/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/seq-mthreaded/pals_lcr.8.1.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:38:08,241 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:38:08,244 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:38:08,279 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:38:08,279 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:38:08,281 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:38:08,283 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:38:08,285 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:38:08,304 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:38:08,305 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:38:08,306 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:38:08,307 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:38:08,308 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:38:08,309 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:38:08,310 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:38:08,312 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:38:08,313 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:38:08,314 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:38:08,316 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:38:08,318 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:38:08,320 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:38:08,321 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:38:08,322 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:38:08,323 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:38:08,326 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:38:08,330 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 07:38:08,331 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 07:38:08,332 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 07:38:08,332 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 07:38:08,334 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 07:38:08,334 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 07:38:08,335 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 07:38:08,335 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 07:38:08,335 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:38:08,336 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:38:08,337 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:38:08,338 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:38:08,369 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:38:08,370 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:38:08,371 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:38:08,372 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:38:08,372 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:38:08,372 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:38:08,373 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:38:08,373 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:38:08,373 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:38:08,374 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:38:08,374 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:38:08,374 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:38:08,374 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:38:08,375 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:38:08,375 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:38:08,375 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:38:08,375 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:38:08,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:38:08,376 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:38:08,376 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:38:08,377 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:38:08,377 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:38:08,377 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:38:08,377 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:38:08,378 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:38:08,378 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:38:08,718 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:38:08,746 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:38:08,749 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:38:08,750 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:38:08,751 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:38:08,752 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.8.1.ufo.UNBOUNDED.pals.c [2020-12-22 07:38:08,837 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1d47d9d2/c0a6cbb9da1240ae94afa3a2c8910f37/FLAGc07b21039 [2020-12-22 07:38:09,445 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:38:09,446 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.8.1.ufo.UNBOUNDED.pals.c [2020-12-22 07:38:09,461 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1d47d9d2/c0a6cbb9da1240ae94afa3a2c8910f37/FLAGc07b21039 [2020-12-22 07:38:09,762 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1d47d9d2/c0a6cbb9da1240ae94afa3a2c8910f37 [2020-12-22 07:38:09,769 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:38:09,776 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:38:09,780 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:38:09,780 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:38:09,785 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:38:09,786 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:38:09" (1/1) ... [2020-12-22 07:38:09,788 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c3466d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:38:09, skipping insertion in model container [2020-12-22 07:38:09,788 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:38:09" (1/1) ... [2020-12-22 07:38:09,800 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:38:09,870 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:38:10,127 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/seq-mthreaded/pals_lcr.8.1.ufo.UNBOUNDED.pals.c[26518,26531] [2020-12-22 07:38:10,136 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:38:10,162 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:38:10,306 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/seq-mthreaded/pals_lcr.8.1.ufo.UNBOUNDED.pals.c[26518,26531] [2020-12-22 07:38:10,309 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:38:10,342 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:38:10,342 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:38:10 WrapperNode [2020-12-22 07:38:10,342 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:38:10,343 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:38:10,344 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:38:10,344 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:38:10,352 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:38:10" (1/1) ... [2020-12-22 07:38:10,367 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:38:10" (1/1) ... [2020-12-22 07:38:10,440 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:38:10,441 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:38:10,442 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:38:10,442 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:38:10,461 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:38:10" (1/1) ... [2020-12-22 07:38:10,461 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:38:10" (1/1) ... [2020-12-22 07:38:10,471 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:38:10" (1/1) ... [2020-12-22 07:38:10,472 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:38:10" (1/1) ... [2020-12-22 07:38:10,499 