]: Start difference. First operand 19276 states and 28636 transitions. Second operand 6 states. [2020-12-22 10:15:10,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:15:10,541 INFO L93 Difference]: Finished difference Result 36238 states and 53661 transitions. [2020-12-22 10:15:10,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:15:10,542 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 94 [2020-12-22 10:15:10,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:15:10,576 INFO L225 Difference]: With dead ends: 36238 [2020-12-22 10:15:10,576 INFO L226 Difference]: Without dead ends: 19276 [2020-12-22 10:15:10,599 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 10:15:10,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19276 states. [2020-12-22 10:15:11,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19276 to 19276. [2020-12-22 10:15:11,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19276 states. [2020-12-22 10:15:11,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19276 states to 19276 states and 28380 transitions. [2020-12-22 10:15:11,828 INFO L78 Accepts]: Start accepts. Automaton has 19276 states and 28380 transitions. Word has length 94 [2020-12-22 10:15:11,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:15:11,828 INFO L481 AbstractCegarLoop]: Abstraction has 19276 states and 28380 transitions. [2020-12-22 10:15:11,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:15:11,828 INFO L276 IsEmpty]: Start isEmpty. Operand 19276 states and 28380 transitions. [2020-12-22 10:15:11,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:15:11,829 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:11,829 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:15:11,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:15:11,830 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:11,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:11,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1549411404, now seen corresponding path program 1 times [2020-12-22 10:15:11,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:11,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524641123] [2020-12-22 10:15:11,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:11,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:11,940 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 10:15:11,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524641123] [2020-12-22 10:15:11,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:11,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:15:11,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763512963] [2020-12-22 10:15:11,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:15:11,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:11,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:15:11,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:15:11,942 INFO L87 Difference]: Start difference. First operand 19276 states and 28380 transitions. Second operand 6 states. [2020-12-22 10:15:13,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:15:13,475 INFO L93 Difference]: Finished difference Result 36238 states and 53149 transitions. [2020-12-22 10:15:13,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:15:13,475 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 94 [2020-12-22 10:15:13,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:15:13,507 INFO L225 Difference]: With dead ends: 36238 [2020-12-22 10:15:13,508 INFO L226 Difference]: Without dead ends: 19276 [2020-12-22 10:15:13,529 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 10:15:13,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19276 states. [2020-12-22 10:15:14,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19276 to 19276. [2020-12-22 10:15:14,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19276 states. [2020-12-22 10:15:14,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19276 states to 19276 states and 28188 transitions. [2020-12-22 10:15:14,995 INFO L78 Accepts]: Start accepts. Automaton has 19276 states and 28188 transitions. Word has length 94 [2020-12-22 10:15:14,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:15:14,995 INFO L481 AbstractCegarLoop]: Abstraction has 19276 states and 28188 transitions. [2020-12-22 10:15:14,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:15:14,996 INFO L276 IsEmpty]: Start isEmpty. Operand 19276 states and 28188 transitions. [2020-12-22 10:15:14,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:15:14,996 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:14,997 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 10:15:14,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:15:14,997 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:14,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:14,998 INFO L82 PathProgramCache]: Analyzing trace with hash 847811530, now seen corresponding path program 1 times [2020-12-22 10:15:14,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:14,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751097096] [2020-12-22 10:15:14,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:15,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:15,132 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 10:15:15,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751097096] [2020-12-22 10:15:15,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:15,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:15:15,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776129548] [2020-12-22 10:15:15,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:15:15,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:15,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:15:15,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:15:15,138 INFO L87 Difference]: Start difference. First operand 19276 states and 28188 transitions. Second operand 8 states. [2020-12-22 10:15:17,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:15:17,809 INFO L93 Difference]: Finished difference Result 33775 states and 48838 transitions. [2020-12-22 10:15:17,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:15:17,809 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 94 [2020-12-22 10:15:17,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:15:17,847 INFO L225 Difference]: With dead ends: 33775 [2020-12-22 10:15:17,847 INFO L226 Difference]: Without dead ends: 33773 [2020-12-22 10:15:17,855 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 10:15:17,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33773 states. [2020-12-22 10:15:19,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33773 to 20044. [2020-12-22 10:15:19,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20044 