/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.8.1.ufo.UNBOUNDED.pals+Problem12_label02.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:20:11,160 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:20:11,164 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:20:11,222 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:20:11,223 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:20:11,227 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:20:11,231 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:20:11,241 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:20:11,244 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:20:11,250 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:20:11,251 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:20:11,253 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:20:11,253 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:20:11,256 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:20:11,258 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:20:11,260 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:20:11,261 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:20:11,264 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:20:11,279 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:20:11,287 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:20:11,288 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:20:11,290 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:20:11,291 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:20:11,294 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:20:11,302 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:20:11,312 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:20:11,313 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:20:11,313 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:20:11,314 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:20:11,365 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:20:11,366 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:20:11,370 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:20:11,370 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:20:11,370 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:20:11,370 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:20:11,371 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:20:11,371 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:20:11,371 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:20:11,371 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:20:11,372 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:20:11,373 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:20:11,373 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:20:11,373 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:20:11,373 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:20:11,373 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:20:11,374 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:20:11,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:20:11,374 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:20:11,374 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:20:11,374 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:20:11,375 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:20:11,375 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:20:11,375 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:20:11,375 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:20:11,375 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:20:11,816 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:20:11,852 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:20:11,855 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:20:11,856 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:20:11,857 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:20:11,858 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.8.1.ufo.UNBOUNDED.pals+Problem12_label02.c [2020-12-22 10:20:11,952 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/889a9cc2f/06aa9ef43c324bc28c9b1615e25f7aff/FLAG223d75436 [2020-12-22 10:20:13,069 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:20:13,070 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.8.1.ufo.UNBOUNDED.pals+Problem12_label02.c [2020-12-22 10:20:13,111 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/889a9cc2f/06aa9ef43c324bc28c9b1615e25f7aff/FLAG223d75436 [2020-12-22 10:20:13,564 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/889a9cc2f/06aa9ef43c324bc28c9b1615e25f7aff [2020-12-22 10:20:13,567 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:20:13,570 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:20:13,572 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:20:13,572 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:20:13,577 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:20:13,579 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:20:13" (1/1) ... [2020-12-22 10:20:13,581 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@666bd3e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:20:13, skipping insertion in model container [2020-12-22 10:20:13,582 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:20:13" (1/1) ... [2020-12-22 10:20:13,592 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:20:13,798 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:20:14,257 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.8.1.ufo.UNBOUNDED.pals+Problem12_label02.c[26912,26925] [2020-12-22 10:20:14,343 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.8.1.ufo.UNBOUNDED.pals+Problem12_label02.c[33959,33972] [2020-12-22 10:20:15,233 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:20:15,251 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:20:15,334 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.8.1.ufo.UNBOUNDED.pals+Problem12_label02.c[26912,26925] [2020-12-22 10:20:15,403 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.8.1.ufo.UNBOUNDED.pals+Problem12_label02.c[33959,33972] [2020-12-22 10:20:16,015 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:20:16,065 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:20:16,066 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:20:16 WrapperNode [2020-12-22 10:20:16,066 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:20:16,068 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:20:16,068 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:20:16,068 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:20:16,077 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:20:16" (1/1) ... [2020-12-22 10:20:16,154 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:20:16" (1/1) ... [2020-12-22 10:20:16,505 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:20:16,508 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:20:16,508 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:20:16,508 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:20:16,518 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:20:16" (1/1) ... [2020-12-22 10:20:16,518 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:20:16" (1/1) ... [2020-12-22 10:20:16,602 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:20:16" (1/1) ... [2020-12-22 10:20:16,603 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:20:16" (1/1) ... [2020-12-22 10:20:16,876 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:20:16" (1/1) ... [2020-12-22 10:20:16,923 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:20:16" (1/1) ... [2020-12-22 10:20:17,102 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:20:16" (1/1) ... [2020-12-22 10:20:17,165 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:20:17,167 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:20:17,167 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:20:17,167 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:20:17,168 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:20:16" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:20:17,278 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:20:17,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:20:17,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:20:17,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:20:23,074 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:20:23,075 INFO L299 CfgBuilder]: Removed 42 