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:38:10" (1/1) ... [2020-12-22 07:38:10,519 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:38:10" (1/1) ... [2020-12-22 07:38:10,525 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:38:10" (1/1) ... [2020-12-22 07:38:10,538 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:38:10,539 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:38:10,539 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:38:10,540 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:38:10,543 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:38:10" (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 07:38:10,636 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:38:10,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:38:10,637 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:38:10,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:38:11,494 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:38:11,495 INFO L299 CfgBuilder]: Removed 29 assume(true) statements. [2020-12-22 07:38:11,497 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:38:11 BoogieIcfgContainer [2020-12-22 07:38:11,498 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:38:11,501 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:38:11,501 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:38:11,504 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:38:11,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:38:09" (1/3) ... [2020-12-22 07:38:11,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dc5c5b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:38:11, skipping insertion in model container [2020-12-22 07:38:11,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:38:10" (2/3) ... [2020-12-22 07:38:11,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dc5c5b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:38:11, skipping insertion in model container [2020-12-22 07:38:11,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:38:11" (3/3) ... [2020-12-22 07:38:11,508 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.8.1.ufo.UNBOUNDED.pals.c [2020-12-22 07:38:11,514 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:38:11,520 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:38:11,539 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:38:11,568 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:38:11,568 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:38:11,568 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:38:11,569 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:38:11,569 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:38:11,569 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:38:11,569 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:38:11,569 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:38:11,589 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states. [2020-12-22 07:38:11,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-22 07:38:11,599 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:38:11,600 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:38:11,600 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:38:11,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:38:11,607 INFO L82 PathProgramCache]: Analyzing trace with hash 118130595, now seen corresponding path program 1 times [2020-12-22 07:38:11,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:38:11,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984073319] [2020-12-22 07:38:11,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:38:11,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:38:11,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:38:11,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984073319] [2020-12-22 07:38:11,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:38:11,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:38:11,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010566197] [2020-12-22 07:38:11,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:38:11,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:38:11,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:38:11,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:38:11,936 INFO L87 Difference]: Start difference. First operand 148 states. Second operand 2 states. [2020-12-22 07:38:11,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:38:11,971 INFO L93 Difference]: Finished difference Result 226 states and 385 transitions. [2020-12-22 07:38:11,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:38:11,973 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 45 [2020-12-22 07:38:11,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:38:11,986 INFO L225 Difference]: With dead ends: 226 [2020-12-22 07:38:11,987 INFO L226 Difference]: Without dead ends: 144 [2020-12-22 07:38:11,990 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 07:38:12,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-12-22 07:38:12,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2020-12-22 07:38:12,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-12-22 07:38:12,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 251 transitions. [2020-12-22 07:38:12,044 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 251 transitions. Word has length 45 [2020-12-22 07:38:12,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:38:12,044 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 251 transitions. [2020-12-22 07:38:12,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:38:12,045 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 251 transitions. [2020-12-22 07:38:12,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-22 07:38:12,048 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:38:12,048 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] [2020-12-22 07:38:12,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:38:12,049 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:38:12,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:38:12,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1253676703, now seen corresponding path program 1 times [2020-12-22 07:38:12,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:38:12,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846082103] [2020-12-22 07:38:12,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:38:12,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:38:12,261 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 07:38:12,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846082103] [2020-12-22 07:38:12,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:38:12,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:38:12,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622939016] [2020-12-22 07:38:12,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:38:12,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:38:12,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:38:12,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:38:12,269 INFO L87 Difference]: Start difference. First operand 144 states and 251 transitions. Second operand 5 states. [2020-12-22 07:38:12,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:38:12,473 INFO L93 Difference]: Finished difference Result 225 states and 378 transitions. [2020-12-22 07:38:12,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:38:12,474 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 45 [2020-12-22 07:38:12,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:38:12,479 INFO L225 Difference]: With dead ends: 225 [2020-12-22 07:38:12,479 INFO L226 Difference]: Without dead ends: 144 [2020-12-22 07:38:12,481 