/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.6_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:08:11,202 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:08:11,205 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:08:11,242 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:08:11,243 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:08:11,245 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:08:11,247 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:08:11,249 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:08:11,252 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:08:11,254 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:08:11,255 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:08:11,257 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:08:11,258 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:08:11,259 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:08:11,261 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:08:11,262 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:08:11,264 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:08:11,265 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:08:11,268 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:08:11,270 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:08:11,272 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:08:11,274 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:08:11,276 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:08:11,277 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:08:11,281 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:08:11,307 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:08:11,308 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:08:11,309 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:08:11,313 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:08:11,341 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:08:11,342 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:08:11,343 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:08:11,344 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:08:11,344 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:08:11,344 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:08:11,345 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:08:11,345 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:08:11,345 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:08:11,345 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:08:11,346 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:08:11,346 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:08:11,346 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:08:11,346 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:08:11,347 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:08:11,347 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:08:11,347 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:08:11,347 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:08:11,348 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:08:11,348 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:08:11,348 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:08:11,349 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:08:11,349 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:08:11,349 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:08:11,349 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:08:11,350 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:08:11,742 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:08:11,794 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:08:11,799 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:08:11,801 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:08:11,802 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:08:11,803 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.6_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c [2020-12-22 10:08:11,906 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af8057fba/4e00aef49dc84d57a40b03ec3ddc7f97/FLAG97edf7958 [2020-12-22 10:08:13,058 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:08:13,059 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.6_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c [2020-12-22 10:08:13,108 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af8057fba/4e00aef49dc84d57a40b03ec3ddc7f97/FLAG97edf7958 [2020-12-22 10:08:13,497 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af8057fba/4e00aef49dc84d57a40b03ec3ddc7f97 [2020-12-22 10:08:13,500 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:08:13,502 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:08:13,504 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:08:13,505 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:08:13,510 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:08:13,511 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:08:13" (1/1) ... [2020-12-22 10:08:13,518 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76cf6982 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:13, skipping insertion in model container [2020-12-22 10:08:13,518 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:08:13" (1/1) ... [2020-12-22 10:08:13,529 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:08:13,757 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:08:14,111 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.6_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c[15688,15701] [2020-12-22 10:08:14,174 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.6_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c[22735,22748] [2020-12-22 10:08:15,323 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:08:15,340 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:08:15,430 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.6_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c[15688,15701] [2020-12-22 10:08:15,447 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.6_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c[22735,22748] [2020-12-22 10:08:16,106 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:08:16,156 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:08:16,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:16 WrapperNode [2020-12-22 10:08:16,157 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:08:16,161 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:08:16,161 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:08:16,162 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:08:16,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:16" (1/1) ... [2020-12-22 10:08:16,249 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:16" (1/1) ... [2020-12-22 10:08:16,652 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:08:16,653 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:08:16,654 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:08:16,654 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:08:16,664 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:16" (1/1) ... [2020-12-22 10:08:16,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:16" (1/1) ... [2020-12-22 10:08:16,759 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:16" (1/1) ... [2020-12-22 10:08:16,760 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:16" (1/1) ... [2020-12-22 10:08:17,045 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:16" (1/1) ... [2020-12-22 10:08:17,087 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:16" (1/1) ... [2020-12-22 10:08:17,257 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:16" (1/1) ... [2020-12-22 10:08:17,343 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:08:17,345 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:08:17,345 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:08:17,345 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:08:17,346 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:16" (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 10:08:17,469 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:08:17,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:08:17,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:08:17,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:08:23,242 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:08:23,242 INFO L299 CfgBuilder]: Removed 38 assume(true) statements. [2020-12-22 10:08:23,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:08:23 BoogieIcfgContainer [2020-12-22 10:08:23,246 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:08:23,247 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:08:23,248 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:08:23,251 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:08:23,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:08:13" (1/3) ... [2020-12-22 10:08:23,252 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32b8c054 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:08:23, skipping insertion in model container [2020-12-22 10:08:23,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:16" (2/3) ... [2020-12-22 10:08:23,253 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32b8c054 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:08:23, skipping insertion in model container [2020-12-22 10:08:23,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:08:23" (3/3) ... [2020-12-22 10:08:23,255 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c [2020-12-22 10:08:23,261 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:08:23,268 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:08:23,288 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:08:23,342 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:08:23,343 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:08:23,343 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:08:23,343 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:08:23,343 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:08:23,343 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:08:23,343 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:08:23,343 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:08:23,384 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states. [2020-12-22 10:08:23,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 10:08:23,400 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:08:23,401 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:08:23,402 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:08:23,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:08:23,409 INFO L82 PathProgramCache]: Analyzing trace with hash 340623278, now seen corresponding path program 1 times [2020-12-22 10:08:23,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:08:23,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980580245] [2020-12-22 10:08:23,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:08:23,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:08:23,772 