assume(true) statements. [2020-12-22 10:20:23,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:20:23 BoogieIcfgContainer [2020-12-22 10:20:23,079 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:20:23,081 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:20:23,081 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:20:23,084 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:20:23,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:20:13" (1/3) ... [2020-12-22 10:20:23,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@253572a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:20:23, skipping insertion in model container [2020-12-22 10:20:23,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:20:16" (2/3) ... [2020-12-22 10:20:23,086 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@253572a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:20:23, skipping insertion in model container [2020-12-22 10:20:23,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:20:23" (3/3) ... [2020-12-22 10:20:23,088 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.8.1.ufo.UNBOUNDED.pals+Problem12_label02.c [2020-12-22 10:20:23,094 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:20:23,109 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:20:23,128 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:20:23,162 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:20:23,163 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:20:23,163 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:20:23,163 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:20:23,163 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:20:23,163 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:20:23,164 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:20:23,164 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:20:23,201 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states. [2020-12-22 10:20:23,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 10:20:23,215 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:23,216 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] [2020-12-22 10:20:23,216 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:23,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:23,223 INFO L82 PathProgramCache]: Analyzing trace with hash -805214309, now seen corresponding path program 1 times [2020-12-22 10:20:23,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:23,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253114153] [2020-12-22 10:20:23,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:23,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:23,496 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 10:20:23,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253114153] [2020-12-22 10:20:23,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:23,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:20:23,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860256662] [2020-12-22 10:20:23,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 10:20:23,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:23,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 10:20:23,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:20:23,526 INFO L87 Difference]: Start difference. First operand 964 states. Second operand 2 states. [2020-12-22 10:20:23,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:23,612 INFO L93 Difference]: Finished difference Result 1859 states and 3514 transitions. [2020-12-22 10:20:23,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 10:20:23,614 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 46 [2020-12-22 10:20:23,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:23,639 INFO L225 Difference]: With dead ends: 1859 [2020-12-22 10:20:23,640 INFO L226 Difference]: Without dead ends: 898 [2020-12-22 10:20:23,648 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 10:20:23,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2020-12-22 10:20:23,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 898. [2020-12-22 10:20:23,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 898 states. [2020-12-22 10:20:23,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1690 transitions. [2020-12-22 10:20:23,743 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1690 transitions. Word has length 46 [2020-12-22 10:20:23,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:23,744 INFO L481 AbstractCegarLoop]: Abstraction has 898 states and 1690 transitions. [2020-12-22 10:20:23,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 10:20:23,744 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1690 transitions. [2020-12-22 10:20:23,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 10:20:23,747 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:23,747 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] [2020-12-22 10:20:23,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:20:23,748 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:23,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:23,749 INFO L82 PathProgramCache]: Analyzing trace with hash 2117945689, now seen corresponding path program 1 times [2020-12-22 10:20:23,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:23,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251280971] [2020-12-22 10:20:23,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:23,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:23,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:20:23,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251280971] [2020-12-22 10:20:23,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:23,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:20:23,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491856575] [2020-12-22 10:20:23,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:20:23,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:23,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:20:23,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:20:23,922 INFO L87 Difference]: Start difference. First operand 898 states and 1690 transitions. Second operand 5 states. [2020-12-22 10:20:24,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:24,095 INFO L93 Difference]: Finished difference Result 979 states and 1817 transitions. [2020-12-22 10:20:24,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:20:24,096 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2020-12-22 10:20:24,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:24,103 INFO L225 Difference]: With dead ends: 979 [2020-12-22 10:20:24,103 INFO L226 Difference]: Without dead ends: 898 [2020-12-22 10:20:24,105 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 10:20:24,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2020-12-22 10:20:24,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 898. [2020-12-22 10:20:24,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 898 states. [2020-12-22 10:20:24,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1629 transitions. [2020-12-22 10:20:24,130 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1629 transitions. Word has length 46 [2020-12-22 10:20:24,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:24,130 INFO L481 AbstractCegarLoop]: Abstraction has 898 states and 1629 transitions. [2020-12-22 10:20:24,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:20:24,131 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1629 transitions. [2020-12-22 10:20:24,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 10:20:24,133 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:24,134 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:20:24,134 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:20:24,134 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:24,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:24,135 INFO L82 PathProgramCache]: Analyzing trace with hash 388486346, now seen corresponding path program 1 times [2020-12-22 10:20:24,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:24,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47430387] [2020-12-22 10:20:24,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:24,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:24,413 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 10:20:24,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47430387] [2020-12-22 