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 07:38:12,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-12-22 07:38:12,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2020-12-22 07:38:12,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-12-22 07:38:12,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 190 transitions. [2020-12-22 07:38:12,508 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 190 transitions. Word has length 45 [2020-12-22 07:38:12,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:38:12,509 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 190 transitions. [2020-12-22 07:38:12,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:38:12,511 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 190 transitions. [2020-12-22 07:38:12,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-22 07:38:12,519 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:38:12,519 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:38:12,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:38:12,520 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:38:12,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:38:12,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1781682001, now seen corresponding path program 1 times [2020-12-22 07:38:12,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:38:12,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156514828] [2020-12-22 07:38:12,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:38:12,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:38:12,812 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 07:38:12,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156514828] [2020-12-22 07:38:12,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:38:12,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:38:12,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666918126] [2020-12-22 07:38:12,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:38:12,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:38:12,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:38:12,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:38:12,817 INFO L87 Difference]: Start difference. First operand 144 states and 190 transitions. Second operand 3 states. [2020-12-22 07:38:12,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:38:12,840 INFO L93 Difference]: Finished difference Result 292 states and 426 transitions. [2020-12-22 07:38:12,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:38:12,841 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 105 [2020-12-22 07:38:12,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:38:12,843 INFO L225 Difference]: With dead ends: 292 [2020-12-22 07:38:12,843 INFO L226 Difference]: Without dead ends: 215 [2020-12-22 07:38:12,844 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 07:38:12,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-12-22 07:38:12,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 213. [2020-12-22 07:38:12,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-12-22 07:38:12,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 301 transitions. [2020-12-22 07:38:12,860 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 301 transitions. Word has length 105 [2020-12-22 07:38:12,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:38:12,861 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 301 transitions. [2020-12-22 07:38:12,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:38:12,861 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 301 transitions. [2020-12-22 07:38:12,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-22 07:38:12,863 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:38:12,863 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:38:12,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:38:12,864 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:38:12,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:38:12,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1036099271, now seen corresponding path program 1 times [2020-12-22 07:38:12,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:38:12,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604381016] [2020-12-22 07:38:12,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:38:12,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:38:12,991 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 07:38:12,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604381016] [2020-12-22 07:38:12,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:38:12,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:38:12,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324650744] [2020-12-22 07:38:12,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:38:12,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:38:12,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:38:12,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:38:12,994 INFO L87 Difference]: Start difference. First operand 213 states and 301 transitions. Second operand 3 states. [2020-12-22 07:38:13,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:38:13,046 INFO L93 Difference]: Finished difference Result 493 states and 749 transitions. [2020-12-22 07:38:13,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:38:13,048 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 105 [2020-12-22 07:38:13,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:38:13,053 INFO L225 Difference]: With dead ends: 493 [2020-12-22 07:38:13,053 INFO L226 Difference]: Without dead ends: 347 [2020-12-22 07:38:13,054 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 07:38:13,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-12-22 07:38:13,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 345. [2020-12-22 07:38:13,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2020-12-22 07:38:13,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 512 transitions. [2020-12-22 07:38:13,077 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 512 transitions. Word has length 105 [2020-12-22 07:38:13,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:38:13,079 INFO L481 AbstractCegarLoop]: Abstraction has 345 states and 512 transitions. [2020-12-22 07:38:13,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:38:13,079 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 512 transitions. [2020-12-22 07:38:13,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-22 07:38:13,081 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:38:13,081 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:38:13,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:38:13,082 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:38:13,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:38:13,082 INFO L82 PathProgramCache]: Analyzing trace with hash -903931587, now seen corresponding path program 1 times [2020-12-22 07:38:13,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:38:13,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595704770] [2020-12-22 07:38:13,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:38:13,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:38:13,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:38:13,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595704770] [2020-12-22 07:38:13,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:38:13,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:38:13,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224295820] [2020-12-22 07:38:13,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:38:13,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:38:13,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:38:13,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:38:13,204 