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 10:08:23,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980580245] [2020-12-22 10:08:23,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:08:23,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:08:23,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746436222] [2020-12-22 10:08:23,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 10:08:23,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:08:23,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 10:08:23,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:08:23,804 INFO L87 Difference]: Start difference. First operand 925 states. Second operand 2 states. [2020-12-22 10:08:23,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:08:23,929 INFO L93 Difference]: Finished difference Result 1802 states and 3414 transitions. [2020-12-22 10:08:23,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 10:08:23,931 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 38 [2020-12-22 10:08:23,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:08:23,985 INFO L225 Difference]: With dead ends: 1802 [2020-12-22 10:08:23,986 INFO L226 Difference]: Without dead ends: 859 [2020-12-22 10:08:24,000 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 10:08:24,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2020-12-22 10:08:24,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 859. [2020-12-22 10:08:24,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 859 states. [2020-12-22 10:08:24,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 1619 transitions. [2020-12-22 10:08:24,101 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 1619 transitions. Word has length 38 [2020-12-22 10:08:24,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:08:24,102 INFO L481 AbstractCegarLoop]: Abstraction has 859 states and 1619 transitions. [2020-12-22 10:08:24,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 10:08:24,102 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 1619 transitions. [2020-12-22 10:08:24,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 10:08:24,104 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:08:24,104 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:08:24,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:08:24,105 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:08:24,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:08:24,106 INFO L82 PathProgramCache]: Analyzing trace with hash 615382892, now seen corresponding path program 1 times [2020-12-22 10:08:24,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:08:24,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946991804] [2020-12-22 10:08:24,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:08:24,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:08:24,232 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 10:08:24,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946991804] [2020-12-22 10:08:24,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:08:24,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:08:24,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898332598] [2020-12-22 10:08:24,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:08:24,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:08:24,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:08:24,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:08:24,236 INFO L87 Difference]: Start difference. First operand 859 states and 1619 transitions. Second operand 5 states. [2020-12-22 10:08:24,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:08:24,398 INFO L93 Difference]: Finished difference Result 922 states and 1717 transitions. [2020-12-22 10:08:24,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:08:24,399 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-12-22 10:08:24,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:08:24,404 INFO L225 Difference]: With dead ends: 922 [2020-12-22 10:08:24,405 INFO L226 Difference]: Without dead ends: 859 [2020-12-22 10:08:24,406 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 10:08:24,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2020-12-22 10:08:24,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 859. [2020-12-22 10:08:24,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 859 states. [2020-12-22 10:08:24,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 1579 transitions. [2020-12-22 10:08:24,432 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 1579 transitions. Word has length 38 [2020-12-22 10:08:24,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:08:24,432 INFO L481 AbstractCegarLoop]: Abstraction has 859 states and 1579 transitions. [2020-12-22 10:08:24,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:08:24,432 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 1579 transitions. [2020-12-22 10:08:24,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 10:08:24,435 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:08:24,435 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:08:24,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:08:24,436 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:08:24,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:08:24,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1649684925, now seen corresponding path program 1 times [2020-12-22 10:08:24,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:08:24,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105148436] [2020-12-22 10:08:24,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:08:24,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:08:24,776 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 10:08:24,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105148436] [2020-12-22 10:08:24,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:08:24,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:08:24,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635868555] [2020-12-22 10:08:24,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:08:24,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:08:24,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:08:24,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:08:24,779 INFO L87 Difference]: Start difference. First operand 859 states and 1579 transitions. Second operand 4 states. [2020-12-22 10:08:36,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:08:36,020 INFO L93 Difference]: Finished difference Result 3114 states and 5888 transitions. [2020-12-22 10:08:36,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:08:36,021 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2020-12-22 10:08:36,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:08:36,035 INFO L225 Difference]: With dead ends: 3114 [2020-12-22 10:08:36,036 INFO L226 Difference]: Without dead ends: 2361 [2020-12-22 10:08:36,038 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 10:08:36,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2020-12-22 10:08:36,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 2361. [2020-12-22 10:08:36,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2361 states. [2020-12-22 10:08:36,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2361 states to 2361 states and 3693 transitions. [2020-12-22 10:08:36,094 INFO L78 Accepts]: Start accepts. Automaton has 2361 states and 3693 transitions. Word has length 63 [2020-12-22 10:08:36,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:08:36,094 INFO L481 AbstractCegarLoop]: Abstraction has 2361 states and 3693 transitions. [2020-12-22 10:08:36,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:08:36,095 INFO L276 IsEmpty]: Start isEmpty. Operand 2361 states and 3693 transitions. [2020-12-22 10:08:36,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:08:36,097 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:08:36,098 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:08:36,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:08:36,098 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:08:36,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:08:36,099 INFO L82 PathProgramCache]: Analyzing trace with hash -2101054792, now seen corresponding path program 1 times [2020-12-22 10:08:36,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:08:36,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859713621] [2020-12-22 10:08:36,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:08:36,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:08:36,226 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 10:08:36,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859713621] [2020-12-22 10:08:36,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:08:36,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:08:36,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823330013] [2020-12-22 10:08:36,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:08:36,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:08:36,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:08:36,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:08:36,230 INFO L87 Difference]: Start difference. First operand 2361 states and 3693 transitions. Second operand 3 states. [2020-12-22 10:08:36,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:08:36,274 INFO L93 Difference]: Finished difference Result 2473 states and 3871 transitions. [2020-12-22 10:08:36,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:08:36,275 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 10:08:36,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:08:36,290 INFO L225 Difference]: With dead ends: 2473 [2020-12-22 10:08:36,290 INFO L226 Difference]: Without dead ends: 2414 [2020-12-22 10:08:36,291 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 10:08:36,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2414 states. [2020-12-22 10:08:36,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2414 to 2412. [2020-12-22 10:08:36,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2412 states. [2020-12-22 10:08:36,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2412 states to 2412 states and 3775 transitions. [2020-12-22 10:08:36,350 INFO L78 Accepts]: Start accepts. Automaton has 2412 states and 3775 transitions. Word has length 77 [2020-12-22 10:08:36,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:08:36,350 INFO L481 AbstractCegarLoop]: Abstraction has 2412 states and 3775 transitions. [2020-12-22 10:08:36,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:08:36,351 INFO L276 IsEmpty]: Start isEmpty. Operand 2412 states and 3775 transitions. [2020-12-22 10:08:36,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:08:36,354 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:08:36,355 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:08:36,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:08:36,355 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:08:36,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:08:36,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1452480302, now