10:20:24,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:24,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:20:24,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299575152] [2020-12-22 10:20:24,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:20:24,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:24,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:20:24,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:20:24,416 INFO L87 Difference]: Start difference. First operand 898 states and 1629 transitions. Second operand 4 states. [2020-12-22 10:20:35,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:35,544 INFO L93 Difference]: Finished difference Result 3153 states and 5938 transitions. [2020-12-22 10:20:35,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:20:35,545 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2020-12-22 10:20:35,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:35,560 INFO L225 Difference]: With dead ends: 3153 [2020-12-22 10:20:35,560 INFO L226 Difference]: Without dead ends: 2400 [2020-12-22 10:20:35,562 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 10:20:35,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2020-12-22 10:20:35,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 2400. [2020-12-22 10:20:35,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2400 states. [2020-12-22 10:20:35,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 3605 transitions. [2020-12-22 10:20:35,628 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 3605 transitions. Word has length 63 [2020-12-22 10:20:35,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:35,629 INFO L481 AbstractCegarLoop]: Abstraction has 2400 states and 3605 transitions. [2020-12-22 10:20:35,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:20:35,629 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 3605 transitions. [2020-12-22 10:20:35,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:20:35,633 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:35,633 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:20:35,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:20:35,633 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:35,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:35,634 INFO L82 PathProgramCache]: Analyzing trace with hash 211182729, now seen corresponding path program 1 times [2020-12-22 10:20:35,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:35,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488517066] [2020-12-22 10:20:35,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:35,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:35,823 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 10:20:35,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488517066] [2020-12-22 10:20:35,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:35,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:20:35,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551470208] [2020-12-22 10:20:35,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:20:35,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:35,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:20:35,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:20:35,830 INFO L87 Difference]: Start difference. First operand 2400 states and 3605 transitions. Second operand 3 states. [2020-12-22 10:20:35,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:35,899 INFO L93 Difference]: Finished difference Result 2548 states and 3841 transitions. [2020-12-22 10:20:35,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:20:35,900 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:20:35,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:35,918 INFO L225 Difference]: With dead ends: 2548 [2020-12-22 10:20:35,918 INFO L226 Difference]: Without dead ends: 2471 [2020-12-22 10:20:35,919 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 10:20:35,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2471 states. [2020-12-22 10:20:35,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2471 to 2469. [2020-12-22 10:20:35,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2469 states. [2020-12-22 10:20:35,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2469 states to 2469 states and 3716 transitions. [2020-12-22 10:20:35,985 INFO L78 Accepts]: Start accepts. Automaton has 2469 states and 3716 transitions. Word has length 106 [2020-12-22 10:20:35,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:35,986 INFO L481 AbstractCegarLoop]: Abstraction has 2469 states and 3716 transitions. [2020-12-22 10:20:35,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:20:35,987 INFO L276 IsEmpty]: Start isEmpty. Operand 2469 states and 3716 transitions. [2020-12-22 10:20:35,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:20:35,988 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:35,989 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:20:35,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:20:35,989 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:35,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:35,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1458691583, now seen corresponding path program 1 times [2020-12-22 10:20:35,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:35,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994526647] [2020-12-22 10:20:35,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:36,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:36,127 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 10:20:36,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994526647] [2020-12-22 10:20:36,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:36,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:20:36,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718862536] [2020-12-22 10:20:36,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:20:36,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:36,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:20:36,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:20:36,129 INFO L87 Difference]: Start difference. First operand 2469 states and 3716 transitions. Second operand 3 states. [2020-12-22 10:20:36,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:36,185 INFO L93 Difference]: Finished difference Result 2749 states and 4164 transitions. [2020-12-22 10:20:36,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:20:36,186 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:20:36,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:36,202 INFO L225 Difference]: With dead ends: 2749 [2020-12-22 10:20:36,202 INFO L226 Difference]: Without dead ends: 2603 [2020-12-22 10:20:36,204 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 10:20:36,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2603 states. [2020-12-22 10:20:36,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2603 to 2601. [2020-12-22 10:20:36,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2601 states. [2020-12-22 10:20:36,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2601 states to 2601 states and 3927 transitions. [2020-12-22 10:20:36,272 INFO L78 Accepts]: Start accepts. Automaton has 2601 states and 3927 transitions. Word has length 106 [2020-12-22 10:20:36,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:36,273 INFO L481 AbstractCegarLoop]: Abstraction has 2601 states and 3927 transitions. [2020-12-22 10:20:36,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:20:36,273 INFO L276 IsEmpty]: Start isEmpty. Operand 2601 states and 3927 transitions. [2020-12-22 10:20:36,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:20:36,275 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:36,275 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:20:36,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:20:36,276 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:36,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:36,276 INFO L82 PathProgramCache]: Analyzing trace with hash 717259381, now seen corresponding path program 1 times [2020-12-22 10:20:36,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:36,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883465402] [2020-12-22 10:20:36,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:36,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:36,411 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 