/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/array-examples/sorting_selectionsort_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 21:19:56,329 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 21:19:56,335 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 21:19:56,380 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 21:19:56,381 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 21:19:56,382 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 21:19:56,384 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 21:19:56,387 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 21:19:56,389 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 21:19:56,391 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 21:19:56,392 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 21:19:56,393 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 21:19:56,394 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 21:19:56,395 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 21:19:56,397 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 21:19:56,398 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 21:19:56,399 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 21:19:56,400 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 21:19:56,403 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 21:19:56,405 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 21:19:56,408 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 21:19:56,409 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 21:19:56,411 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 21:19:56,412 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 21:19:56,416 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 21:19:56,427 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 21:19:56,428 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 21:19:56,429 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 21:19:56,430 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 21:19:56,461 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 21:19:56,461 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 21:19:56,464 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 21:19:56,465 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 21:19:56,465 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 21:19:56,465 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 21:19:56,466 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 21:19:56,466 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 21:19:56,466 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 21:19:56,466 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 21:19:56,467 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 21:19:56,468 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 21:19:56,468 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 21:19:56,468 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 21:19:56,468 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 21:19:56,469 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 21:19:56,469 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 21:19:56,469 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:19:56,469 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 21:19:56,469 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 21:19:56,470 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 21:19:56,470 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 21:19:56,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 21:19:56,470 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 21:19:56,470 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 21:19:56,471 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 21:19:56,926 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 21:19:56,981 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 21:19:56,984 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 21:19:56,986 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 21:19:56,987 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 21:19:56,988 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/sorting_selectionsort_ground-2.i [2020-12-21 21:19:57,070 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a37eace8/d4d7b3922087488d80c8bbad461ec048/FLAGc1c1f704f [2020-12-21 21:19:57,649 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 21:19:57,649 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_selectionsort_ground-2.i [2020-12-21 21:19:57,664 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a37eace8/d4d7b3922087488d80c8bbad461ec048/FLAGc1c1f704f [2020-12-21 21:19:58,028 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a37eace8/d4d7b3922087488d80c8bbad461ec048 [2020-12-21 21:19:58,033 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 21:19:58,037 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 21:19:58,042 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 21:19:58,043 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 21:19:58,048 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 21:19:58,050 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:19:58" (1/1) ... [2020-12-21 21:19:58,053 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b0be0be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:58, skipping insertion in model container [2020-12-21 21:19:58,053 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:19:58" (1/1) ... [2020-12-21 21:19:58,066 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 21:19:58,092 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 21:19:58,316 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/array-examples/sorting_selectionsort_ground-2.i[823,836] [2020-12-21 21:19:58,370 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:19:58,387 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 21:19:58,407 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/array-examples/sorting_selectionsort_ground-2.i[823,836] [2020-12-21 21:19:58,453 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:19:58,479 INFO L208 MainTranslator]: Completed translation [2020-12-21 21:19:58,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:58 WrapperNode [2020-12-21 21:19:58,480 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 21:19:58,484 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 21:19:58,484 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 21:19:58,484 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 21:19:58,495 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:58" (1/1) ... [2020-12-21 21:19:58,519 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:58" (1/1) ... [2020-12-21 21:19:58,565 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 21:19:58,566 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 21:19:58,567 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 21:19:58,567 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 21:19:58,578 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:58" (1/1) ... [2020-12-21 21:19:58,579 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:58" (1/1) ... [2020-12-21 21:19:58,586 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:58" (1/1) ... [2020-12-21 21:19:58,586 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:58" (1/1) ... [2020-12-21 21:19:58,612 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:58" (1/1) ... [2020-12-21 21:19:58,625 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:58" (1/1) ... [2020-12-21 21:19:58,627 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:58" (1/1) ... [2020-12-21 21:19:58,637 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 21:19:58,639 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 21:19:58,639 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 21:19:58,639 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 21:19:58,640 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:58" (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 [2020-12-21 21:19:58,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 21:19:58,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 21:19:58,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 21:19:58,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 21:19:58,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 21:19:58,758 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 21:19:58,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 21:19:59,294 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 21:19:59,295 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2020-12-21 21:19:59,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:19:59 BoogieIcfgContainer [2020-12-21 21:19:59,297 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 21:19:59,298 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 21:19:59,299 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 21:19:59,302 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 21:19:59,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:19:58" (1/3) ... [2020-12-21 21:19:59,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2de4f026 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:19:59, skipping insertion in model container [2020-12-21 21:19:59,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:58" (2/3) ... [2020-12-21 21:19:59,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2de4f026 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:19:59, skipping insertion in model container [2020-12-21 21:19:59,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:19:59" (3/3) ... [2020-12-21 21:19:59,306 INFO L111 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_ground-2.i [2020-12-21 21:19:59,314 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 21:19:59,320 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-12-21 21:19:59,351 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-21 21:19:59,381 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 21:19:59,381 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 21:19:59,381 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 21:19:59,382 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 21:19:59,382 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 21:19:59,382 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 21:19:59,382 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 21:19:59,382 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 21:19:59,401 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-12-21 21:19:59,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-21 21:19:59,408 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:59,409 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:59,409 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:59,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:59,416 INFO L82 PathProgramCache]: Analyzing trace with hash 305970967, now seen corresponding path program 1 times [2020-12-21 21:19:59,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:59,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277280076] [2020-12-21 21:19:59,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:59,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:59,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:19:59,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277280076] [2020-12-21 21:19:59,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:19:59,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 21:19:59,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398799135] [2020-12-21 21:19:59,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-21 21:19:59,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:59,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-21 21:19:59,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 21:19:59,623 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2020-12-21 21:19:59,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:59,646 INFO L93 Difference]: Finished difference Result 76 states and 114 transitions. [2020-12-21 21:19:59,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-21 21:19:59,648 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-12-21 21:19:59,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:59,657 INFO L225 Difference]: With dead ends: 76 [2020-12-21 21:19:59,657 INFO L226 Difference]: Without dead ends: 36 [2020-12-21 21:19:59,661 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 [2020-12-21 21:19:59,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-21 21:19:59,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-12-21 21:19:59,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-21 21:19:59,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2020-12-21 21:19:59,700 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 10 [2020-12-21 21:19:59,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:59,700 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2020-12-21 