states. [2020-12-22 10:15:19,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20044 states to 20044 states and 28892 transitions. [2020-12-22 10:15:19,333 INFO L78 Accepts]: Start accepts. Automaton has 20044 states and 28892 transitions. Word has length 94 [2020-12-22 10:15:19,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:15:19,334 INFO L481 AbstractCegarLoop]: Abstraction has 20044 states and 28892 transitions. [2020-12-22 10:15:19,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:15:19,334 INFO L276 IsEmpty]: Start isEmpty. Operand 20044 states and 28892 transitions. [2020-12-22 10:15:19,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:15:19,346 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:19,347 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 10:15:19,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:15:19,347 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:19,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:19,348 INFO L82 PathProgramCache]: Analyzing trace with hash 101873069, now seen corresponding path program 1 times [2020-12-22 10:15:19,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:19,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881438280] [2020-12-22 10:15:19,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:19,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:19,526 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 10:15:19,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881438280] [2020-12-22 10:15:19,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:19,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:15:19,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571255485] [2020-12-22 10:15:19,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:15:19,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:19,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:15:19,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:15:19,529 INFO L87 Difference]: Start difference. First operand 20044 states and 28892 transitions. Second operand 9 states. [2020-12-22 10:15:27,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:15:27,395 INFO L93 Difference]: Finished difference Result 147612 states and 210628 transitions. [2020-12-22 10:15:27,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:15:27,395 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:15:27,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:15:27,556 INFO L225 Difference]: With dead ends: 147612 [2020-12-22 10:15:27,556 INFO L226 Difference]: Without dead ends: 129882 [2020-12-22 10:15:27,598 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 10:15:27,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129882 states. [2020-12-22 10:15:31,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129882 to 37772. [2020-12-22 10:15:31,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37772 states. [2020-12-22 10:15:31,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37772 states to 37772 states and 53980 transitions. [2020-12-22 10:15:31,141 INFO L78 Accepts]: Start accepts. Automaton has 37772 states and 53980 transitions. Word has length 130 [2020-12-22 10:15:31,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:15:31,141 INFO L481 AbstractCegarLoop]: Abstraction has 37772 states and 53980 transitions. [2020-12-22 10:15:31,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:15:31,141 INFO L276 IsEmpty]: Start isEmpty. Operand 37772 states and 53980 transitions. [2020-12-22 10:15:31,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:15:31,159 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:31,159 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 10:15:31,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:15:31,160 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:31,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:31,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1349380685, now seen corresponding path program 1 times [2020-12-22 10:15:31,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:31,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858395209] [2020-12-22 10:15:31,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:31,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:31,376 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 10:15:31,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858395209] [2020-12-22 10:15:31,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:31,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:15:31,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593654909] [2020-12-22 10:15:31,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:15:31,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:31,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:15:31,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:15:31,379 INFO L87 Difference]: Start difference. First operand 37772 states and 53980 transitions. Second operand 9 states. [2020-12-22 10:15:41,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:15:41,544 INFO L93 Difference]: Finished difference Result 165340 states and 235716 transitions. [2020-12-22 10:15:41,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:15:41,545 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:15:41,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:15:41,733 INFO L225 Difference]: With dead ends: 165340 [2020-12-22 10:15:41,733 INFO L226 Difference]: Without dead ends: 147610 [2020-12-22 10:15:41,949 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 10:15:42,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147610 states. [2020-12-22 10:15:47,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147610 to 64396. [2020-12-22 10:15:47,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64396 states. [2020-12-22 10:15:47,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64396 states to 64396 states and 91452 transitions. [2020-12-22 10:15:47,536 INFO L78 Accepts]: Start accepts. Automaton has 64396 states and 91452 transitions. Word has length 130 [2020-12-22 10:15:47,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:15:47,536 INFO L481 AbstractCegarLoop]: Abstraction has 64396 states and 91452 transitions. [2020-12-22 10:15:47,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:15:47,537 INFO L276 IsEmpty]: Start isEmpty. Operand 64396 states and 91452 transitions. [2020-12-22 10:15:47,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:15:47,553 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:47,553 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 10:15:47,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:15:47,554 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:47,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:47,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1476153629, now