INFO L87 Difference]: Start difference. First operand 345 states and 512 transitions. Second operand 3 states. [2020-12-22 07:38:13,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:38:13,245 INFO L93 Difference]: Finished difference Result 877 states and 1362 transitions. [2020-12-22 07:38:13,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:38:13,246 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 105 [2020-12-22 07:38:13,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:38:13,253 INFO L225 Difference]: With dead ends: 877 [2020-12-22 07:38:13,254 INFO L226 Difference]: Without dead ends: 599 [2020-12-22 07:38:13,255 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 07:38:13,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2020-12-22 07:38:13,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 597. [2020-12-22 07:38:13,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 597 states. [2020-12-22 07:38:13,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 912 transitions. [2020-12-22 07:38:13,288 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 912 transitions. Word has length 105 [2020-12-22 07:38:13,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:38:13,289 INFO L481 AbstractCegarLoop]: Abstraction has 597 states and 912 transitions. [2020-12-22 07:38:13,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:38:13,289 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 912 transitions. [2020-12-22 07:38:13,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-22 07:38:13,293 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:38:13,294 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:38:13,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:38:13,294 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:38:13,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:38:13,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1796751027, now seen corresponding path program 1 times [2020-12-22 07:38:13,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:38:13,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633140922] [2020-12-22 07:38:13,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:38:13,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:38:13,449 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 07:38:13,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633140922] [2020-12-22 07:38:13,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:38:13,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:38:13,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662188746] [2020-12-22 07:38:13,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:38:13,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:38:13,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:38:13,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:38:13,453 INFO L87 Difference]: Start difference. First operand 597 states and 912 transitions. Second operand 3 states. [2020-12-22 07:38:13,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:38:13,505 INFO L93 Difference]: Finished difference Result 1609 states and 2522 transitions. [2020-12-22 07:38:13,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:38:13,506 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 105 [2020-12-22 07:38:13,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:38:13,515 INFO L225 Difference]: With dead ends: 1609 [2020-12-22 07:38:13,516 INFO L226 Difference]: Without dead ends: 1079 [2020-12-22 07:38:13,517 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 07:38:13,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1079 states. [2020-12-22 07:38:13,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1079 to 1077. [2020-12-22 07:38:13,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1077 states. [2020-12-22 07:38:13,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1077 states to 1077 states and 1668 transitions. [2020-12-22 07:38:13,559 INFO L78 Accepts]: Start accepts. Automaton has 1077 states and 1668 transitions. Word has length 105 [2020-12-22 07:38:13,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:38:13,560 INFO L481 AbstractCegarLoop]: Abstraction has 1077 states and 1668 transitions. [2020-12-22 07:38:13,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:38:13,560 INFO L276 IsEmpty]: Start isEmpty. Operand 1077 states and 1668 transitions. [2020-12-22 07:38:13,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-22 07:38:13,562 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:38:13,562 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:38:13,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:38:13,563 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:38:13,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:38:13,564 INFO L82 PathProgramCache]: Analyzing trace with hash 2134544169, now seen corresponding path program 1 times [2020-12-22 07:38:13,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:38:13,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235681990] [2020-12-22 07:38:13,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:38:13,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:38:13,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:38:13,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235681990] [2020-12-22 07:38:13,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:38:13,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:38:13,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134283677] [2020-12-22 07:38:13,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:38:13,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:38:13,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:38:13,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:38:13,755 INFO L87 Difference]: Start difference. First operand 1077 states and 1668 transitions. Second operand 3 states. [2020-12-22 07:38:13,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:38:13,818 INFO L93 Difference]: Finished difference Result 3001 states and 4710 transitions. [2020-12-22 07:38:13,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:38:13,819 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 105 [2020-12-22 07:38:13,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:38:13,831 INFO L225 Difference]: With dead ends: 3001 [2020-12-22 07:38:13,831 INFO L226 Difference]: Without dead ends: 1991 [2020-12-22 07:38:13,834 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 07:38:13,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1991 states. [2020-12-22 07:38:13,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1991 to 1989. [2020-12-22 07:38:13,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1989 states. [2020-12-22 07:38:13,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1989 states to 1989 states and 3092 transitions. [2020-12-22 07:38:13,908 INFO L78 Accepts]: Start accepts. Automaton has 1989 states and 3092 transitions. Word has length 105 [2020-12-22 07:38:13,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:38:13,910 INFO L481 AbstractCegarLoop]: Abstraction has 1989 states and 3092 transitions. [2020-12-22 07:38:13,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:38:13,910 INFO L276 IsEmpty]: Start isEmpty. Operand 1989 states and 3092 transitions. [2020-12-22 07:38:13,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-22 07:38:13,911 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:38:13,911 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:38:13,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:38:13,913 