21:19:59,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-21 21:19:59,701 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2020-12-21 21:19:59,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-21 21:19:59,701 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:59,702 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:59,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 21:19:59,702 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:59,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:59,703 INFO L82 PathProgramCache]: Analyzing trace with hash 2024314673, now seen corresponding path program 1 times [2020-12-21 21:19:59,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:59,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019066840] [2020-12-21 21:19:59,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:59,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:59,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:19:59,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019066840] [2020-12-21 21:19:59,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:19:59,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 21:19:59,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328180589] [2020-12-21 21:19:59,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:19:59,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:59,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:19:59,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:19:59,758 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand 3 states. [2020-12-21 21:19:59,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:59,788 INFO L93 Difference]: Finished difference Result 70 states and 88 transitions. [2020-12-21 21:19:59,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:19:59,789 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-12-21 21:19:59,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:59,791 INFO L225 Difference]: With dead ends: 70 [2020-12-21 21:19:59,791 INFO L226 Difference]: Without dead ends: 38 [2020-12-21 21:19:59,793 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 [2020-12-21 21:19:59,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-21 21:19:59,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-12-21 21:19:59,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-21 21:19:59,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2020-12-21 21:19:59,805 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 10 [2020-12-21 21:19:59,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:59,806 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2020-12-21 21:19:59,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:19:59,807 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2020-12-21 21:19:59,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-21 21:19:59,808 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:59,808 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:59,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-21 21:19:59,809 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:59,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:59,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1369117107, now seen corresponding path program 1 times [2020-12-21 21:19:59,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:59,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323116263] [2020-12-21 21:19:59,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:59,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:59,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:19:59,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323116263] [2020-12-21 21:19:59,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124758312] [2020-12-21 21:19:59,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:59,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:59,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-21 21:19:59,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:59,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:19:59,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:19:59,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-21 21:19:59,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681492590] [2020-12-21 21:19:59,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:19:59,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:59,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:19:59,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:19:59,999 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand 3 states. [2020-12-21 21:20:00,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:00,054 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2020-12-21 21:20:00,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:20:00,055 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-12-21 21:20:00,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:00,056 INFO L225 Difference]: With dead ends: 68 [2020-12-21 21:20:00,056 INFO L226 Difference]: Without dead ends: 59 [2020-12-21 21:20:00,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:20:00,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-21 21:20:00,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 38. [2020-12-21 21:20:00,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-21 21:20:00,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2020-12-21 21:20:00,065 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 12 [2020-12-21 21:20:00,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:00,065 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2020-12-21 21:20:00,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:20:00,065 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2020-12-21 21:20:00,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-21 21:20:00,066 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:00,066 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:00,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-21 21:20:00,281 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:00,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:00,284 INFO L82 PathProgramCache]: Analyzing trace with hash 2104069184, now seen corresponding path program 1 times [2020-12-21 21:20:00,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:00,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30988583] [2020-12-21 21:20:00,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:00,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:00,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:20:00,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30988583] [2020-12-21 21:20:00,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182534477] [2020-12-21 21:20:00,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:00,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:00,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:20:00,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:00,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:20:00,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:00,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 21:20:00,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700898026] [2020-12-21 21:20:00,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:20:00,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:00,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:20:00,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:20:00,532 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand 5 states. [2020-12-21 21:20:00,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:00,556 INFO L93 Difference]: Finished difference Result 74 states and 92 transitions. [2020-12-21 21:20:00,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:20:00,556 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-12-21 21:20:00,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:00,557 INFO L225 Difference]: With dead ends: 74 [2020-12-21 21:20:00,558 INFO L226 Difference]: Without dead ends: 41 [2020-12-21 21:20:00,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:20:00,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-21 21:20:00,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-12-21 21:20:00,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-21 21:20:00,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2020-12-21 21:20:00,565 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 14 [2020-12-21 21:20:00,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:00,565 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2020-12-21 21:20:00,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:20:00,566 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2020-12-21 21:20:00,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-21 21:20:00,566 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:00,567 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:00,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:00,781 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:00,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:00,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1270281666, now seen corresponding path program 2 times [2020-12-21 21:20:00,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:00,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924452604] [2020-12-21 21:20:00,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:00,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:00,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 21:20:00,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924452604] [2020-12-21 21:20:00,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:20:00,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 21:20:00,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120373410] [2020-12-21 21:20:00,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 21:20:00,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:00,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 21:20:00,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 21:20:00,885 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand 4 states. [2020-12-21 21:20:00,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:00,962 INFO L93 Difference]: Finished difference Result 95 states and 120 transitions. [2020-12-21 21:20:00,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:20:00,964 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-12-21 21:20:00,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:00,966 INFO L225 Difference]: With dead ends: 95 [2020-12-21 21:20:00,966 INFO L226 Difference]: Without dead ends: 64 [2020-12-21 21:20:00,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 21:20:00,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-21 21:20:00,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 41. [2020-12-21 21:20:00,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-21 21:20:00,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2020-12-21 21:20:00,976 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 16 [2020-12-21 21:20:00,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:00,976 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2020-12-21 21:20:00,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 21:20:00,976 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2020-12-21 21:20:00,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-21 21:20:00,977 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:00,978 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:00,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-21 21:20:00,978 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:00,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:00,979 INFO L82 PathProgramCache]: Analyzing trace with hash 851634768, now seen corresponding path program 1 times [2020-12-21 21:20:00,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:00,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417252849] [2020-12-21 21:20:00,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:01,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:01,080 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-21 21:20:01,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417252849] [2020-12-21 21:20:01,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:20:01,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 21:20:01,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690826069] [2020-12-21 21:20:01,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 21:20:01,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:01,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 21:20:01,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 21:20:01,083 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand 4 states. [2020-12-21 21:20:01,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:01,143 INFO L93 Difference]: Finished