seen corresponding path program 1 times [2020-12-22 10:15:47,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:47,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486261886] [2020-12-22 10:15:47,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:47,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:47,790 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 10:15:47,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486261886] [2020-12-22 10:15:47,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:47,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:15:47,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466258819] [2020-12-22 10:15:47,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:15:47,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:47,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:15:47,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:15:47,793 INFO L87 Difference]: Start difference. First operand 64396 states and 91452 transitions. Second operand 9 states. [2020-12-22 10:15:59,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:15:59,904 INFO L93 Difference]: Finished difference Result 183068 states and 260804 transitions. [2020-12-22 10:15:59,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:15:59,905 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:15:59,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:00,116 INFO L225 Difference]: With dead ends: 183068 [2020-12-22 10:16:00,116 INFO L226 Difference]: Without dead ends: 165338 [2020-12-22 10:16:00,167 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 10:16:00,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165338 states. [2020-12-22 10:16:07,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165338 to 82124. [2020-12-22 10:16:07,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82124 states. [2020-12-22 10:16:07,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82124 states to 82124 states and 116540 transitions. [2020-12-22 10:16:07,557 INFO L78 Accepts]: Start accepts. Automaton has 82124 states and 116540 transitions. Word has length 130 [2020-12-22 10:16:07,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:07,558 INFO L481 AbstractCegarLoop]: Abstraction has 82124 states and 116540 transitions. [2020-12-22 10:16:07,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:16:07,558 INFO L276 IsEmpty]: Start isEmpty. Operand 82124 states and 116540 transitions. [2020-12-22 10:16:07,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:16:07,574 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:07,574 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 10:16:07,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:16:07,575 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:07,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:07,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1583354627, now seen corresponding path program 1 times [2020-12-22 10:16:07,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:07,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294390493] [2020-12-22 10:16:07,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:07,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:07,777 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 10:16:07,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294390493] [2020-12-22 10:16:07,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:07,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:16:07,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947862574] [2020-12-22 10:16:07,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:16:07,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:07,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:16:07,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:16:07,783 INFO L87 Difference]: Start difference. First operand 82124 states and 116540 transitions. Second operand 9 states. [2020-12-22 10:16:22,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:22,533 INFO L93 Difference]: Finished difference Result 200796 states and 285892 transitions. [2020-12-22 10:16:22,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:16:22,534 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:16:22,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:22,951 INFO L225 Difference]: With dead ends: 200796 [2020-12-22 10:16:22,952 INFO L226 Difference]: Without dead ends: 183066 [2020-12-22 10:16:23,035 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 10:16:23,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183066 states. [2020-12-22 10:16:32,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183066 to 99852. [2020-12-22 10:16:32,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99852 states. [2020-12-22 10:16:32,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99852 states to 99852 states and 141628 transitions. [2020-12-22 10:16:32,640 INFO L78 Accepts]: Start accepts. Automaton has 99852 states and 141628 transitions. Word has length 130 [2020-12-22 10:16:32,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:32,641 INFO L481 AbstractCegarLoop]: Abstraction has 99852 states and 141628 transitions. [2020-12-22 10:16:32,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:16:32,641 INFO L276 IsEmpty]: Start isEmpty. Operand 99852 states and 141628 transitions. [2020-12-22 10:16:32,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:16:32,663 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:32,664 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 10:16:32,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 10:16:32,664 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:32,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:32,665 INFO L82 PathProgramCache]: Analyzing trace with hash 162359075, now seen corresponding path program 1 times [2020-12-22 10:16:32,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:32,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937158471] [2020-12-22 10:16:32,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:32,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:32,916 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 10:16:32,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937158471] [2020-12-22 10:16:32,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:32,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:16:32,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481242541] [2020-12-22 10:16:32,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:16:32,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:32,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:16:32,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:16:32,921 