10:20:36,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883465402] [2020-12-22 10:20:36,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:36,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:20:36,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243304896] [2020-12-22 10:20:36,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:20:36,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:36,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:20:36,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:20:36,417 INFO L87 Difference]: Start difference. First operand 2601 states and 3927 transitions. Second operand 3 states. [2020-12-22 10:20:36,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:36,501 INFO L93 Difference]: Finished difference Result 3133 states and 4777 transitions. [2020-12-22 10:20:36,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:20:36,502 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:20:36,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:36,523 INFO L225 Difference]: With dead ends: 3133 [2020-12-22 10:20:36,523 INFO L226 Difference]: Without dead ends: 2855 [2020-12-22 10:20:36,525 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 10:20:36,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2855 states. [2020-12-22 10:20:36,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2855 to 2853. [2020-12-22 10:20:36,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2853 states. [2020-12-22 10:20:36,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2853 states to 2853 states and 4327 transitions. [2020-12-22 10:20:36,629 INFO L78 Accepts]: Start accepts. Automaton has 2853 states and 4327 transitions. Word has length 106 [2020-12-22 10:20:36,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:36,631 INFO L481 AbstractCegarLoop]: Abstraction has 2853 states and 4327 transitions. [2020-12-22 10:20:36,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:20:36,631 INFO L276 IsEmpty]: Start isEmpty. Operand 2853 states and 4327 transitions. [2020-12-22 10:20:36,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:20:36,632 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:36,632 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:20:36,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:20:36,634 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:36,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:36,638 INFO L82 PathProgramCache]: Analyzing trace with hash -28323349, now seen corresponding path program 1 times [2020-12-22 10:20:36,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:36,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387172248] [2020-12-22 10:20:36,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:36,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:36,788 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 10:20:36,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387172248] [2020-12-22 10:20:36,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:36,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:20:36,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161274387] [2020-12-22 10:20:36,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:20:36,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:36,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:20:36,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:20:36,792 INFO L87 Difference]: Start difference. First operand 2853 states and 4327 transitions. Second operand 3 states. [2020-12-22 10:20:36,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:36,876 INFO L93 Difference]: Finished difference Result 3865 states and 5937 transitions. [2020-12-22 10:20:36,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:20:36,877 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:20:36,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:36,897 INFO L225 Difference]: With dead ends: 3865 [2020-12-22 10:20:36,897 INFO L226 Difference]: Without dead ends: 3335 [2020-12-22 10:20:36,904 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 10:20:36,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3335 states. [2020-12-22 10:20:37,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3335 to 3333. [2020-12-22 10:20:37,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3333 states. [2020-12-22 10:20:37,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3333 states to 3333 states and 5083 transitions. [2020-12-22 10:20:37,082 INFO L78 Accepts]: Start accepts. Automaton has 3333 states and 5083 transitions. Word has length 106 [2020-12-22 10:20:37,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:37,083 INFO L481 AbstractCegarLoop]: Abstraction has 3333 states and 5083 transitions. [2020-12-22 10:20:37,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:20:37,083 INFO L276 IsEmpty]: Start isEmpty. Operand 3333 states and 5083 transitions. [2020-12-22 10:20:37,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:20:37,084 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:37,084 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:20:37,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:20:37,085 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:37,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:37,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1968354207, now seen corresponding path program 1 times [2020-12-22 10:20:37,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:37,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578155985] [2020-12-22 10:20:37,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:37,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:37,206 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 10:20:37,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578155985] [2020-12-22 10:20:37,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:37,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:20:37,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625466912] [2020-12-22 10:20:37,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:20:37,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:37,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:20:37,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:20:37,209 INFO L87 Difference]: Start difference. First operand 3333 states and 5083 transitions. Second operand 3 states. [2020-12-22 10:20:37,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:37,320 INFO L93 Difference]: Finished difference Result 5257 states and 8125 transitions. [2020-12-22 10:20:37,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:20:37,321 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:20:37,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:37,343 INFO L225 Difference]: With dead ends: 5257 [2020-12-22 10:20:37,344 INFO L226 Difference]: Without dead ends: 4247 [2020-12-22 10:20:37,347 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 10:20:37,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4247 states. [2020-12-22 10:20:37,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4247 to 4245. [2020-12-22 10:20:37,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4245 states. [2020-12-22 10:20:37,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4245 states to 4245 states and 6507 transitions. [2020-12-22 10:20:37,504 INFO L78 Accepts]: Start accepts. Automaton has 4245 states and 6507 transitions. Word has length 106 [2020-12-22 10:20:37,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:37,504 INFO L481 AbstractCegarLoop]: Abstraction has 4245 states and 6507 transitions. [2020-12-22 10:20:37,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:20:37,505 INFO L276 IsEmpty]: Start isEmpty. Operand 4245 states and 6507 transitions. [2020-12-22 10:20:37,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:20:37,509 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:37,509 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:20:37,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:20:37,510 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:37,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:37,510 INFO L82 PathProgramCache]: Analyzing trace with hash 732328407, now seen corresponding path program 1 times [2020-12-22 10:20:37,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:37,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939224571] [2020-12-22 