difference Result 92 states and 115 transitions. [2020-12-21 21:20:01,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:20:01,144 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-12-21 21:20:01,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:01,145 INFO L225 Difference]: With dead ends: 92 [2020-12-21 21:20:01,145 INFO L226 Difference]: Without dead ends: 61 [2020-12-21 21:20:01,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 21:20:01,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-21 21:20:01,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-12-21 21:20:01,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-21 21:20:01,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2020-12-21 21:20:01,155 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 19 [2020-12-21 21:20:01,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:01,155 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2020-12-21 21:20:01,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 21:20:01,156 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2020-12-21 21:20:01,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-21 21:20:01,156 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:01,157 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:01,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-21 21:20:01,157 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:01,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:01,158 INFO L82 PathProgramCache]: Analyzing trace with hash 629647741, now seen corresponding path program 1 times [2020-12-21 21:20:01,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:01,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144228158] [2020-12-21 21:20:01,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:01,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:01,231 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:20:01,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144228158] [2020-12-21 21:20:01,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45049091] [2020-12-21 21:20:01,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:01,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:01,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:20:01,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:01,387 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:20:01,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:01,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-21 21:20:01,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867170879] [2020-12-21 21:20:01,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 21:20:01,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:01,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 21:20:01,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:20:01,394 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand 6 states. [2020-12-21 21:20:01,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:01,451 INFO L93 Difference]: Finished difference Result 94 states and 118 transitions. [2020-12-21 21:20:01,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 21:20:01,452 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-12-21 21:20:01,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:01,457 INFO L225 Difference]: With dead ends: 94 [2020-12-21 21:20:01,457 INFO L226 Difference]: Without dead ends: 52 [2020-12-21 21:20:01,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:20:01,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-21 21:20:01,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-12-21 21:20:01,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-21 21:20:01,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2020-12-21 21:20:01,474 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 20 [2020-12-21 21:20:01,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:01,475 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2020-12-21 21:20:01,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 21:20:01,475 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2020-12-21 21:20:01,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-21 21:20:01,475 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:01,476 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:01,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:01,677 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:01,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:01,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1857263233, now seen corresponding path program 2 times [2020-12-21 21:20:01,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:01,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095514028] [2020-12-21 21:20:01,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:01,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:01,746 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:20:01,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095514028] [2020-12-21 21:20:01,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177723037] [2020-12-21 21:20:01,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:01,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-21 21:20:01,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:01,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-21 21:20:01,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:01,894 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:20:01,901 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:20:01,916 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-21 21:20:01,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:20:01,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2020-12-21 21:20:01,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961562255] [2020-12-21 21:20:01,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 21:20:01,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:01,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 21:20:01,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:20:01,918 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand 6 states. [2020-12-21 21:20:02,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:02,056 INFO L93 Difference]: Finished difference Result 81 states and 103 transitions. [2020-12-21 21:20:02,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 21:20:02,056 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-12-21 21:20:02,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:02,057 INFO L225 Difference]: With dead ends: 81 [2020-12-21 21:20:02,058 INFO L226 Difference]: Without dead ends: 79 [2020-12-21 21:20:02,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:20:02,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-12-21 21:20:02,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 52. [2020-12-21 21:20:02,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-21 21:20:02,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 64 transitions. [2020-12-21 21:20:02,067 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 64 transitions. Word has length 22 [2020-12-21 21:20:02,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:02,070 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 64 transitions. [2020-12-21 21:20:02,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 21:20:02,071 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 64 transitions. [2020-12-21 21:20:02,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-21 21:20:02,071 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:02,072 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:02,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:02,277 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:02,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:02,279 INFO L82 PathProgramCache]: Analyzing trace with hash -487696587, now seen corresponding path program 1 times [2020-12-21 21:20:02,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:02,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138848129] [2020-12-21 21:20:02,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:02,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:02,351 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-21 21:20:02,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138848129] [2020-12-21 21:20:02,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620220650] [2020-12-21 21:20:02,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:02,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:02,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:20:02,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:02,476 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-21 21:20:02,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:02,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-21 21:20:02,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823377425] [2020-12-21 21:20:02,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:20:02,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:02,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:20:02,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:20:02,485 INFO L87 Difference]: Start difference. First operand 52 states and 64 transitions. Second operand 7 states. [2020-12-21 21:20:02,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:02,512 INFO L93 Difference]: Finished difference Result 98 states and 122 transitions. [2020-12-21 21:20:02,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 21:20:02,512 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-12-21 21:20:02,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:02,515 INFO L225 Difference]: With dead ends: 98 [2020-12-21 21:20:02,522 INFO L226 Difference]: Without dead ends: 55 [2020-12-21 21:20:02,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:20:02,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-21 21:20:02,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-12-21 21:20:02,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-21 21:20:02,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2020-12-21 21:20:02,546 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 26 [2020-12-21 21:20:02,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:02,546 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2020-12-21 21:20:02,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:20:02,546 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2020-12-21 21:20:02,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-21 21:20:02,547 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:02,547 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:02,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:02,748 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:02,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:02,749 INFO L82 PathProgramCache]: Analyzing trace with hash -2115007049, now seen corresponding path program 2 times [2020-12-21 21:20:02,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:02,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755461651] [2020-12-21 21:20:02,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:02,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:02,853 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-21 21:20:02,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755461651] [2020-12-21 21:20:02,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435222397] [2020-12-21 21:20:02,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:02,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:20:02,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:02,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:20:02,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:02,979 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-21 21:20:02,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:02,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-21 21:20:02,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945868918] [2020-12-21 21:20:02,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 21:20:02,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:02,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 21:20:02,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:20:02,981 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand 8 states. [2020-12-21 21:20:03,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:03,008 INFO L93 Difference]: Finished difference Result 100 states and 124 transitions. [2020-12-21 21:20:03,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:20:03,009 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-12-21 21:20:03,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:03,010 INFO L225 Difference]: With dead ends: 100 [2020-12-21 21:20:03,010 INFO L226 Difference]: Without dead ends: 57 [2020-12-21 21:20:03,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:20:03,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-21 