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:38:13,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:38:13,915 INFO L82 PathProgramCache]: Analyzing trace with hash -942437729, now seen corresponding path program 1 times [2020-12-22 07:38:13,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:38:13,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147258151] [2020-12-22 07:38:13,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:38:13,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:38:14,232 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 07:38:14,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147258151] [2020-12-22 07:38:14,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:38:14,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 07:38:14,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023230256] [2020-12-22 07:38:14,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 07:38:14,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:38:14,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 07:38:14,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 07:38:14,237 INFO L87 Difference]: Start difference. First operand 1989 states and 3092 transitions. Second operand 10 states. [2020-12-22 07:38:16,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:38:16,291 INFO L93 Difference]: Finished difference Result 32741 states and 51492 transitions. [2020-12-22 07:38:16,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 07:38:16,292 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 105 [2020-12-22 07:38:16,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:38:16,449 INFO L225 Difference]: With dead ends: 32741 [2020-12-22 07:38:16,450 INFO L226 Difference]: Without dead ends: 30819 [2020-12-22 07:38:16,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2020-12-22 07:38:16,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30819 states. [2020-12-22 07:38:17,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30819 to 3909. [2020-12-22 07:38:17,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3909 states. [2020-12-22 07:38:17,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3909 states to 3909 states and 6052 transitions. [2020-12-22 07:38:17,062 INFO L78 Accepts]: Start accepts. Automaton has 3909 states and 6052 transitions. Word has length 105 [2020-12-22 07:38:17,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:38:17,062 INFO L481 AbstractCegarLoop]: Abstraction has 3909 states and 6052 transitions. [2020-12-22 07:38:17,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 07:38:17,062 INFO L276 IsEmpty]: Start isEmpty. Operand 3909 states and 6052 transitions. [2020-12-22 07:38:17,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-12-22 07:38:17,064 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:38:17,064 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:38:17,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:38:17,064 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:38:17,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:38:17,065 INFO L82 PathProgramCache]: Analyzing trace with hash -860244721, now seen corresponding path program 1 times [2020-12-22 07:38:17,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:38:17,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094275835] [2020-12-22 07:38:17,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:38:17,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:38:17,185 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 07:38:17,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094275835] [2020-12-22 07:38:17,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:38:17,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:38:17,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026951446] [2020-12-22 07:38:17,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:38:17,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:38:17,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:38:17,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:38:17,193 INFO L87 Difference]: Start difference. First operand 3909 states and 6052 transitions. Second operand 3 states. [2020-12-22 07:38:17,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:38:17,732 INFO L93 Difference]: Finished difference Result 11241 states and 17414 transitions. [2020-12-22 07:38:17,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:38:17,733 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 107 [2020-12-22 07:38:17,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:38:17,749 INFO L225 Difference]: With dead ends: 11241 [2020-12-22 07:38:17,750 INFO L226 Difference]: Without dead ends: 7399 [2020-12-22 07:38:17,757 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 07:38:17,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7399 states. [2020-12-22 07:38:18,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7399 to 7333. [2020-12-22 07:38:18,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7333 states. [2020-12-22 07:38:18,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7333 states to 7333 states and 11204 transitions. [2020-12-22 07:38:18,309 INFO L78 Accepts]: Start accepts. Automaton has 7333 states and 11204 transitions. Word has length 107 [2020-12-22 07:38:18,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:38:18,309 INFO L481 AbstractCegarLoop]: Abstraction has 7333 states and 11204 transitions. [2020-12-22 07:38:18,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:38:18,309 INFO L276 IsEmpty]: Start isEmpty. Operand 7333 states and 11204 transitions. [2020-12-22 07:38:18,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-12-22 07:38:18,311 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:38:18,311 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:38:18,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:38:18,311 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:38:18,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:38:18,312 INFO L82 PathProgramCache]: Analyzing trace with hash -793751209, now seen corresponding path program 1 times [2020-12-22 07:38:18,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:38:18,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188186723] [2020-12-22 07:38:18,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:38:18,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:38:18,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:38:18,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188186723] [2020-12-22 07:38:18,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:38:18,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 07:38:18,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690981623] [2020-12-22 07:38:18,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 07:38:18,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:38:18,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 07:38:18,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-12-22 07:38:18,915 INFO L87 Difference]: Start difference. First operand 7333 states and 11204 transitions. Second operand 10 states. [2020-12-22 07:38:20,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:38:20,248 INFO L93 Difference]: Finished difference Result 18219 states and 27943 transitions. [2020-12-22 07:38:20,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 07:38:20,250 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 107 [2020-12-22 07:38:20,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:38:20,273 INFO L225 Difference]: With dead ends: 18219 [2020-12-22 07:38:20,274 INFO L226 Difference]: Without dead ends: 10953 [2020-12-22 