INFO L87 Difference]: Start difference. First operand 99852 states and 141628 transitions. Second operand 9 states. [2020-12-22 10:16:50,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:50,086 INFO L93 Difference]: Finished difference Result 218524 states and 310980 transitions. [2020-12-22 10:16:50,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:16:50,087 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:16:50,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:50,558 INFO L225 Difference]: With dead ends: 218524 [2020-12-22 10:16:50,558 INFO L226 Difference]: Without dead ends: 200794 [2020-12-22 10:16:50,611 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 10:16:50,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200794 states. [2020-12-22 10:17:01,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200794 to 117580. [2020-12-22 10:17:01,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117580 states. [2020-12-22 10:17:01,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117580 states to 117580 states and 166716 transitions. [2020-12-22 10:17:01,985 INFO L78 Accepts]: Start accepts. Automaton has 117580 states and 166716 transitions. Word has length 130 [2020-12-22 10:17:01,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:17:01,985 INFO L481 AbstractCegarLoop]: Abstraction has 117580 states and 166716 transitions. [2020-12-22 10:17:01,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:17:01,985 INFO L276 IsEmpty]: Start isEmpty. Operand 117580 states and 166716 transitions. [2020-12-22 10:17:01,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:17:02,000 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:17:02,000 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 10:17:02,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 10:17:02,000 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:17:02,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:17:02,001 INFO L82 PathProgramCache]: Analyzing trace with hash -403461309, now seen corresponding path program 1 times [2020-12-22 10:17:02,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:17:02,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984055799] [2020-12-22 10:17:02,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:17:02,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:17:02,188 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 10:17:02,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984055799] [2020-12-22 10:17:02,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:17:02,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:17:02,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129407762] [2020-12-22 10:17:02,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:17:02,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:17:02,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:17:02,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:17:02,190 INFO L87 Difference]: Start difference. First operand 117580 states and 166716 transitions. Second operand 9 states. [2020-12-22 10:17:02,456 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-12-22 10:17:23,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:17:23,159 INFO L93 Difference]: Finished difference Result 236252 states and 336068 transitions. [2020-12-22 10:17:23,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:17:23,165 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:17:23,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:17:23,660 INFO L225 Difference]: With dead ends: 236252 [2020-12-22 10:17:23,660 INFO L226 Difference]: Without dead ends: 218522 [2020-12-22 10:17:23,724 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:17:23,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218522 states. [2020-12-22 10:17:38,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218522 to 135308. [2020-12-22 10:17:38,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135308 states. [2020-12-22 10:17:38,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135308 states to 135308 states and 191804 transitions. [2020-12-22 10:17:38,550 INFO L78 Accepts]: Start accepts. Automaton has 135308 states and 191804 transitions. Word has length 130 [2020-12-22 10:17:38,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:17:38,551 INFO L481 AbstractCegarLoop]: Abstraction has 135308 states and 191804 transitions. [2020-12-22 10:17:38,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:17:38,551 INFO L276 IsEmpty]: Start isEmpty. Operand 135308 states and 191804 transitions. [2020-12-22 10:17:38,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:17:38,569 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:17:38,570 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 10:17:38,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 10:17:38,570 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:17:38,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:17:38,571 INFO L82 PathProgramCache]: Analyzing trace with hash -214245533, now seen corresponding path program 1 times [2020-12-22 10:17:38,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:17:38,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776778854] [2020-12-22 10:17:38,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:17:38,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:17:38,757 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:17:38,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776778854] [2020-12-22 10:17:38,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:17:38,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:17:38,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781004025] [2020-12-22 10:17:38,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:17:38,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:17:38,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:17:38,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:17:38,763 INFO L87 Difference]: Start difference. First operand 135308 states and 191804 transitions. Second operand 9 states. [2020-12-22 10:18:02,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:18:02,924 INFO L93 Difference]: Finished difference Result 243100 states and 345924 transitions. [2020-12-22 10:18:02,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:18:02,925 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:18:02,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:18:03,460 INFO L225 Difference]: With dead ends: 243100 [2020-12-22 10:18:03,460 INFO L226 Difference]: Without dead ends: 230810 [2020-12-22 10:18:03,509 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 10:18:03,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230810 states.