21:20:03,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-12-21 21:20:03,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-21 21:20:03,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2020-12-21 21:20:03,017 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 28 [2020-12-21 21:20:03,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:03,017 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2020-12-21 21:20:03,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 21:20:03,017 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2020-12-21 21:20:03,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-21 21:20:03,018 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:03,018 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:03,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:03,233 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:03,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:03,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1702702009, now seen corresponding path program 3 times [2020-12-21 21:20:03,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:03,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609848830] [2020-12-21 21:20:03,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:03,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:03,316 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-21 21:20:03,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609848830] [2020-12-21 21:20:03,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879081919] [2020-12-21 21:20:03,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:03,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-21 21:20:03,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:03,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:20:03,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:03,464 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-21 21:20:03,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:03,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4] total 10 [2020-12-21 21:20:03,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188395923] [2020-12-21 21:20:03,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 21:20:03,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:03,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 21:20:03,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:20:03,477 INFO L87 Difference]: Start difference. First operand 56 states and 68 transitions. Second operand 10 states. [2020-12-21 21:20:03,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:03,663 INFO L93 Difference]: Finished difference Result 132 states and 165 transitions. [2020-12-21 21:20:03,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 21:20:03,663 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-12-21 21:20:03,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:03,665 INFO L225 Difference]: With dead ends: 132 [2020-12-21 21:20:03,665 INFO L226 Difference]: Without dead ends: 89 [2020-12-21 21:20:03,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:20:03,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-21 21:20:03,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 66. [2020-12-21 21:20:03,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-21 21:20:03,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2020-12-21 21:20:03,682 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 30 [2020-12-21 21:20:03,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:03,682 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2020-12-21 21:20:03,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 21:20:03,683 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2020-12-21 21:20:03,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-21 21:20:03,683 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:03,684 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:03,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:03,898 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:03,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:03,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1917971385, now seen corresponding path program 1 times [2020-12-21 21:20:03,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:03,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854373688] [2020-12-21 21:20:03,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:03,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:04,005 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-21 21:20:04,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854373688] [2020-12-21 21:20:04,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762298565] [2020-12-21 21:20:04,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:04,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:04,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 21:20:04,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:04,119 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-21 21:20:04,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:04,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-21 21:20:04,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309965805] [2020-12-21 21:20:04,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 21:20:04,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:04,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 21:20:04,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:20:04,122 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand 10 states. [2020-12-21 21:20:04,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:04,176 INFO L93 Difference]: Finished difference Result 120 states and 152 transitions. [2020-12-21 21:20:04,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 21:20:04,177 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2020-12-21 21:20:04,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:04,178 INFO L225 Difference]: With dead ends: 120 [2020-12-21 21:20:04,178 INFO L226 Difference]: Without dead ends: 69 [2020-12-21 21:20:04,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:20:04,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-21 21:20:04,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-12-21 21:20:04,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-21 21:20:04,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2020-12-21 21:20:04,186 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 84 transitions. Word has length 32 [2020-12-21 21:20:04,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:04,187 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 84 transitions. [2020-12-21 21:20:04,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 21:20:04,187 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 84 transitions. [2020-12-21 21:20:04,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-21 21:20:04,188 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:04,188 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:04,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-21 21:20:04,395 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:04,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:04,396 INFO L82 PathProgramCache]: Analyzing trace with hash 2046605499, now seen corresponding path program 2 times [2020-12-21 21:20:04,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:04,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396604500] [2020-12-21 21:20:04,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:04,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:04,528 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-21 21:20:04,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396604500] [2020-12-21 21:20:04,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409286343] [2020-12-21 21:20:04,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:04,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:20:04,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:04,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 21:20:04,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:04,696 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-21 21:20:04,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:04,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-21 21:20:04,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395082292] [2020-12-21 21:20:04,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 21:20:04,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:04,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 21:20:04,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:20:04,699 INFO L87 Difference]: Start difference. First operand 68 states and 84 transitions. Second operand 11 states. [2020-12-21 21:20:04,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:04,739 INFO L93 Difference]: Finished difference Result 122 states and 154 transitions. [2020-12-21 21:20:04,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 21:20:04,739 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-12-21 21:20:04,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:04,740 INFO L225 Difference]: With dead ends: 122 [2020-12-21 21:20:04,740 INFO L226 Difference]: Without dead ends: 71 [2020-12-21 21:20:04,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:20:04,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-21 21:20:04,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-12-21 21:20:04,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-21 21:20:04,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 86 transitions. [2020-12-21 21:20:04,746 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 86 transitions. Word has length 34 [2020-12-21 21:20:04,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:04,747 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 86 transitions. [2020-12-21 21:20:04,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 21:20:04,747 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 86 transitions. [2020-12-21 21:20:04,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-21 21:20:04,748 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:04,748 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:04,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:04,961 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:04,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:04,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1109937469, now seen corresponding path program 3 times [2020-12-21 21:20:04,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:04,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915310683] [2020-12-21 21:20:04,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:04,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:05,096 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-21 21:20:05,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915310683] [2020-12-21 21:20:05,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473677328] [2020-12-21 21:20:05,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:05,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-21 21:20:05,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:05,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:20:05,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:05,234 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-21 21:20:05,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:05,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 14 [2020-12-21 21:20:05,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169540295] [2020-12-21 21:20:05,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 21:20:05,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:05,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 21:20:05,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:20:05,240 INFO L87 Difference]: Start difference. First operand 70 states and 86 transitions. Second operand 14 states. [2020-12-21 21:20:05,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:05,526 INFO L93 Difference]: Finished difference Result 140 states and 178 transitions. [2020-12-21 21:20:05,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 21:20:05,527 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-12-21 21:20:05,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:05,528 INFO L225 Difference]: With dead ends: 140 [2020-12-21 21:20:05,528 INFO L226 Difference]: Without dead ends: 89 [2020-12-21 21:20:05,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2020-12-21 21:20:05,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-21 21:20:05,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 77. [2020-12-21 21:20:05,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-12-21 21:20:05,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 94 transitions. [2020-12-21 21:20:05,535 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 94 