07:38:20,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2020-12-22 07:38:20,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10953 states. [2020-12-22 07:38:20,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10953 to 7333. [2020-12-22 07:38:20,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7333 states. [2020-12-22 07:38:20,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7333 states to 7333 states and 11140 transitions. [2020-12-22 07:38:20,998 INFO L78 Accepts]: Start accepts. Automaton has 7333 states and 11140 transitions. Word has length 107 [2020-12-22 07:38:20,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:38:20,998 INFO L481 AbstractCegarLoop]: Abstraction has 7333 states and 11140 transitions. [2020-12-22 07:38:20,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 07:38:20,998 INFO L276 IsEmpty]: Start isEmpty. Operand 7333 states and 11140 transitions. [2020-12-22 07:38:21,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-12-22 07:38:21,000 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:38:21,000 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:38:21,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:38:21,001 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:38:21,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:38:21,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1539759597, now seen corresponding path program 1 times [2020-12-22 07:38:21,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:38:21,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967137335] [2020-12-22 07:38:21,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:38:21,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:38:21,101 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 07:38:21,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967137335] [2020-12-22 07:38:21,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:38:21,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:38:21,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647868568] [2020-12-22 07:38:21,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:38:21,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:38:21,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:38:21,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:38:21,104 INFO L87 Difference]: Start difference. First operand 7333 states and 11140 transitions. Second operand 3 states. [2020-12-22 07:38:21,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:38:21,895 INFO L93 Difference]: Finished difference Result 21097 states and 32006 transitions. [2020-12-22 07:38:21,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:38:21,895 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 107 [2020-12-22 07:38:21,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:38:21,925 INFO L225 Difference]: With dead ends: 21097 [2020-12-22 07:38:21,926 INFO L226 Difference]: Without dead ends: 13831 [2020-12-22 07:38:21,938 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 07:38:21,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13831 states. [2020-12-22 07:38:22,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13831 to 13829. [2020-12-22 07:38:22,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13829 states. [2020-12-22 07:38:22,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13829 states to 13829 states and 20804 transitions. [2020-12-22 07:38:22,888 INFO L78 Accepts]: Start accepts. Automaton has 13829 states and 20804 transitions. Word has length 107 [2020-12-22 07:38:22,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:38:22,889 INFO L481 AbstractCegarLoop]: Abstraction has 13829 states and 20804 transitions. [2020-12-22 07:38:22,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:38:22,889 INFO L276 IsEmpty]: Start isEmpty. Operand 13829 states and 20804 transitions. [2020-12-22 07:38:22,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-12-22 07:38:22,890 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:38:22,891 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:38:22,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:38:22,891 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:38:22,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:38:22,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1642858163, now seen corresponding path program 1 times [2020-12-22 07:38:22,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:38:22,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652220017] [2020-12-22 07:38:22,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:38:22,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:38:22,972 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 07:38:22,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652220017] [2020-12-22 07:38:22,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:38:22,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:38:22,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998576937] [2020-12-22 07:38:22,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:38:22,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:38:22,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:38:22,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:38:22,974 INFO L87 Difference]: Start difference. First operand 13829 states and 20804 transitions. Second operand 3 states. [2020-12-22 07:38:24,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:38:24,872 INFO L93 Difference]: Finished difference Result 39817 states and 59718 transitions. [2020-12-22 07:38:24,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:38:24,872 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 107 [2020-12-22 07:38:24,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:38:24,927 INFO L225 Difference]: With dead ends: 39817 [2020-12-22 07:38:24,928 INFO L226 Difference]: Without dead ends: 26055 [2020-12-22 07:38:25,040 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 07:38:25,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26055 states. [2020-12-22 07:38:26,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26055 to 26053. [2020-12-22 07:38:26,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26053 states. [2020-12-22 07:38:26,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26053 states to 26053 states and 38724 transitions. [2020-12-22 07:38:26,912 INFO L78 Accepts]: Start accepts. Automaton has 26053 states and 38724 transitions. Word has length 107 [2020-12-22 07:38:26,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:38:26,913 INFO L481 AbstractCegarLoop]: Abstraction has 26053 states and 38724 transitions. [2020-12-22 07:38:26,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:38:26,913 INFO L276 IsEmpty]: Start isEmpty. Operand 26053 states and 38724 transitions. [2020-12-22 07:38:26,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 07:38:26,914 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:38:26,914 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:38:26,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:38:26,915 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:38:26,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:38:26,915 INFO L82 PathProgramCache]: Analyzing trace with hash 748793536, now seen corresponding path program 1 times [2020-12-22 07:38:26,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:38:26,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322314825] [2020-12-22 07:38:26,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:38:26,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:38:27,047 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 07:38:27,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322314825] [2020-12-22 