10:20:37,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:37,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:37,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:20:37,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939224571] [2020-12-22 10:20:37,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:37,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:20:37,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619194639] [2020-12-22 10:20:37,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:20:37,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:37,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:20:37,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:20:37,615 INFO L87 Difference]: Start difference. First operand 4245 states and 6507 transitions. Second operand 3 states. [2020-12-22 10:20:37,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:37,794 INFO L93 Difference]: Finished difference Result 7897 states and 12237 transitions. [2020-12-22 10:20:37,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:20:37,795 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:20:37,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:37,849 INFO L225 Difference]: With dead ends: 7897 [2020-12-22 10:20:37,849 INFO L226 Difference]: Without dead ends: 5975 [2020-12-22 10:20:37,855 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 10:20:37,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5975 states. [2020-12-22 10:20:38,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5975 to 5973. [2020-12-22 10:20:38,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5973 states. [2020-12-22 10:20:38,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5973 states to 5973 states and 9179 transitions. [2020-12-22 10:20:38,114 INFO L78 Accepts]: Start accepts. Automaton has 5973 states and 9179 transitions. Word has length 106 [2020-12-22 10:20:38,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:38,115 INFO L481 AbstractCegarLoop]: Abstraction has 5973 states and 9179 transitions. [2020-12-22 10:20:38,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:20:38,115 INFO L276 IsEmpty]: Start isEmpty. Operand 5973 states and 9179 transitions. [2020-12-22 10:20:38,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:20:38,117 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:38,117 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:20:38,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:20:38,117 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:38,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:38,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1070121549, now seen corresponding path program 1 times [2020-12-22 10:20:38,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:38,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431975343] [2020-12-22 10:20:38,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:38,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:38,208 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 10:20:38,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431975343] [2020-12-22 10:20:38,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:38,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:20:38,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894455968] [2020-12-22 10:20:38,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:20:38,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:38,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:20:38,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:20:38,215 INFO L87 Difference]: Start difference. First operand 5973 states and 9179 transitions. Second operand 3 states. [2020-12-22 10:20:38,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:38,522 INFO L93 Difference]: Finished difference Result 12889 states and 19933 transitions. [2020-12-22 10:20:38,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:20:38,522 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:20:38,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:38,545 INFO L225 Difference]: With dead ends: 12889 [2020-12-22 10:20:38,545 INFO L226 Difference]: Without dead ends: 9239 [2020-12-22 10:20:38,553 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 10:20:38,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9239 states. [2020-12-22 10:20:39,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9239 to 9237. [2020-12-22 10:20:39,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9237 states. [2020-12-22 10:20:39,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9237 states to 9237 states and 14171 transitions. [2020-12-22 10:20:39,094 INFO L78 Accepts]: Start accepts. Automaton has 9237 states and 14171 transitions. Word has length 106 [2020-12-22 10:20:39,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:39,095 INFO L481 AbstractCegarLoop]: Abstraction has 9237 states and 14171 transitions. [2020-12-22 10:20:39,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:20:39,095 INFO L276 IsEmpty]: Start isEmpty. Operand 9237 states and 14171 transitions. [2020-12-22 10:20:39,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:20:39,096 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:39,097 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:20:39,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:20:39,097 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:39,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:39,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1478760321, now seen corresponding path program 1 times [2020-12-22 10:20:39,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:39,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474598800] [2020-12-22 10:20:39,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:39,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:39,292 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 10:20:39,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474598800] [2020-12-22 10:20:39,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:39,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:20:39,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372639079] [2020-12-22 10:20:39,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:20:39,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:39,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:20:39,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:20:39,298 INFO L87 Difference]: Start difference. First operand 9237 states and 14171 transitions. Second operand 10 states. [2020-12-22 10:20:44,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:44,111 INFO L93 Difference]: Finished difference Result 119861 states and 185195 transitions. [2020-12-22 10:20:44,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 10:20:44,112 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 106 [2020-12-22 10:20:44,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:44,437 INFO L225 Difference]: With dead ends: 119861 [2020-12-22 10:20:44,437 INFO L226 Difference]: Without dead ends: 112947 [2020-12-22 10:20:44,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-12-22 10:20:44,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112947 states. [2020-12-22 10:20:47,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112947 to 16149. [2020-12-22 10:20:47,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16149 states. [2020-12-22 10:20:47,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16149 states to 16149 states and 24603 transitions. [2020-12-22 10:20:47,195 INFO L78 Accepts]: Start accepts. Automaton has 16149 states and 24603 transitions. Word has length 106 [2020-12-22 10:20:47,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:47,195 INFO L481 AbstractCegarLoop]: Abstraction has 16149 states and 24603 transitions. [2020-12-22 10:20:47,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:20:47,196 INFO L276 IsEmpty]: Start isEmpty. Operand 16149 states and 24603 transitions. [2020-12-22 10:20:47,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:20:47,197 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:47,197 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:20:47,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:20:47,199 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:47,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:47,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1961193007, now