transitions. Word has length 36 [2020-12-21 21:20:05,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:05,535 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 94 transitions. [2020-12-21 21:20:05,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 21:20:05,536 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 94 transitions. [2020-12-21 21:20:05,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-21 21:20:05,537 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:05,537 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:05,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:05,753 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:05,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:05,754 INFO L82 PathProgramCache]: Analyzing trace with hash 102207473, now seen corresponding path program 4 times [2020-12-21 21:20:05,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:05,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638205925] [2020-12-21 21:20:05,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:05,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:05,897 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-21 21:20:05,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638205925] [2020-12-21 21:20:05,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107693879] [2020-12-21 21:20:05,898 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:05,972 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:20:05,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:05,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 21:20:05,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:06,032 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-21 21:20:06,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:06,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-21 21:20:06,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897025670] [2020-12-21 21:20:06,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 21:20:06,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:06,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 21:20:06,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:20:06,035 INFO L87 Difference]: Start difference. First operand 77 states and 94 transitions. Second operand 13 states. [2020-12-21 21:20:06,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:06,083 INFO L93 Difference]: Finished difference Result 136 states and 170 transitions. [2020-12-21 21:20:06,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 21:20:06,084 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2020-12-21 21:20:06,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:06,085 INFO L225 Difference]: With dead ends: 136 [2020-12-21 21:20:06,085 INFO L226 Difference]: Without dead ends: 80 [2020-12-21 21:20:06,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:20:06,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-21 21:20:06,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-12-21 21:20:06,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-21 21:20:06,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 96 transitions. [2020-12-21 21:20:06,091 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 96 transitions. Word has length 41 [2020-12-21 21:20:06,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:06,091 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 96 transitions. [2020-12-21 21:20:06,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 21:20:06,092 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 96 transitions. [2020-12-21 21:20:06,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-21 21:20:06,092 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:06,093 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:06,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-21 21:20:06,306 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:06,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:06,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1244248785, now seen corresponding path program 5 times [2020-12-21 21:20:06,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:06,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023015252] [2020-12-21 21:20:06,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:06,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:06,476 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-21 21:20:06,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023015252] [2020-12-21 21:20:06,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413056146] [2020-12-21 21:20:06,477 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:06,600 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-12-21 21:20:06,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:06,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 21:20:06,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:06,697 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-21 21:20:06,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:06,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-21 21:20:06,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148548982] [2020-12-21 21:20:06,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 21:20:06,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:06,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 21:20:06,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:20:06,704 INFO L87 Difference]: Start difference. First operand 79 states and 96 transitions. Second operand 14 states. [2020-12-21 21:20:06,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:06,760 INFO L93 Difference]: Finished difference Result 138 states and 172 transitions. [2020-12-21 21:20:06,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 21:20:06,760 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 43 [2020-12-21 21:20:06,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:06,761 INFO L225 Difference]: With dead ends: 138 [2020-12-21 21:20:06,761 INFO L226 Difference]: Without dead ends: 82 [2020-12-21 21:20:06,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:20:06,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-21 21:20:06,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-12-21 21:20:06,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-21 21:20:06,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 98 transitions. [2020-12-21 21:20:06,776 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 98 transitions. Word has length 43 [2020-12-21 21:20:06,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:06,777 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 98 transitions. [2020-12-21 21:20:06,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 21:20:06,777 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 98 transitions. [2020-12-21 21:20:06,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-21 21:20:06,777 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:06,778 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:06,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-21 21:20:06,994 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:06,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:06,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1891410669, now seen corresponding path program 6 times [2020-12-21 21:20:06,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:06,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952543468] [2020-12-21 21:20:06,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:07,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:07,146 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-21 21:20:07,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952543468] [2020-12-21 21:20:07,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518361850] [2020-12-21 21:20:07,147 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:07,225 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-21 21:20:07,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:07,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:20:07,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:07,318 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2020-12-21 21:20:07,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:07,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 6] total 18 [2020-12-21 21:20:07,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822761755] [2020-12-21 21:20:07,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-21 21:20:07,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:07,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-21 21:20:07,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:20:07,321 INFO L87 Difference]: Start difference. First operand 81 states and 98 transitions. Second operand 18 states. [2020-12-21 21:20:07,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:07,767 INFO L93 Difference]: Finished difference Result 157 states and 198 transitions. [2020-12-21 21:20:07,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-21 21:20:07,768 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 45 [2020-12-21 21:20:07,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:07,769 INFO L225 Difference]: With dead ends: 157 [2020-12-21 21:20:07,769 INFO L226 Difference]: Without dead ends: 101 [2020-12-21 21:20:07,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=756, Unknown=0, NotChecked=0, Total=1056 [2020-12-21 21:20:07,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-21 21:20:07,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 89. [2020-12-21 21:20:07,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-21 21:20:07,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 108 transitions. [2020-12-21 21:20:07,776 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 108 transitions. Word has length 45 [2020-12-21 21:20:07,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:07,776 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 108 transitions. [2020-12-21 21:20:07,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-21 21:20:07,776 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 108 transitions. [2020-12-21 21:20:07,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-21 21:20:07,777 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:07,777 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:07,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-21 21:20:07,993 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:07,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:07,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1678460795, now seen corresponding path program 7 times [2020-12-21 21:20:07,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:07,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149476492] [2020-12-21 21:20:07,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:08,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:08,163 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-21 21:20:08,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149476492] [2020-12-21 21:20:08,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32961714] [2020-12-21 21:20:08,167 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:08,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:08,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-21 21:20:08,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:08,313 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-21 21:20:08,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:08,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-21 21:20:08,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187148139] [2020-12-21 21:20:08,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-21 21:20:08,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:08,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-21 21:20:08,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-21 21:20:08,316 INFO L87 Difference]: Start difference. First operand 89 states and 108 transitions. Second operand 16 states. [2020-12-21 21:20:08,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:08,373 INFO L93 Difference]: Finished difference Result 154 states and 192 transitions. [2020-12-21 21:20:08,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-21 21:20:08,374 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 50 [2020-12-21 21:20:08,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:08,375 INFO L225 Difference]: With dead ends: 154 [2020-12-21 21:20:08,375 INFO L226 Difference]: Without dead ends: 92 [2020-12-21 21:20:08,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-21 21:20:08,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-21 21:20:08,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-12-21 21:20:08,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-21 21:20:08,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 110 transitions. [2020-12-21 21:20:08,382 