07:38:27,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:38:27,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:38:27,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310151674] [2020-12-22 07:38:27,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:38:27,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:38:27,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:38:27,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:38:27,050 INFO L87 Difference]: Start difference. First operand 26053 states and 38724 transitions. Second operand 8 states. [2020-12-22 07:38:30,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:38:30,218 INFO L93 Difference]: Finished difference Result 45423 states and 67129 transitions. [2020-12-22 07:38:30,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 07:38:30,218 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 108 [2020-12-22 07:38:30,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:38:30,273 INFO L225 Difference]: With dead ends: 45423 [2020-12-22 07:38:30,274 INFO L226 Difference]: Without dead ends: 45421 [2020-12-22 07:38:30,292 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 07:38:30,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45421 states. [2020-12-22 07:38:32,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45421 to 26821. [2020-12-22 07:38:32,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26821 states. [2020-12-22 07:38:32,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26821 states to 26821 states and 39364 transitions. [2020-12-22 07:38:32,271 INFO L78 Accepts]: Start accepts. Automaton has 26821 states and 39364 transitions. Word has length 108 [2020-12-22 07:38:32,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:38:32,271 INFO L481 AbstractCegarLoop]: Abstraction has 26821 states and 39364 transitions. [2020-12-22 07:38:32,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:38:32,272 INFO L276 IsEmpty]: Start isEmpty. Operand 26821 states and 39364 transitions. [2020-12-22 07:38:32,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-22 07:38:32,273 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:38:32,273 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:38:32,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:38:32,274 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:38:32,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:38:32,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1878838190, now seen corresponding path program 1 times [2020-12-22 07:38:32,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:38:32,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443118972] [2020-12-22 07:38:32,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:38:32,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:38:32,355 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 07:38:32,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443118972] [2020-12-22 07:38:32,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:38:32,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:38:32,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781309510] [2020-12-22 07:38:32,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:38:32,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:38:32,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:38:32,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:38:32,357 INFO L87 Difference]: Start difference. First operand 26821 states and 39364 transitions. Second operand 3 states. [2020-12-22 07:38:35,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:38:35,245 INFO L93 Difference]: Finished difference Result 53964 states and 79562 transitions. [2020-12-22 07:38:35,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:38:35,245 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 109 [2020-12-22 07:38:35,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:38:35,291 INFO L225 Difference]: With dead ends: 53964 [2020-12-22 07:38:35,291 INFO L226 Difference]: Without dead ends: 39369 [2020-12-22 07:38:35,311 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 07:38:35,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39369 states. [2020-12-22 07:38:37,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39369 to 39367. [2020-12-22 07:38:37,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39367 states. [2020-12-22 07:38:37,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39367 states to 39367 states and 57542 transitions. [2020-12-22 07:38:37,994 INFO L78 Accepts]: Start accepts. Automaton has 39367 states and 57542 transitions. Word has length 109 [2020-12-22 07:38:37,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:38:37,995 INFO L481 AbstractCegarLoop]: Abstraction has 39367 states and 57542 transitions. [2020-12-22 07:38:37,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:38:37,995 INFO L276 IsEmpty]: Start isEmpty. Operand 39367 states and 57542 transitions. [2020-12-22 07:38:38,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-12-22 07:38:38,017 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:38:38,017 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:38:38,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:38:38,018 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:38:38,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:38:38,018 INFO L82 PathProgramCache]: Analyzing trace with hash -870003369, now seen corresponding path program 1 times [2020-12-22 07:38:38,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:38:38,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467733833] [2020-12-22 07:38:38,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:38:38,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:38:38,268 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-22 07:38:38,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467733833] [2020-12-22 07:38:38,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:38:38,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 07:38:38,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795210831] [2020-12-22 07:38:38,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 07:38:38,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:38:38,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 07:38:38,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-12-22 07:38:38,271 INFO L87 Difference]: Start difference. First operand 39367 states and 57542 transitions. Second operand 10 states. [2020-12-22 07:38:57,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:38:57,761 INFO L93 Difference]: Finished difference Result 361305 states and 528015 transitions. [2020-12-22 07:38:57,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 07:38:57,762 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 147 [2020-12-22 07:38:57,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:38:58,279 INFO L225 Difference]: With dead ends: 361305 [2020-12-22 07:38:58,280 INFO L226 Difference]: Without dead ends: 322007 [2020-12-22 07:38:58,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2020-12-22 07:38:58,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322007 states. [2020-12-22 07:39:06,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322007 to 78663. [2020-12-22 07:39:06,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78663 states. [2020-12-22 07:39:06,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78663 states to 78663 states and 114630 transitions. [2020-12-22 07:39:06,429 INFO L78 Accepts]: Start accepts. Automaton has 78663 states and 114630 transitions. Word has length 147 [2020-12-22 07:39:06,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:06,430 