seen corresponding path program 1 times [2020-12-22 10:20:47,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:47,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415939875] [2020-12-22 10:20:47,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:47,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:47,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:20:47,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415939875] [2020-12-22 10:20:47,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:47,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:20:47,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693773060] [2020-12-22 10:20:47,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:20:47,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:47,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:20:47,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:20:47,400 INFO L87 Difference]: Start difference. First operand 16149 states and 24603 transitions. Second operand 3 states. [2020-12-22 10:20:48,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:48,689 INFO L93 Difference]: Finished difference Result 42393 states and 64413 transitions. [2020-12-22 10:20:48,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:20:48,690 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:20:48,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:48,748 INFO L225 Difference]: With dead ends: 42393 [2020-12-22 10:20:48,748 INFO L226 Difference]: Without dead ends: 28567 [2020-12-22 10:20:48,767 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 10:20:48,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28567 states. [2020-12-22 10:20:50,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28567 to 28309. [2020-12-22 10:20:50,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28309 states. [2020-12-22 10:20:50,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28309 states to 28309 states and 42395 transitions. [2020-12-22 10:20:50,594 INFO L78 Accepts]: Start accepts. Automaton has 28309 states and 42395 transitions. Word has length 108 [2020-12-22 10:20:50,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:50,595 INFO L481 AbstractCegarLoop]: Abstraction has 28309 states and 42395 transitions. [2020-12-22 10:20:50,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:20:50,595 INFO L276 IsEmpty]: Start isEmpty. Operand 28309 states and 42395 transitions. [2020-12-22 10:20:50,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:20:50,596 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:50,596 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:20:50,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:20:50,597 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:50,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:50,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1894699495, now seen corresponding path program 1 times [2020-12-22 10:20:50,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:50,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641228177] [2020-12-22 10:20:50,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:50,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:50,974 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 10:20:50,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641228177] [2020-12-22 10:20:50,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:50,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:20:50,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87417654] [2020-12-22 10:20:50,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:20:50,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:50,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:20:50,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:20:50,977 INFO L87 Difference]: Start difference. First operand 28309 states and 42395 transitions. Second operand 10 states. [2020-12-22 10:20:51,403 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-12-22 10:20:53,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:53,414 INFO L93 Difference]: Finished difference Result 54297 states and 81309 transitions. [2020-12-22 10:20:53,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:20:53,414 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 108 [2020-12-22 10:20:53,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:53,454 INFO L225 Difference]: With dead ends: 54297 [2020-12-22 10:20:53,454 INFO L226 Difference]: Without dead ends: 28311 [2020-12-22 10:20:53,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:20:53,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28311 states. [2020-12-22 10:20:55,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28311 to 28309. [2020-12-22 10:20:55,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28309 states. [2020-12-22 10:20:55,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28309 states to 28309 states and 42139 transitions. [2020-12-22 10:20:55,201 INFO L78 Accepts]: Start accepts. Automaton has 28309 states and 42139 transitions. Word has length 108 [2020-12-22 10:20:55,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:55,202 INFO L481 AbstractCegarLoop]: Abstraction has 28309 states and 42139 transitions. [2020-12-22 10:20:55,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:20:55,202 INFO L276 IsEmpty]: Start isEmpty. Operand 28309 states and 42139 transitions. [2020-12-22 10:20:55,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-22 10:20:55,204 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:55,204 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:20:55,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:20:55,204 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:55,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:55,205 INFO L82 PathProgramCache]: Analyzing trace with hash 979135041, now seen corresponding path program 1 times [2020-12-22 10:20:55,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:55,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867135111] [2020-12-22 10:20:55,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:55,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:55,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:20:55,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867135111] [2020-12-22 10:20:55,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:55,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:20:55,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023692983] [2020-12-22 10:20:55,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:20:55,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:55,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:20:55,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:20:55,343 INFO L87 Difference]: Start difference. First operand 28309 states and 42139 transitions. Second operand 6 states. [2020-12-22 10:20:57,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:57,370 INFO L93 Difference]: Finished difference Result 54295 states and 80796 transitions. [2020-12-22 10:20:57,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:20:57,371 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 109 [2020-12-22 10:20:57,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:57,402 INFO L225 Difference]: With dead ends: 54295 [2020-12-22 10:20:57,407 INFO L226 Difference]: Without dead ends: 28309 [2020-12-22 10:20:57,432 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 10:20:57,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28309 states. [2020-12-22 10:20:59,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28309 to 28309. [2020-12-22 10:20:59,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28309 states. [2020-12-22 10:20:59,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28309 states to 28309 states and 41883 transitions. [2020-12-22 10:20:59,054 INFO L78 Accepts]: Start accepts. Automaton has 28309 states and 41883 transitions. Word has length 109 [2020-12-22 10:20:59,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:59,054 INFO L481 AbstractCegarLoop]: Abstraction has 28309 states and 41883 transitions. [2020-12-22 10:20:59,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:20:59,055 INFO L276 IsEmpty]: Start isEmpty. Operand 28309 states and 41883 transitions. [2020-12-22 10:20:59,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-22 10:20:59,056 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:59,056 