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 110 transitions. Word has length 50 [2020-12-21 21:20:08,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:08,382 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 110 transitions. [2020-12-21 21:20:08,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-21 21:20:08,382 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 110 transitions. [2020-12-21 21:20:08,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-21 21:20:08,383 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:08,383 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:08,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:08,597 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:08,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:08,598 INFO L82 PathProgramCache]: Analyzing trace with hash -658831097, now seen corresponding path program 8 times [2020-12-21 21:20:08,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:08,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32526686] [2020-12-21 21:20:08,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:08,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:08,830 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-21 21:20:08,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32526686] [2020-12-21 21:20:08,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753844939] [2020-12-21 21:20:08,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:08,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:20:08,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:08,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-21 21:20:08,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:08,985 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-21 21:20:08,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:08,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-21 21:20:08,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933290352] [2020-12-21 21:20:08,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-21 21:20:08,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:08,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-21 21:20:08,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 21:20:08,987 INFO L87 Difference]: Start difference. First operand 91 states and 110 transitions. Second operand 17 states. [2020-12-21 21:20:09,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:09,057 INFO L93 Difference]: Finished difference Result 156 states and 194 transitions. [2020-12-21 21:20:09,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-21 21:20:09,058 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 52 [2020-12-21 21:20:09,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:09,059 INFO L225 Difference]: With dead ends: 156 [2020-12-21 21:20:09,059 INFO L226 Difference]: Without dead ends: 94 [2020-12-21 21:20:09,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 21:20:09,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-21 21:20:09,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-12-21 21:20:09,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-21 21:20:09,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 112 transitions. [2020-12-21 21:20:09,065 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 112 transitions. Word has length 52 [2020-12-21 21:20:09,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:09,065 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 112 transitions. [2020-12-21 21:20:09,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-21 21:20:09,066 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 112 transitions. [2020-12-21 21:20:09,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-21 21:20:09,066 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:09,066 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:09,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:09,281 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:09,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:09,281 INFO L82 PathProgramCache]: Analyzing trace with hash -47234807, now seen corresponding path program 9 times [2020-12-21 21:20:09,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:09,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375605010] [2020-12-21 21:20:09,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:09,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:09,475 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-21 21:20:09,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375605010] [2020-12-21 21:20:09,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509604177] [2020-12-21 21:20:09,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:09,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-21 21:20:09,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:09,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:20:09,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:09,681 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2020-12-21 21:20:09,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:09,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 7] total 22 [2020-12-21 21:20:09,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960768816] [2020-12-21 21:20:09,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-21 21:20:09,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:09,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-21 21:20:09,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-12-21 21:20:09,683 INFO L87 Difference]: Start difference. First operand 93 states and 112 transitions. Second operand 22 states. [2020-12-21 21:20:10,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:10,204 INFO L93 Difference]: Finished difference Result 175 states and 220 transitions. [2020-12-21 21:20:10,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-21 21:20:10,205 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 54 [2020-12-21 21:20:10,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:10,206 INFO L225 Difference]: With dead ends: 175 [2020-12-21 21:20:10,206 INFO L226 Difference]: Without dead ends: 113 [2020-12-21 21:20:10,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=450, Invalid=1190, Unknown=0, NotChecked=0, Total=1640 [2020-12-21 21:20:10,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-12-21 21:20:10,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 101. [2020-12-21 21:20:10,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-12-21 21:20:10,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 122 transitions. [2020-12-21 21:20:10,214 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 122 transitions. Word has length 54 [2020-12-21 21:20:10,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:10,214 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 122 transitions. [2020-12-21 21:20:10,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-21 21:20:10,214 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 122 transitions. [2020-12-21 21:20:10,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-21 21:20:10,215 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:10,215 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:10,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:10,430 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:10,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:10,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1523186395, now seen corresponding path program 10 times [2020-12-21 21:20:10,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:10,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530659665] [2020-12-21 21:20:10,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:10,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:10,681 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-21 21:20:10,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530659665] [2020-12-21 21:20:10,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366652904] [2020-12-21 21:20:10,681 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:10,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:20:10,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:10,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-21 21:20:10,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:10,888 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-21 21:20:10,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:10,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-21 21:20:10,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884764449] [2020-12-21 21:20:10,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-21 21:20:10,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:10,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-21 21:20:10,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-21 21:20:10,893 INFO L87 Difference]: Start difference. First operand 101 states and 122 transitions. Second operand 19 states. [2020-12-21 21:20:10,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:10,963 INFO L93 Difference]: Finished difference Result 172 states and 214 transitions. [2020-12-21 21:20:10,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-21 21:20:10,964 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 59 [2020-12-21 21:20:10,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:10,965 INFO L225 Difference]: With dead ends: 172 [2020-12-21 21:20:10,965 INFO L226 Difference]: Without dead ends: 104 [2020-12-21 21:20:10,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-21 21:20:10,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-21 21:20:10,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-12-21 21:20:10,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-12-21 21:20:10,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 124 transitions. [2020-12-21 21:20:10,972 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 124 transitions. Word has length 59 [2020-12-21 21:20:10,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:10,973 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 124 transitions. [2020-12-21 21:20:10,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-21 21:20:10,973 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 124 transitions. [2020-12-21 21:20:10,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-21 21:20:10,973 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:10,974 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:11,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-21 21:20:11,187 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:11,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:11,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1742022371, now seen corresponding path program 11 times [2020-12-21 21:20:11,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:11,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096428308] [2020-12-21 21:20:11,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:11,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:11,429 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-21 21:20:11,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096428308] [2020-12-21 21:20:11,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681741120] [2020-12-21 21:20:11,430 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:11,684 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-12-21 21:20:11,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:11,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-21 21:20:11,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:11,775 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-21 21:20:11,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:11,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-21 21:20:11,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303088487] [2020-12-21 21:20:11,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-21 21:20:11,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:11,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-21 21:20:11,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-21 21:20:11,778 INFO L87 Difference]: Start difference. First operand 103 states and 124 transitions. Second operand 20 states. [2020-12-21 21:20:11,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:11,852 INFO L93 Difference]: Finished difference Result 174 states and 216 transitions. [2020-12-21 21:20:11,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-21 21:20:11,853 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 61 [2020-12-21 21:20:11,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:11,854 INFO L225 Difference]: With dead ends: 174 [2020-12-21 21:20:11,854 INFO L226 Difference]: Without dead ends: 106 [2020-12-21 21:20:11,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-21 21:20:11,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-21 21:20:11,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-12-21 