seen corresponding path program 1 times [2020-12-22 10:08:36,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:08:36,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961762423] [2020-12-22 10:08:36,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:08:36,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:08:36,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:08:36,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961762423] [2020-12-22 10:08:36,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:08:36,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:08:36,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376381446] [2020-12-22 10:08:36,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:08:36,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:08:36,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:08:36,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:08:36,549 INFO L87 Difference]: Start difference. First operand 2412 states and 3775 transitions. Second operand 3 states. [2020-12-22 10:08:36,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:08:36,603 INFO L93 Difference]: Finished difference Result 2620 states and 4107 transitions. [2020-12-22 10:08:36,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:08:36,603 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 10:08:36,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:08:36,620 INFO L225 Difference]: With dead ends: 2620 [2020-12-22 10:08:36,621 INFO L226 Difference]: Without dead ends: 2510 [2020-12-22 10:08:36,622 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 10:08:36,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2510 states. [2020-12-22 10:08:36,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2510 to 2508. [2020-12-22 10:08:36,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2508 states. [2020-12-22 10:08:36,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2508 states to 2508 states and 3928 transitions. [2020-12-22 10:08:36,695 INFO L78 Accepts]: Start accepts. Automaton has 2508 states and 3928 transitions. Word has length 77 [2020-12-22 10:08:36,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:08:36,697 INFO L481 AbstractCegarLoop]: Abstraction has 2508 states and 3928 transitions. [2020-12-22 10:08:36,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:08:36,697 INFO L276 IsEmpty]: Start isEmpty. Operand 2508 states and 3928 transitions. [2020-12-22 10:08:36,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:08:36,699 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:08:36,699 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:08:36,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:08:36,699 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:08:36,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:08:36,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1624501596, now seen corresponding path program 1 times [2020-12-22 10:08:36,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:08:36,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227758158] [2020-12-22 10:08:36,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:08:36,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:08:36,875 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 10:08:36,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227758158] [2020-12-22 10:08:36,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:08:36,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:08:36,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503199751] [2020-12-22 10:08:36,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:08:36,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:08:36,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:08:36,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:08:36,877 INFO L87 Difference]: Start difference. First operand 2508 states and 3928 transitions. Second operand 8 states. [2020-12-22 10:08:37,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:08:37,295 INFO L93 Difference]: Finished difference Result 4980 states and 7876 transitions. [2020-12-22 10:08:37,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 10:08:37,295 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 77 [2020-12-22 10:08:37,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:08:37,321 INFO L225 Difference]: With dead ends: 4980 [2020-12-22 10:08:37,321 INFO L226 Difference]: Without dead ends: 4774 [2020-12-22 10:08:37,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:08:37,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4774 states. [2020-12-22 10:08:37,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4774 to 2712. [2020-12-22 10:08:37,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2712 states. [2020-12-22 10:08:37,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2712 states to 2712 states and 4248 transitions. [2020-12-22 10:08:37,425 INFO L78 Accepts]: Start accepts. Automaton has 2712 states and 4248 transitions. Word has length 77 [2020-12-22 10:08:37,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:08:37,425 INFO L481 AbstractCegarLoop]: Abstraction has 2712 states and 4248 transitions. [2020-12-22 10:08:37,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:08:37,425 INFO L276 IsEmpty]: Start isEmpty. Operand 2712 states and 4248 transitions. [2020-12-22 10:08:37,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:08:37,426 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:08:37,427 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:08:37,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:08:37,427 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:08:37,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:08:37,431 INFO L82 PathProgramCache]: Analyzing trace with hash 806369108, now seen corresponding path program 1 times [2020-12-22 10:08:37,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:08:37,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593224772] [2020-12-22 10:08:37,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:08:37,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:08:37,560 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 10:08:37,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593224772] [2020-12-22 10:08:37,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:08:37,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:08:37,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048343658] [2020-12-22 10:08:37,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:08:37,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:08:37,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:08:37,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:08:37,564 INFO L87 Difference]: Start difference. First operand 2712 states and 4248 transitions. Second operand 3 states. [2020-12-22 10:08:37,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:08:37,633 INFO L93 Difference]: Finished difference Result 3320 states and 5208 transitions. [2020-12-22 10:08:37,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:08:37,633 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:08:37,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:08:37,648 INFO L225 Difference]: With dead ends: 3320 [2020-12-22 10:08:37,649 INFO L226 Difference]: Without dead ends: 2910 [2020-12-22 10:08:37,651 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 10:08:37,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2910 states. [2020-12-22 10:08:37,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2910 to 2908. [2020-12-22 10:08:37,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2908 states. [2020-12-22 10:08:37,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2908 states to 2908 states and 4552 transitions. [2020-12-22 10:08:37,742 INFO L78 Accepts]: Start accepts. Automaton has 2908 states and 4552 transitions. Word has length 79 [2020-12-22 10:08:37,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:08:37,743 INFO L481 AbstractCegarLoop]: Abstraction has 2908 states and 4552 transitions. [2020-12-22 10:08:37,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:08:37,743 INFO L276 IsEmpty]: Start isEmpty. Operand 2908 states and 4552 transitions. [2020-12-22 10:08:37,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:08:37,750 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:08:37,751 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:08:37,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:08:37,751 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:08:37,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:08:37,752 INFO L82 PathProgramCache]: Analyzing trace with hash 872862620, now seen corresponding path program 1 times [2020-12-22 10:08:37,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:08:37,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161270701] [2020-12-22 10:08:37,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:08:37,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:08:38,039 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 10:08:38,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161270701] [2020-12-22 10:08:38,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:08:38,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:08:38,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305863103] [2020-12-22 10:08:38,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:08:38,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:08:38,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:08:38,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:08:38,042 INFO L87 Difference]: Start difference. First operand 2908 states and 4552 transitions. Second operand 8 states. [2020-12-22 10:08:38,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:08:38,438 INFO L93 Difference]: Finished difference Result 3514 states and 5504 transitions. [2020-12-22 10:08:38,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:08:38,439 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 79 [2020-12-22 10:08:38,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:08:38,454 INFO L225 Difference]: With dead ends: 3514 [2020-12-22 10:08:38,454 INFO L226 Difference]: Without dead ends: 2910 [2020-12-22 10:08:38,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2020-12-22 10:08:38,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2910 states. [2020-12-22 10:08:38,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2910 to 2908. [2020-12-22 10:08:38,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2908 states. [2020-12-22 10:08:38,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2908 states to 2908 states and 4546 transitions. [2020-12-22 10:08:38,551 INFO L78 Accepts]: Start accepts. Automaton has 2908 states and 4546 transitions. Word has length 79 [2020-12-22 10:08:38,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:08:38,551 INFO L481 AbstractCegarLoop]: Abstraction has 2908 states and 4546 