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:20:59,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:20:59,056 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:59,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:59,057 INFO L82 PathProgramCache]: Analyzing trace with hash 278070463, now seen corresponding path program 1 times [2020-12-22 10:20:59,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:59,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297167380] [2020-12-22 10:20:59,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:59,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:59,201 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 10:20:59,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297167380] [2020-12-22 10:20:59,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:59,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:20:59,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405553789] [2020-12-22 10:20:59,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:20:59,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:59,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:20:59,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:20:59,204 INFO L87 Difference]: Start difference. First operand 28309 states and 41883 transitions. Second operand 8 states. [2020-12-22 10:21:02,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:02,501 INFO L93 Difference]: Finished difference Result 47679 states and 70096 transitions. [2020-12-22 10:21:02,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:21:02,502 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 109 [2020-12-22 10:21:02,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:02,573 INFO L225 Difference]: With dead ends: 47679 [2020-12-22 10:21:02,573 INFO L226 Difference]: Without dead ends: 47677 [2020-12-22 10:21:02,588 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 10:21:02,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47677 states. [2020-12-22 10:21:04,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47677 to 29077. [2020-12-22 10:21:04,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29077 states. [2020-12-22 10:21:04,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29077 states to 29077 states and 42523 transitions. [2020-12-22 10:21:04,714 INFO L78 Accepts]: Start accepts. Automaton has 29077 states and 42523 transitions. Word has length 109 [2020-12-22 10:21:04,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:04,715 INFO L481 AbstractCegarLoop]: Abstraction has 29077 states and 42523 transitions. [2020-12-22 10:21:04,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:21:04,715 INFO L276 IsEmpty]: Start isEmpty. Operand 29077 states and 42523 transitions. [2020-12-22 10:21:04,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-22 10:21:04,717 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:04,717 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:21:04,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:21:04,717 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:04,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:04,718 INFO L82 PathProgramCache]: Analyzing trace with hash 171324818, now seen corresponding path program 1 times [2020-12-22 10:21:04,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:04,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415155596] [2020-12-22 10:21:04,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:04,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:04,790 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 10:21:04,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415155596] [2020-12-22 10:21:04,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:04,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:21:04,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610138496] [2020-12-22 10:21:04,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:21:04,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:04,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:21:04,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:21:04,793 INFO L87 Difference]: Start difference. First operand 29077 states and 42523 transitions. Second operand 3 states. [2020-12-22 10:21:07,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:07,458 INFO L93 Difference]: Finished difference Result 56220 states and 82465 transitions. [2020-12-22 10:21:07,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:21:07,459 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 110 [2020-12-22 10:21:07,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:07,502 INFO L225 Difference]: With dead ends: 56220 [2020-12-22 10:21:07,503 INFO L226 Difference]: Without dead ends: 41625 [2020-12-22 10:21:07,519 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 10:21:07,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41625 states. [2020-12-22 10:21:10,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41625 to 41623. [2020-12-22 10:21:10,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41623 states. [2020-12-22 10:21:10,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41623 states to 41623 states and 60573 transitions. [2020-12-22 10:21:10,459 INFO L78 Accepts]: Start accepts. Automaton has 41623 states and 60573 transitions. Word has length 110 [2020-12-22 10:21:10,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:10,460 INFO L481 AbstractCegarLoop]: Abstraction has 41623 states and 60573 transitions. [2020-12-22 10:21:10,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:21:10,460 INFO L276 IsEmpty]: Start isEmpty. Operand 41623 states and 60573 transitions. [2020-12-22 10:21:10,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-22 10:21:10,465 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:10,466 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 10:21:10,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:21:10,466 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:10,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:10,467 INFO L82 PathProgramCache]: Analyzing trace with hash -453997123, now seen corresponding path program 1 times [2020-12-22 10:21:10,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:10,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456226009] [2020-12-22 10:21:10,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:10,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:10,637 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:21:10,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456226009] [2020-12-22 10:21:10,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:10,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:21:10,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664967136] [2020-12-22 10:21:10,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:21:10,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:10,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:21:10,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:21:10,640 INFO L87 Difference]: Start difference. First operand 41623 states and 60573 transitions. Second operand 4 states. [2020-12-22 10:21:20,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:20,962 INFO L93 Difference]: Finished difference Result 45417 states and 66678 transitions. [2020-12-22 10:21:20,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:21:20,964 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 134 [2020-12-22 10:21:20,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:21,007 INFO L225 Difference]: With dead ends: 45417 [2020-12-22 10:21:21,007 INFO L226 Difference]: Without dead ends: 43125 [2020-12-22 10:21:21,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:21:21,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43125 states. [2020-12-22 10:21:23,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43125 to 43125. [2020-12-22 10:21:23,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43125 states. [2020-12-22 10:21:23,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43125 states to 43125 states and 62158 transitions. [2020-12-22 10:21:23,673 INFO L78 Accepts]: Start accepts. Automaton has 43125 states and 62158 transitions. Word has length 134 [2020-12-22 10:21:23,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:23,673 INFO L481 AbstractCegarLoop]: Abstraction has 43125 states and 62158 transitions. [2020-12-22 