21:20:11,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-12-21 21:20:11,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 126 transitions. [2020-12-21 21:20:11,863 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 126 transitions. Word has length 61 [2020-12-21 21:20:11,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:11,863 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 126 transitions. [2020-12-21 21:20:11,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-21 21:20:11,863 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 126 transitions. [2020-12-21 21:20:11,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-21 21:20:11,864 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:11,864 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:12,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-21 21:20:12,078 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:12,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:12,078 INFO L82 PathProgramCache]: Analyzing trace with hash -13446879, now seen corresponding path program 12 times [2020-12-21 21:20:12,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:12,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418062847] [2020-12-21 21:20:12,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:12,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:12,332 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-21 21:20:12,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418062847] [2020-12-21 21:20:12,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187002443] [2020-12-21 21:20:12,333 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:12,468 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-21 21:20:12,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:12,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 21:20:12,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:12,633 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2020-12-21 21:20:12,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:12,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 8] total 26 [2020-12-21 21:20:12,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585381393] [2020-12-21 21:20:12,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-21 21:20:12,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:12,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-21 21:20:12,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=438, Unknown=0, NotChecked=0, Total=650 [2020-12-21 21:20:12,635 INFO L87 Difference]: Start difference. First operand 105 states and 126 transitions. Second operand 26 states. [2020-12-21 21:20:13,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:13,312 INFO L93 Difference]: Finished difference Result 193 states and 242 transitions. [2020-12-21 21:20:13,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-21 21:20:13,313 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 63 [2020-12-21 21:20:13,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:13,314 INFO L225 Difference]: With dead ends: 193 [2020-12-21 21:20:13,314 INFO L226 Difference]: Without dead ends: 125 [2020-12-21 21:20:13,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=630, Invalid=1722, Unknown=0, NotChecked=0, Total=2352 [2020-12-21 21:20:13,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-12-21 21:20:13,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 113. [2020-12-21 21:20:13,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-12-21 21:20:13,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 136 transitions. [2020-12-21 21:20:13,321 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 136 transitions. Word has length 63 [2020-12-21 21:20:13,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:13,321 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 136 transitions. [2020-12-21 21:20:13,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-21 21:20:13,321 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 136 transitions. [2020-12-21 21:20:13,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-21 21:20:13,322 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:13,322 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:13,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-21 21:20:13,537 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:13,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:13,537 INFO L82 PathProgramCache]: Analyzing trace with hash -412880559, now seen corresponding path program 13 times [2020-12-21 21:20:13,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:13,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195824302] [2020-12-21 21:20:13,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:13,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:13,845 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-21 21:20:13,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195824302] [2020-12-21 21:20:13,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800297130] [2020-12-21 21:20:13,846 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:13,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:13,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-21 21:20:13,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:14,041 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-21 21:20:14,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:14,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-21 21:20:14,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909635925] [2020-12-21 21:20:14,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-21 21:20:14,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:14,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-21 21:20:14,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-21 21:20:14,043 INFO L87 Difference]: Start difference. First operand 113 states and 136 transitions. Second operand 22 states. [2020-12-21 21:20:14,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:14,111 INFO L93 Difference]: Finished difference Result 190 states and 236 transitions. [2020-12-21 21:20:14,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-21 21:20:14,112 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 68 [2020-12-21 21:20:14,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:14,113 INFO L225 Difference]: With dead ends: 190 [2020-12-21 21:20:14,113 INFO L226 Difference]: Without dead ends: 116 [2020-12-21 21:20:14,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-21 21:20:14,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-12-21 21:20:14,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2020-12-21 21:20:14,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-12-21 21:20:14,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 138 transitions. [2020-12-21 21:20:14,120 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 138 transitions. Word has length 68 [2020-12-21 21:20:14,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:14,121 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 138 transitions. [2020-12-21 21:20:14,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-21 21:20:14,121 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 138 transitions. [2020-12-21 21:20:14,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-21 21:20:14,122 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:14,122 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:14,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-21 21:20:14,331 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:14,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:14,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1841030483, now seen corresponding path program 14 times [2020-12-21 21:20:14,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:14,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317317326] [2020-12-21 21:20:14,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:14,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:14,665 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-21 21:20:14,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317317326] [2020-12-21 21:20:14,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556557974] [2020-12-21 21:20:14,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:14,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:20:14,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:14,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-21 21:20:14,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:14,865 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-21 21:20:14,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:14,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-21 21:20:14,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778920506] [2020-12-21 21:20:14,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-21 21:20:14,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:14,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-21 21:20:14,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-21 21:20:14,868 INFO L87 Difference]: Start difference. First operand 115 states and 138 transitions. Second operand 23 states. [2020-12-21 21:20:14,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:14,943 INFO L93 Difference]: Finished difference Result 192 states and 238 transitions. [2020-12-21 21:20:14,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-21 21:20:14,944 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 70 [2020-12-21 21:20:14,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:14,945 INFO L225 Difference]: With dead ends: 192 [2020-12-21 21:20:14,945 INFO L226 Difference]: Without dead ends: 118 [2020-12-21 21:20:14,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-21 21:20:14,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-12-21 21:20:14,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2020-12-21 21:20:14,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-12-21 21:20:14,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 140 transitions. [2020-12-21 21:20:14,952 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 140 transitions. Word has length 70 [2020-12-21 21:20:14,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:14,952 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 140 transitions. [2020-12-21 21:20:14,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-21 21:20:14,952 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 140 transitions. [2020-12-21 21:20:14,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-21 21:20:14,953 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:14,953 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:15,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-21 21:20:15,167 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:15,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:15,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1108942635, now seen corresponding path program 15 times [2020-12-21 21:20:15,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:15,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114326188] [2020-12-21 21:20:15,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:15,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:15,528 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-21 21:20:15,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114326188] [2020-12-21 21:20:15,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530183574] [2020-12-21 21:20:15,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:15,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-21 21:20:15,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:15,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 21:20:15,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:15,886 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 39 proven. 