transitions. [2020-12-22 10:08:38,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:08:38,552 INFO L276 IsEmpty]: Start isEmpty. Operand 2908 states and 4546 transitions. [2020-12-22 10:08:38,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:08:38,553 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:08:38,553 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:08:38,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:08:38,553 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:08:38,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:08:38,554 INFO L82 PathProgramCache]: Analyzing trace with hash -385682984, now seen corresponding path program 1 times [2020-12-22 10:08:38,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:08:38,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927282100] [2020-12-22 10:08:38,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:08:38,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:08:38,613 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 10:08:38,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927282100] [2020-12-22 10:08:38,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:08:38,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:08:38,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426953488] [2020-12-22 10:08:38,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:08:38,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:08:38,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:08:38,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:08:38,616 INFO L87 Difference]: Start difference. First operand 2908 states and 4546 transitions. Second operand 3 states. [2020-12-22 10:08:38,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:08:38,712 INFO L93 Difference]: Finished difference Result 4044 states and 6316 transitions. [2020-12-22 10:08:38,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:08:38,712 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:08:38,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:08:38,730 INFO L225 Difference]: With dead ends: 4044 [2020-12-22 10:08:38,730 INFO L226 Difference]: Without dead ends: 3440 [2020-12-22 10:08:38,733 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 10:08:38,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3440 states. [2020-12-22 10:08:38,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3440 to 3438. [2020-12-22 10:08:38,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3438 states. [2020-12-22 10:08:38,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3438 states to 3438 states and 5358 transitions. [2020-12-22 10:08:38,944 INFO L78 Accepts]: Start accepts. Automaton has 3438 states and 5358 transitions. Word has length 79 [2020-12-22 10:08:38,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:08:38,944 INFO L481 AbstractCegarLoop]: Abstraction has 3438 states and 5358 transitions. [2020-12-22 10:08:38,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:08:38,945 INFO L276 IsEmpty]: Start isEmpty. Operand 3438 states and 5358 transitions. [2020-12-22 10:08:38,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:08:38,946 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:08:38,946 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:08:38,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:08:38,947 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:08:38,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:08:38,947 INFO L82 PathProgramCache]: Analyzing trace with hash -111995272, now seen corresponding path program 1 times [2020-12-22 10:08:38,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:08:38,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122619518] [2020-12-22 10:08:38,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:08:38,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:08:39,022 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 10:08:39,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122619518] [2020-12-22 10:08:39,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:08:39,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:08:39,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986735580] [2020-12-22 10:08:39,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:08:39,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:08:39,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:08:39,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:08:39,028 INFO L87 Difference]: Start difference. First operand 3438 states and 5358 transitions. Second operand 3 states. [2020-12-22 10:08:39,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:08:39,211 INFO L93 Difference]: Finished difference Result 5562 states and 8632 transitions. [2020-12-22 10:08:39,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:08:39,212 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:08:39,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:08:39,228 INFO L225 Difference]: With dead ends: 5562 [2020-12-22 10:08:39,228 INFO L226 Difference]: Without dead ends: 4428 [2020-12-22 10:08:39,233 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 10:08:39,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4428 states. [2020-12-22 10:08:39,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4428 to 4426. [2020-12-22 10:08:39,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4426 states. [2020-12-22 10:08:39,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4426 states to 4426 states and 6850 transitions. [2020-12-22 10:08:39,472 INFO L78 Accepts]: Start accepts. Automaton has 4426 states and 6850 transitions. Word has length 79 [2020-12-22 10:08:39,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:08:39,472 INFO L481 AbstractCegarLoop]: Abstraction has 4426 states and 6850 transitions. [2020-12-22 10:08:39,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:08:39,472 INFO L276 IsEmpty]: Start isEmpty. Operand 4426 states and 6850 transitions. [2020-12-22 10:08:39,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:08:39,473 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:08:39,474 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:08:39,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:08:39,474 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:08:39,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:08:39,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1707076376, now seen corresponding path program 1 times [2020-12-22 10:08:39,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:08:39,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582154677] [2020-12-22 10:08:39,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:08:39,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:08:39,546 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 10:08:39,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582154677] [2020-12-22 10:08:39,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:08:39,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:08:39,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120886284] [2020-12-22 10:08:39,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:08:39,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:08:39,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:08:39,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:08:39,550 INFO L87 Difference]: Start difference. First operand 4426 states and 6850 transitions. Second operand 3 states. [2020-12-22 10:08:39,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:08:39,826 INFO L93 Difference]: Finished difference Result 8382 states and 12868 transitions. [2020-12-22 10:08:39,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:08:39,826 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:08:39,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:08:39,841 INFO L225 Difference]: With dead ends: 8382 [2020-12-22 10:08:39,841 INFO L226 Difference]: Without dead ends: 6260 [2020-12-22 10:08:39,847 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 10:08:39,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6260 states. [2020-12-22 10:08:40,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6260 to 6258. [2020-12-22 10:08:40,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6258 states. [2020-12-22 10:08:40,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6258 states to 6258 states and 9570 transitions. [2020-12-22 10:08:40,184 INFO L78 Accepts]: Start accepts. Automaton has 6258 states and 9570 transitions. Word has length 79 [2020-12-22 10:08:40,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:08:40,185 INFO L481 AbstractCegarLoop]: Abstraction has 6258 states and 9570 transitions. [2020-12-22 10:08:40,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:08:40,185 INFO L276 IsEmpty]: Start isEmpty. Operand 6258 states and 9570 transitions. [2020-12-22 10:08:40,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:08:40,186 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:08:40,186 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:08:40,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:08:40,187 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:08:40,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:08:40,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1886482360, now seen corresponding path program 1 times [2020-12-22 10:08:40,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:08:40,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184935279] [2020-12-22 10:08:40,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:08:40,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:08:40,248 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 10:08:40,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184935279] [2020-12-22 10:08:40,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:08:40,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:08:40,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437878751] [2020-12-22 10:08:40,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:08:40,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:08:40,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:08:40,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:08:40,251 INFO L87 Difference]: Start difference. First operand 6258 states and 9570 transitions. Second operand 3 states. [2020-12-22 10:08:40,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:08:40,728 INFO L93 Difference]: Finished difference Result 13590 states and 20548 transitions. [2020-12-22 10:08:40,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:08:40,729 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:08:40,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:08:40,752 INFO L225 Difference]: With dead ends: 13590 [2020-12-22 10:08:40,752 INFO L226 Difference]: Without dead ends: 9636 [2020-12-22 10:08:40,762 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 10:08:40,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9636 states. [2020-12-22 10:08:41,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9636 