INFO L481 AbstractCegarLoop]: Abstraction has 78663 states and 114630 transitions. [2020-12-22 07:39:06,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 07:39:06,430 INFO L276 IsEmpty]: Start isEmpty. Operand 78663 states and 114630 transitions. [2020-12-22 07:39:06,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-12-22 07:39:06,466 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:06,466 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:39:06,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:39:06,466 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:06,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:06,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1656181111, now seen corresponding path program 1 times [2020-12-22 07:39:06,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:06,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449232344] [2020-12-22 07:39:06,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:06,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:06,735 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-22 07:39:06,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449232344] [2020-12-22 07:39:06,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:06,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 07:39:06,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625303182] [2020-12-22 07:39:06,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 07:39:06,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:06,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 07:39:06,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-12-22 07:39:06,740 INFO L87 Difference]: Start difference. First operand 78663 states and 114630 transitions. Second operand 10 states. [2020-12-22 07:39:30,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:30,046 INFO L93 Difference]: Finished difference Result 400601 states and 585103 transitions. [2020-12-22 07:39:30,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 07:39:30,047 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 147 [2020-12-22 07:39:30,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:30,769 INFO L225 Difference]: With dead ends: 400601 [2020-12-22 07:39:30,769 INFO L226 Difference]: Without dead ends: 361303 [2020-12-22 07:39:30,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2020-12-22 07:39:31,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361303 states. [2020-12-22 07:39:42,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361303 to 137671. [2020-12-22 07:39:42,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137671 states. [2020-12-22 07:39:42,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137671 states to 137671 states and 199942 transitions. [2020-12-22 07:39:42,999 INFO L78 Accepts]: Start accepts. Automaton has 137671 states and 199942 transitions. Word has length 147 [2020-12-22 07:39:43,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:43,000 INFO L481 AbstractCegarLoop]: Abstraction has 137671 states and 199942 transitions. [2020-12-22 07:39:43,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 07:39:43,000 INFO L276 IsEmpty]: Start isEmpty. Operand 137671 states and 199942 transitions. [2020-12-22 07:39:43,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-12-22 07:39:43,023 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:43,024 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:39:43,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:39:43,024 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:43,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:43,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1507146345, now seen corresponding path program 1 times [2020-12-22 07:39:43,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:43,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313644825] [2020-12-22 07:39:43,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:43,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:43,243 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 07:39:43,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313644825] [2020-12-22 07:39:43,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:43,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 07:39:43,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859920600] [2020-12-22 07:39:43,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 07:39:43,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:43,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 07:39:43,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 07:39:43,246 INFO L87 Difference]: Start difference. First operand 137671 states and 199942 transitions. Second operand 10 states. [2020-12-22 07:40:13,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:40:13,811 INFO L93 Difference]: Finished difference Result 439897 states and 642191 transitions. [2020-12-22 07:40:13,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 07:40:13,811 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 147 [2020-12-22 07:40:13,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:40:14,643 INFO L225 Difference]: With dead ends: 439897 [2020-12-22 07:40:14,643 INFO L226 Difference]: Without dead ends: 400599 [2020-12-22 07:40:14,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 07:40:15,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400599 states. [2020-12-22 07:40:31,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400599 to 176967. [2020-12-22 07:40:31,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176967 states. [2020-12-22 07:40:31,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176967 states to 176967 states and 257030 transitions. [2020-12-22 07:40:31,859 INFO L78 Accepts]: Start accepts. Automaton has 176967 states and 257030 transitions. Word has length 147 [2020-12-22 07:40:31,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:40:31,859 INFO L481 AbstractCegarLoop]: Abstraction has 176967 states and 257030 transitions. [2020-12-22 07:40:31,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 07:40:31,859 INFO L276 IsEmpty]: Start isEmpty. Operand 176967 states and 257030 transitions. [2020-12-22 07:40:31,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-12-22 07:40:31,895 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:31,895 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:40:31,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:40:31,896 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:31,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:31,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1552361911, now seen corresponding path program 1 times [2020-12-22 07:40:31,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:31,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921254415] [2020-12-22 07:40:31,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:31,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:32,152 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 07:40:32,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921254415] [2020-12-22 07:40:32,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:32,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 07:40:32,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343637784] [2020-12-22 07:40:32,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 07:40:32,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:32,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 07:40:32,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-12-22 07:40:32,157 INFO L87 Difference]: Start difference. First operand 176967 states and 257030 transitions. Second operand 10 states.