10:21:23,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:21:23,674 INFO L276 IsEmpty]: Start isEmpty. Operand 43125 states and 62158 transitions. [2020-12-22 10:21:23,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 10:21:23,699 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:23,700 INFO L422 BasicCegarLoop]: trace histogram [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, 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 10:21:23,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:21:23,700 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:23,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:23,701 INFO L82 PathProgramCache]: Analyzing trace with hash 45078639, now seen corresponding path program 1 times [2020-12-22 10:21:23,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:23,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239603059] [2020-12-22 10:21:23,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:23,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:23,912 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 10:21:23,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239603059] [2020-12-22 10:21:23,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:23,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:21:23,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846395294] [2020-12-22 10:21:23,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:21:23,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:23,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:21:23,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:21:23,922 INFO L87 Difference]: Start difference. First operand 43125 states and 62158 transitions. Second operand 10 states. [2020-12-22 10:21:44,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:44,520 INFO L93 Difference]: Finished difference Result 365063 states and 529495 transitions. [2020-12-22 10:21:44,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:21:44,520 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 148 [2020-12-22 10:21:44,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:45,261 INFO L225 Difference]: With dead ends: 365063 [2020-12-22 10:21:45,262 INFO L226 Difference]: Without dead ends: 325765 [2020-12-22 10:21:45,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:21:45,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325765 states. [2020-12-22 10:21:53,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325765 to 82421. [2020-12-22 10:21:53,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82421 states. [2020-12-22 10:21:53,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82421 states to 82421 states and 118862 transitions. [2020-12-22 10:21:53,412 INFO L78 Accepts]: Start accepts. Automaton has 82421 states and 118862 transitions. Word has length 148 [2020-12-22 10:21:53,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:53,412 INFO L481 AbstractCegarLoop]: Abstraction has 82421 states and 118862 transitions. [2020-12-22 10:21:53,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:21:53,412 INFO L276 IsEmpty]: Start isEmpty. Operand 82421 states and 118862 transitions. [2020-12-22 10:21:53,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 10:21:53,441 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:53,441 INFO L422 BasicCegarLoop]: trace histogram [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, 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 10:21:53,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:21:53,442 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:53,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:53,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1723704177, now seen corresponding path program 1 times [2020-12-22 10:21:53,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:53,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154349535] [2020-12-22 10:21:53,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:53,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:53,881 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 10:21:53,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154349535] [2020-12-22 10:21:53,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:53,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:21:53,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716361955] [2020-12-22 10:21:53,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:21:53,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:53,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:21:53,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:21:53,894 INFO L87 Difference]: Start difference. First operand 82421 states and 118862 transitions. Second operand 10 states. [2020-12-22 10:22:20,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:20,216 INFO L93 Difference]: Finished difference Result 404359 states and 586199 transitions. [2020-12-22 10:22:20,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:22:20,217 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 148 [2020-12-22 10:22:20,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:20,821 INFO L225 Difference]: With dead ends: 404359 [2020-12-22 10:22:20,821 INFO L226 Difference]: Without dead ends: 365061 [2020-12-22 10:22:20,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:22:21,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365061 states. [2020-12-22 10:22:34,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365061 to 141429. [2020-12-22 10:22:34,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141429 states. [2020-12-22 10:22:34,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141429 states to 141429 states and 203598 transitions. [2020-12-22 10:22:34,353 INFO L78 Accepts]: Start accepts. Automaton has 141429 states and 203598 transitions. Word has length 148 [2020-12-22 10:22:34,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:34,353 INFO L481 AbstractCegarLoop]: Abstraction has 141429 states and 203598 transitions. [2020-12-22 10:22:34,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:22:34,353 INFO L276 IsEmpty]: Start isEmpty. Operand 141429 states and 203598 transitions. [2020-12-22 10:22:34,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 10:22:34,382 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:34,382 INFO L422 BasicCegarLoop]: trace histogram [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, 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 10:22:34,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:22:34,382 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:34,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:34,383 INFO L82 PathProgramCache]: Analyzing trace with hash -592064337, now seen corresponding path program 1 times [2020-12-22 10:22:34,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:34,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562814167] [2020-12-22 10:22:34,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:34,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:34,605 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 10:22:34,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562814167] [2020-12-22 10:22:34,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:34,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:22:34,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221737723] [2020-12-22 10:22:34,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:22:34,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:34,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:22:34,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:22:34,607 INFO L87 Difference]: Start difference. First operand 141429 states and 203598 transitions. Second operand 10 states. [2020-12-22 10:23:06,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:23:06,103 INFO L93 Difference]: Finished difference Result 443655 states and 642903 transitions. [2020-12-22 10:23:06,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:23:06,104 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 148 [2020-12-22 10:23:06,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:23:06,992 INFO L225 Difference]: With dead ends: 443655 [2020-12-22 10:23:06,992 INFO L226 Difference]: Without dead ends: 404357 [2020-12-22 10:23:07,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:23:07,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404357 states.