to 9634. [2020-12-22 10:08:41,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9634 states. [2020-12-22 10:08:41,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9634 states to 9634 states and 14482 transitions. [2020-12-22 10:08:41,384 INFO L78 Accepts]: Start accepts. Automaton has 9634 states and 14482 transitions. Word has length 79 [2020-12-22 10:08:41,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:08:41,384 INFO L481 AbstractCegarLoop]: Abstraction has 9634 states and 14482 transitions. [2020-12-22 10:08:41,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:08:41,385 INFO L276 IsEmpty]: Start isEmpty. Operand 9634 states and 14482 transitions. [2020-12-22 10:08:41,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 10:08:41,386 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:08:41,386 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:08:41,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:08:41,386 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:08:41,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:08:41,387 INFO L82 PathProgramCache]: Analyzing trace with hash 874214487, now seen corresponding path program 1 times [2020-12-22 10:08:41,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:08:41,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365388700] [2020-12-22 10:08:41,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:08:41,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:08:41,516 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 10:08:41,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365388700] [2020-12-22 10:08:41,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:08:41,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:08:41,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428992657] [2020-12-22 10:08:41,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:08:41,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:08:41,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:08:41,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:08:41,518 INFO L87 Difference]: Start difference. First operand 9634 states and 14482 transitions. Second operand 8 states. [2020-12-22 10:08:42,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:08:42,633 INFO L93 Difference]: Finished difference Result 15969 states and 23625 transitions. [2020-12-22 10:08:42,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:08:42,634 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 80 [2020-12-22 10:08:42,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:08:42,666 INFO L225 Difference]: With dead ends: 15969 [2020-12-22 10:08:42,667 INFO L226 Difference]: Without dead ends: 15967 [2020-12-22 10:08:42,671 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 10:08:42,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15967 states. [2020-12-22 10:08:43,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15967 to 10018. [2020-12-22 10:08:43,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10018 states. [2020-12-22 10:08:43,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10018 states to 10018 states and 14834 transitions. [2020-12-22 10:08:43,374 INFO L78 Accepts]: Start accepts. Automaton has 10018 states and 14834 transitions. Word has length 80 [2020-12-22 10:08:43,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:08:43,375 INFO L481 AbstractCegarLoop]: Abstraction has 10018 states and 14834 transitions. [2020-12-22 10:08:43,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:08:43,375 INFO L276 IsEmpty]: Start isEmpty. Operand 10018 states and 14834 transitions. [2020-12-22 10:08:43,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 10:08:43,381 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:08:43,382 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:08:43,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:08:43,382 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:08:43,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:08:43,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1535674975, now seen corresponding path program 1 times [2020-12-22 10:08:43,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:08:43,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154092083] [2020-12-22 10:08:43,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:08:43,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:08:43,551 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-22 10:08:43,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154092083] [2020-12-22 10:08:43,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:08:43,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:08:43,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315912220] [2020-12-22 10:08:43,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:08:43,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:08:43,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:08:43,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:08:43,553 INFO L87 Difference]: Start difference. First operand 10018 states and 14834 transitions. Second operand 8 states. [2020-12-22 10:08:46,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:08:46,581 INFO L93 Difference]: Finished difference Result 57840 states and 84361 transitions. [2020-12-22 10:08:46,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:08:46,582 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 111 [2020-12-22 10:08:46,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:08:46,693 INFO L225 Difference]: With dead ends: 57840 [2020-12-22 10:08:46,693 INFO L226 Difference]: Without dead ends: 50126 [2020-12-22 10:08:46,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:08:46,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50126 states. [2020-12-22 10:08:48,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50126 to 17730. [2020-12-22 10:08:48,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17730 states. [2020-12-22 10:08:48,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17730 states to 17730 states and 25970 transitions. [2020-12-22 10:08:48,324 INFO L78 Accepts]: Start accepts. Automaton has 17730 states and 25970 transitions. Word has length 111 [2020-12-22 10:08:48,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:08:48,324 INFO L481 AbstractCegarLoop]: Abstraction has 17730 states and 25970 transitions. [2020-12-22 10:08:48,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:08:48,325 INFO L276 IsEmpty]: Start isEmpty. Operand 17730 states and 25970 transitions. [2020-12-22 10:08:48,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 10:08:48,333 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:08:48,333 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:08:48,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:08:48,334 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:08:48,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:08:48,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1506152757, now seen corresponding path program 1 times [2020-12-22 10:08:48,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:08:48,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117286253] [2020-12-22 10:08:48,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:08:48,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:08:48,479 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 10:08:48,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117286253] [2020-12-22 10:08:48,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:08:48,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:08:48,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233498583] [2020-12-22 10:08:48,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:08:48,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:08:48,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:08:48,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:08:48,482 INFO L87 Difference]: Start difference. First operand 17730 states and 25970 transitions. Second operand 8 states. [2020-12-22 10:08:52,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:08:52,144 INFO L93 Difference]: Finished difference Result 65552 states and 95497 transitions. [2020-12-22 10:08:52,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:08:52,145 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 111 [2020-12-22 10:08:52,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:08:52,273 INFO L225 Difference]: With dead ends: 65552 [2020-12-22 10:08:52,274 INFO L226 Difference]: Without dead ends: 57838 [2020-12-22 10:08:52,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:08:52,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57838 states. [2020-12-22 10:08:54,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57838 to 29314. [2020-12-22 10:08:54,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29314 states. [2020-12-22 10:08:54,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29314 states to 29314 states and 42594 transitions. [2020-12-22 10:08:54,420 INFO L78 Accepts]: Start accepts. Automaton has 29314 states and 42594 transitions. Word has length 111 [2020-12-22 10:08:54,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:08:54,421 INFO L481 AbstractCegarLoop]: Abstraction has 29314 states and 42594 transitions. [2020-12-22 10:08:54,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:08:54,421 INFO L276 IsEmpty]: Start isEmpty. Operand 29314 states and 42594 transitions. [2020-12-22 10:08:54,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 10:08:54,430 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:08:54,431 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:08:54,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:08:54,431 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:08:54,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:08:54,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1232465045, now seen corresponding path program 1 times [2020-12-22 10:08:54,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:08:54,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832500843] [2020-12-22 10:08:54,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:08:54,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:08:54,573 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 10:08:54,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832500843] [2020-12-22 10:08:54,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:08:54,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:08:54,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678061614] [2020-12-22 10:08:54,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:08:54,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:08:54,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:08:54,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:08:54,575 INFO L87 Difference]: Start difference. First operand 29314 states and 42594 transitions. Second operand 8 states. [2020-12-22 10:08:58,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:08:58,470 INFO L93 Difference]: Finished difference Result 73264 states and 106633 transitions. [2020-12-22 10:08:58,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:08:58,471 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 111 [2020-12-22 10:08:58,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:08:58,595 INFO L225 Difference]: With dead ends: 73264 [2020-12-22 10:08:58,596 INFO L226 Difference]: Without dead ends: 65550 [2020-12-22 10:08:58,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:08:58,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65550 states. [2020-12-22 10:09:01,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65550 to 37026. [2020-12-22 10:09:01,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37026 states. [2020-12-22 10:09:01,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37026 states to 37026 states and 53730 transitions. [2020-12-22 10:09:01,635 INFO L78 Accepts]: Start accepts. Automaton has 37026 states and 53730 transitions. Word has length 111 [2020-12-22 10:09:01,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:09:01,635 INFO L481 AbstractCegarLoop]: Abstraction has 37026 states and 53730 transitions. [2020-12-22 10:09:01,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:09:01,635 INFO L276 IsEmpty]: Start isEmpty. Operand 37026 states and 53730 transitions. [2020-12-22 10:09:01,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 10:09:01,646 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:09:01,647 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:09:01,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:09:01,647 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:09:01,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:09:01,648 INFO L82 PathProgramCache]: Analyzing trace with hash 586606603, now seen corresponding path program 1 times [2020-12-22 10:09:01,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:09:01,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635738839] [2020-12-22 10:09:01,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:09:01,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:09:01,790 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 10:09:01,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635738839] [2020-12-22 10:09:01,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:09:01,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:09:01,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847855394] [2020-12-22 10:09:01,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:09:01,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:09:01,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:09:01,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:09:01,792 INFO L87 Difference]: Start difference. First operand 37026 states and 53730 transitions. Second operand 8 states. [2020-12-22 10:09:07,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:09:07,251 INFO L93 Difference]: Finished difference Result 80976 states and 117769 transitions. [2020-12-22 10:09:07,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:09:07,251 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 111 [2020-12-22 10:09:07,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:09:07,346 INFO L225 Difference]: With dead ends: 80976 [2020-12-22 10:09:07,347 INFO L226 Difference]: Without dead ends: 73262 [2020-12-22 10:09:07,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:09:07,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73262 states. [2020-12-22 10:09:10,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73262 to 44738. [2020-12-22 10:09:10,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44738 states. [2020-12-22 10:09:10,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44738 states to 44738 states and 64866 transitions. [2020-12-22 10:09:10,857 INFO L78 Accepts]: Start accepts. Automaton has 44738 states and 64866 transitions. Word has length 111 [2020-12-22 10:09:10,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:09:10,857 INFO L481 AbstractCegarLoop]: Abstraction has 44738 states and 64866 transitions. [2020-12-22 10:09:10,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:09:10,857 INFO L276 IsEmpty]: Start isEmpty. Operand 44738 states and 64866 transitions. [2020-12-22 10:09:10,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 10:09:10,868 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:09:10,869 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:09:10,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:09:10,869 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:09:10,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:09:10,870 INFO L82 PathProgramCache]: Analyzing trace with hash 766012587, now seen corresponding path program 1 times [2020-12-22 10:09:10,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:09:10,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331727670] [2020-12-22 10:09:10,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:09:10,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:09:11,010 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 10:09:11,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331727670] [2020-12-22 10:09:11,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:09:11,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:09:11,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46874762] [2020-12-22 10:09:11,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:09:11,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:09:11,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:09:11,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:09:11,013 INFO L87 Difference]: Start difference. First operand 44738 states and 64866 transitions. Second operand 8 states. [2020-12-22 10:09:17,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:09:17,228 INFO L93 Difference]: Finished difference Result 88688 states and 128905 transitions. [2020-12-22 10:09:17,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:09:17,229 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 111 [2020-12-22 10:09:17,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:09:17,325 INFO L225 Difference]: With dead ends: 88688 [2020-12-22 10:09:17,325 INFO L226 Difference]: Without dead ends: 80974 [2020-12-22 10:09:17,353 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:09:17,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80974 states. [2020-12-22 10:09:21,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80974 to 52450. [2020-12-22 10:09:21,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52450 states. [2020-12-22 10:09:21,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52450 states to 52450 states and 76002 transitions. [2020-12-22 10:09:21,747 INFO L78 Accepts]: Start accepts. Automaton has 52450 states and 76002 transitions. Word has length 111 [2020-12-22 10:09:21,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:09:21,748 INFO L481 AbstractCegarLoop]: Abstraction has 52450 states and 76002 transitions. [2020-12-22 10:09:21,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:09:21,748 INFO L276 IsEmpty]: Start isEmpty. Operand 52450 states and 76002 transitions. [2020-12-22 10:09:21,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 10:09:21,759 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:09:21,759 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:09:21,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:09:21,759 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:09:21,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:09:21,760 INFO L82 PathProgramCache]: Analyzing trace with hash -545390527, now seen corresponding path program 1 times [2020-12-22 10:09:21,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:09:21,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271772636] [2020-12-22 10:09:21,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:09:21,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:09:21,891 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:09:21,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271772636] [2020-12-22 10:09:21,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:09:21,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:09:21,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877721101] [2020-12-22 10:09:21,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:09:21,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:09:21,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:09:21,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:09:21,894 INFO L87 Difference]: Start difference. First operand 52450 states and 76002 transitions. Second operand 8 states. [2020-12-22 10:09:28,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:09:28,809 INFO L93 Difference]: Finished difference Result 91728 states and 133321 transitions. [2020-12-22 10:09:28,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:09:28,809 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 111 [2020-12-22 10:09:28,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:09:28,899 INFO L225 Difference]: With dead ends: 91728 [2020-12-22 10:09:28,899 INFO L226 Difference]: Without dead ends: 86350 [2020-12-22 10:09:28,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:09:28,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86350 states. [2020-12-22 10:09:34,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86350 to 57826. [2020-12-22 10:09:34,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57826 states. [2020-12-22 10:09:34,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57826 states to 57826 states and 83810 transitions. [2020-12-22 10:09:34,190 INFO L78 Accepts]: Start accepts. Automaton has 57826 states and 83810 transitions. Word has length 111 [2020-12-22 10:09:34,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:09:34,191 INFO L481 AbstractCegarLoop]: Abstraction has 57826 states and 83810 transitions. [2020-12-22 10:09:34,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:09:34,191 INFO L276 IsEmpty]: Start isEmpty. Operand 57826 states and 83810 transitions. [2020-12-22 10:09:34,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:09:34,204 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:09:34,205 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:09:34,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:09:34,205 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:09:34,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:09:34,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1181155843, now seen corresponding path program 1 times [2020-12-22 10:09:34,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:09:34,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649274806] [2020-12-22 10:09:34,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:09:34,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:09:34,281 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:09:34,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649274806] [2020-12-22 10:09:34,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:09:34,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:09:34,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244775162] [2020-12-22 10:09:34,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:09:34,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:09:34,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:09:34,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:09:34,283 INFO L87 Difference]: Start difference. First operand 57826 states and 83810 transitions. Second operand 3 states. [2020-12-22 10:09:38,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:09:38,786 INFO L93 Difference]: Finished difference Result 113350 states and 164020 transitions. [2020-12-22 10:09:38,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:09:38,786 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 112 [2020-12-22 10:09:38,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:09:38,843 INFO L225 Difference]: With dead ends: 113350 [2020-12-22 10:09:38,844 INFO L226 Difference]: Without dead ends: 57828 [2020-12-22 10:09:38,879 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 10:09:38,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57828 states. [2020-12-22 10:09:43,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57828 to 57826. [2020-12-22 10:09:43,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57826 states. [2020-12-22 10:09:43,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57826 states to 57826 states and 83122 transitions. [2020-12-22 10:09:43,697 INFO L78 Accepts]: Start accepts. Automaton has 57826 states and 83122 transitions. Word has length 112 [2020-12-22 10:09:43,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:09:43,697 INFO L481 AbstractCegarLoop]: Abstraction has 57826 states and 83122 transitions. [2020-12-22 10:09:43,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:09:43,697 INFO L276 IsEmpty]: Start isEmpty. Operand 57826 states and 83122 transitions. [2020-12-22 10:09:43,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:09:43,702 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:09:43,703 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:09:43,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 10:09:43,703 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:09:43,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:09:43,703 INFO L82 PathProgramCache]: Analyzing trace with hash -734589639, now seen corresponding path program 1 times [2020-12-22 10:09:43,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:09:43,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080977567] [2020-12-22 10:09:43,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:09:43,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:09:43,778 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:09:43,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080977567] [2020-12-22 10:09:43,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:09:43,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:09:43,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648407651] [2020-12-22 10:09:43,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:09:43,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:09:43,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:09:43,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:09:43,781 INFO L87 Difference]: Start difference. First operand 57826 states and 83122 transitions. Second operand 3 states. [2020-12-22 10:09:46,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:09:46,426 INFO L93 Difference]: Finished difference Result 85590 states and 122884 transitions. [2020-12-22 10:09:46,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:09:46,426 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 112 [2020-12-22 10:09:46,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:09:46,456 INFO L225 Difference]: With dead ends: 85590 [2020-12-22 10:09:46,456 INFO L226 Difference]: Without dead ends: 30068 [2020-12-22 10:09:46,476 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 10:09:46,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30068 states. [2020-12-22 10:09:48,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30068 to 30066. [2020-12-22 10:09:48,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30066 states. [2020-12-22 10:09:48,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30066 states to 30066 states and 43018 transitions. [2020-12-22 10:09:48,864 INFO L78 Accepts]: Start accepts. Automaton has 30066 states and 43018 transitions. Word has length 112 [2020-12-22 10:09:48,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:09:48,864 INFO L481 AbstractCegarLoop]: Abstraction has 30066 states and 43018 transitions. [2020-12-22 10:09:48,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:09:48,864 INFO L276 IsEmpty]: Start isEmpty. Operand 30066 states and 43018 transitions. [2020-12-22 10:09:48,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:09:48,868 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:09:48,868 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:09:48,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 10:09:48,868 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:09:48,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:09:48,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1644766063, now seen corresponding path program 1 times [2020-12-22 10:09:48,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:09:48,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370462445] [2020-12-22 10:09:48,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:09:48,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:09:48,933 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:09:48,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370462445] [2020-12-22 10:09:48,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:09:48,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:09:48,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701876741] [2020-12-22 10:09:48,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:09:48,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:09:48,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:09:48,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:09:48,935 INFO L87 Difference]: Start difference. First operand 30066 states and 43018 transitions. Second operand 3 states. [2020-12-22 10:09:50,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:09:50,322 INFO L93 Difference]: Finished difference Result 43950 states and 62728 transitions. [2020-12-22 10:09:50,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:09:50,323 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 112 [2020-12-22 10:09:50,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:09:50,341 INFO L225 Difference]: With dead ends: 43950 [2020-12-22 10:09:50,341 INFO L226 Difference]: Without dead ends: 16188 [2020-12-22 10:09:50,352 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 10:09:50,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16188 states. [2020-12-22 10:09:51,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16188 to 16186. [2020-12-22 10:09:51,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16186 states. [2020-12-22 10:09:51,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16186 states to 16186 states and 23138 transitions. [2020-12-22 10:09:51,549 INFO L78 Accepts]: Start accepts. Automaton has 16186 states and 23138 transitions. Word has length 112 [2020-12-22 10:09:51,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:09:51,550 INFO L481 AbstractCegarLoop]: Abstraction has 16186 states and 23138 transitions. [2020-12-22 10:09:51,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:09:51,550 INFO L276 IsEmpty]: Start isEmpty. Operand 16186 states and 23138 transitions. [2020-12-22 10:09:51,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:09:51,552 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:09:51,553 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:09:51,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 10:09:51,553 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:09:51,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:09:51,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1063598939, now seen corresponding path program 1 times [2020-12-22 10:09:51,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:09:51,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207639775] [2020-12-22 10:09:51,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:09:51,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:09:51,617 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:09:51,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207639775] [2020-12-22 10:09:51,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:09:51,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:09:51,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184385636] [2020-12-22 10:09:51,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:09:51,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:09:51,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:09:51,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:09:51,619 INFO L87 Difference]: Start difference. First operand 16186 states and 23138 transitions. Second operand 3 states. [2020-12-22 10:09:52,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:09:52,275 INFO L93 Difference]: Finished difference Result 23130 states and 32908 transitions. [2020-12-22 10:09:52,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:09:52,276 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 112 [2020-12-22 10:09:52,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:09:52,284 INFO L225 Difference]: With dead ends: 23130 [2020-12-22 10:09:52,284 INFO L226 Difference]: Without dead ends: 9248 [2020-12-22 10:09:52,289 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 10:09:52,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9248 states. [2020-12-22 10:09:52,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9248 to 9246. [2020-12-22 10:09:52,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9246 states. [2020-12-22 10:09:52,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9246 states to 9246 states and 13284 transitions. [2020-12-22 10:09:52,832 INFO L78 Accepts]: Start accepts. Automaton has 9246 states and 13284 transitions. Word has length 112 [2020-12-22 10:09:52,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:09:52,832 INFO L481 AbstractCegarLoop]: Abstraction has 9246 states and 13284 transitions. [2020-12-22 10:09:52,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:09:52,832 INFO L276 IsEmpty]: Start isEmpty. Operand 9246 states and 13284 transitions. [2020-12-22 10:09:52,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:09:52,834 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:09:52,834 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 10:09:52,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 10:09:52,834 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:09:52,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:09:52,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1150717733, now seen corresponding path program 1 times [2020-12-22 10:09:52,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:09:52,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320469287] [2020-12-22 10:09:52,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:09:52,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:09:53,231 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:09:53,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320469287] [2020-12-22 10:09:53,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159425607] [2020-12-22 10:09:53,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:09:53,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:09:53,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 10:09:53,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:09:53,835 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:09:53,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:09:53,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4] total 16 [2020-12-22 10:09:53,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951556519] [2020-12-22 10:09:53,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:09:53,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:09:53,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:09:53,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:09:53,837 INFO L87 Difference]: Start difference. First operand 9246 states and 13284 transitions. Second operand 16 states. [2020-12-22 10:09:57,756 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2020-12-22 10:09:58,028 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2020-12-22 10:10:02,040 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-12-22 10:10:03,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:10:03,540 INFO L93 Difference]: Finished difference Result 55442 states and 76641 transitions. [2020-12-22 10:10:03,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-12-22 10:10:03,541 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 112 [2020-12-22 10:10:03,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:10:03,670 INFO L225 Difference]: With dead ends: 55442 [2020-12-22 10:10:03,671 INFO L226 Difference]: Without dead ends: 48500 [2020-12-22 10:10:03,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1772 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=944, Invalid=4606, Unknown=0, NotChecked=0, Total=5550 [2020-12-22 10:10:03,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48500 states. [2020-12-22 10:10:07,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48500 to 31708. [2020-12-22 10:10:07,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31708 states. [2020-12-22 10:10:07,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31708 states to 31708 states and 43894 transitions. [2020-12-22 10:10:07,154 INFO L78 Accepts]: Start accepts. Automaton has 31708 states and 43894 transitions. Word has length 112 [2020-12-22 10:10:07,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:10:07,155 INFO L481 AbstractCegarLoop]: Abstraction has 31708 states and 43894 transitions. [2020-12-22 10:10:07,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:10:07,155 INFO L276 IsEmpty]: Start isEmpty. Operand 31708 states and 43894 transitions. [2020-12-22 10:10:07,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:10:07,160 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:10:07,160 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 10:10:07,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 10:10:07,375 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:10:07,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:10:07,376 INFO L82 PathProgramCache]: Analyzing trace with hash 192689075, now seen corresponding path program 1 times [2020-12-22 10:10:07,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:10:07,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462327028] [2020-12-22 10:10:07,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:10:07,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:10:07,668 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:10:07,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462327028] [2020-12-22 10:10:07,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394334254] [2020-12-22 10:10:07,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:10:07,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:10:07,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 10:10:07,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:10:08,086 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:10:08,389 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:10:08,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:10:08,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 10:10:08,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056479968] [2020-12-22 10:10:08,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:10:08,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:10:08,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:10:08,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:10:08,392 INFO L87 Difference]: Start difference. First operand 31708 states and 43894 transitions. Second operand 17 states. [2020-12-22 10:10:22,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:10:22,286 INFO L93 Difference]: Finished difference Result 129742 states and 176189 transitions. [2020-12-22 10:10:22,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 10:10:22,287 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 113 [2020-12-22 10:10:22,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:10:22,422 INFO L225 Difference]: With dead ends: 129742 [2020-12-22 10:10:22,422 INFO L226 Difference]: Without dead ends: 108473 [2020-12-22 10:10:22,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=403, Invalid=1237, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 10:10:22,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108473 states. [2020-12-22 10:10:29,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108473 to 63850. [2020-12-22 10:10:29,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63850 states. [2020-12-22 10:10:29,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63850 states to 63850 states and 87581 transitions. [2020-12-22 10:10:29,905 INFO L78 Accepts]: Start accepts. Automaton has 63850 states and 87581 transitions. Word has length 113 [2020-12-22 10:10:29,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:10:29,905 INFO L481 AbstractCegarLoop]: Abstraction has 63850 states and 87581 transitions. [2020-12-22 10:10:29,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:10:29,905 INFO L276 IsEmpty]: Start isEmpty. Operand 63850 states and 87581 transitions. [2020-12-22 10:10:29,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:10:29,908 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:10:29,908 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 10:10:30,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 10:10:30,110 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:10:30,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:10:30,110 INFO L82 PathProgramCache]: Analyzing trace with hash 2123021299, now seen corresponding path program 1 times [2020-12-22 10:10:30,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:10:30,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286035039] [2020-12-22 10:10:30,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:10:30,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:10:30,558 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:10:30,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286035039] [2020-12-22 10:10:30,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328566497] [2020-12-22 10:10:30,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:10:30,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:10:30,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 10:10:30,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:10:30,921 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:10:31,253 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:10:31,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:10:31,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 21 [2020-12-22 10:10:31,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511756496] [2020-12-22 10:10:31,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 10:10:31,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:10:31,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 10:10:31,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2020-12-22 10:10:31,255 INFO L87 Difference]: Start difference. First operand 63850 states and 87581 transitions. Second operand 22 states. [2020-12-22 10:10:31,385 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:10:33,531 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:10:33,972 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:10:34,405 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2020-12-22 10:10:35,814 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:10:37,610 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:10:38,001 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:10:39,952 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:10:40,110 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-12-22 10:10:40,245 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-12-22 10:10:40,568 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 10:10:40,739 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-12-22 10:10:40,879 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-12-22 10:10:41,012 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-12-22 10:10:42,165 WARN L197 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-12-22 10:10:42,347 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-12-22 10:10:42,731 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 10:10:43,035 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:10:45,172 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2020-12-22 10:10:45,401 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2020-12-22 10:10:45,587 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2020-12-22 10:10:45,859 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2020-12-22 10:11:05,820 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:11:20,165 WARN L197 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-12-22 10:11:21,419 WARN L197 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:11:29,663 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 10:11:31,691 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:11:31,845 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-12-22 10:11:32,104 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 10:11:34,115 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46