35 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2020-12-21 21:20:15,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:15,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 11] total 32 [2020-12-21 21:20:15,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969942176] [2020-12-21 21:20:15,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-21 21:20:15,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:15,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-21 21:20:15,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=663, Unknown=0, NotChecked=0, Total=992 [2020-12-21 21:20:15,888 INFO L87 Difference]: Start difference. First operand 117 states and 140 transitions. Second operand 32 states. [2020-12-21 21:20:16,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:16,961 INFO L93 Difference]: Finished difference Result 212 states and 266 transitions. [2020-12-21 21:20:16,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-21 21:20:16,967 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 72 [2020-12-21 21:20:16,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:16,968 INFO L225 Difference]: With dead ends: 212 [2020-12-21 21:20:16,968 INFO L226 Difference]: Without dead ends: 138 [2020-12-21 21:20:16,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=993, Invalid=2667, Unknown=0, NotChecked=0, Total=3660 [2020-12-21 21:20:16,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-12-21 21:20:16,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 127. [2020-12-21 21:20:16,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-12-21 21:20:16,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 152 transitions. [2020-12-21 21:20:16,977 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 152 transitions. Word has length 72 [2020-12-21 21:20:16,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:16,977 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 152 transitions. [2020-12-21 21:20:16,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-21 21:20:16,977 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 152 transitions. [2020-12-21 21:20:16,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-21 21:20:16,978 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:16,978 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:17,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:17,193 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:17,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:17,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1126669463, now seen corresponding path program 16 times [2020-12-21 21:20:17,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:17,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803917459] [2020-12-21 21:20:17,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:17,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:17,584 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-12-21 21:20:17,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803917459] [2020-12-21 21:20:17,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419520838] [2020-12-21 21:20:17,585 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:17,680 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:20:17,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:17,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-21 21:20:17,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:17,807 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-12-21 21:20:17,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:17,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-21 21:20:17,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307903554] [2020-12-21 21:20:17,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-21 21:20:17,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:17,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-21 21:20:17,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-21 21:20:17,809 INFO L87 Difference]: Start difference. First operand 127 states and 152 transitions. Second operand 26 states. [2020-12-21 21:20:17,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:17,897 INFO L93 Difference]: Finished difference Result 210 states and 260 transitions. [2020-12-21 21:20:17,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-21 21:20:17,897 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 79 [2020-12-21 21:20:17,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:17,898 INFO L225 Difference]: With dead ends: 210 [2020-12-21 21:20:17,898 INFO L226 Difference]: Without dead ends: 130 [2020-12-21 21:20:17,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-21 21:20:17,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-12-21 21:20:17,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2020-12-21 21:20:17,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-12-21 21:20:17,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 154 transitions. [2020-12-21 21:20:17,906 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 154 transitions. Word has length 79 [2020-12-21 21:20:17,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:17,907 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 154 transitions. [2020-12-21 21:20:17,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-21 21:20:17,907 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 154 transitions. [2020-12-21 21:20:17,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-21 21:20:17,908 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:17,908 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:18,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-21 21:20:18,121 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:18,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:18,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1854770347, now seen corresponding path program 17 times [2020-12-21 21:20:18,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:18,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032542985] [2020-12-21 21:20:18,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:18,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:18,570 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-12-21 21:20:18,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032542985] [2020-12-21 21:20:18,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654655652] [2020-12-21 21:20:18,571 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:19,529 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-12-21 21:20:19,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:19,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-21 21:20:19,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:19,651 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-12-21 21:20:19,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:19,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-21 21:20:19,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119377701] [2020-12-21 21:20:19,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-21 21:20:19,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:19,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-21 21:20:19,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-21 21:20:19,653 INFO L87 Difference]: Start difference. First operand 129 states and 154 transitions. Second operand 27 states. [2020-12-21 21:20:19,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:19,751 INFO L93 Difference]: Finished difference Result 212 states and 262 transitions. [2020-12-21 21:20:19,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-21 21:20:19,752 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 81 [2020-12-21 21:20:19,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:19,753 INFO L225 Difference]: With dead ends: 212 [2020-12-21 21:20:19,753 INFO L226 Difference]: Without dead ends: 132 [2020-12-21 21:20:19,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-21 21:20:19,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-12-21 21:20:19,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2020-12-21 21:20:19,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-12-21 21:20:19,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 156 transitions. [2020-12-21 21:20:19,760 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 156 transitions. Word has length 81 [2020-12-21 21:20:19,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:19,760 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 156 transitions. [2020-12-21 21:20:19,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-21 21:20:19,760 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 156 transitions. [2020-12-21 21:20:19,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-21 21:20:19,761 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:19,761 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:19,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:19,976 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:19,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:19,976 INFO L82 PathProgramCache]: Analyzing trace with hash 2019725971, now seen corresponding path program 18 times [2020-12-21 21:20:19,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:19,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919205193] [2020-12-21 21:20:19,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:19,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:20,476 INFO L134 CoverageAnalysis]: Checked inductivity of 629 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-12-21 21:20:20,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919205193] [2020-12-21 21:20:20,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993654010] [2020-12-21 21:20:20,476 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:20,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-21 21:20:20,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:20,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 21:20:20,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:20,983 INFO L134 CoverageAnalysis]: Checked inductivity of 629 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2020-12-21 21:20:20,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:20,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 10] total 35 [2020-12-21 21:20:20,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832142205] [2020-12-21 21:20:20,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-21 21:20:20,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:20,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-21 21:20:20,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=802, Unknown=0, NotChecked=0, Total=1190 [2020-12-21 21:20:20,985 INFO L87 Difference]: Start difference. First operand 131 states and 156 transitions. Second operand 35 states. [2020-12-21 21:20:22,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:22,196 INFO L93 Difference]: Finished difference Result 231 states and 288 transitions. [2020-12-21 21:20:22,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-21 21:20:22,197 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 83 [2020-12-21 21:20:22,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:22,198 INFO L225 Difference]: With dead ends: 231 [2020-12-21 21:20:22,198 INFO L226 Difference]: Without dead ends: 151 [2020-12-21 21:20:22,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1158, Invalid=3264, Unknown=0, NotChecked=0, Total=4422 [2020-12-21 21:20:22,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-12-21 21:20:22,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 139. [2020-12-21 21:20:22,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-12-21 21:20:22,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 166 transitions. [2020-12-21 21:20:22,208 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 166 transitions. Word has length 83 [2020-12-21 21:20:22,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:22,209 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 166 transitions. [2020-12-21 21:20:22,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-21 21:20:22,209 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 166 transitions. [2020-12-21 21:20:22,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-21 21:20:22,210 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:22,210 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:22,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-21 21:20:22,425 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:22,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:22,425 INFO L82 PathProgramCache]: Analyzing trace with hash -965538401, now seen corresponding path program 19 times [2020-12-21 21:20:22,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:22,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095090018] [2020-12-21 21:20:22,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:22,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:23,016 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-12-21 21:20:23,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095090018] [2020-12-21 21:20:23,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290374070] [2020-12-21 21:20:23,016 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:23,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:23,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-21 21:20:23,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:23,230 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-12-21 21:20:23,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:23,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-21 21:20:23,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286194417] [2020-12-21 21:20:23,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-21 21:20:23,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:23,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-21 21:20:23,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-21 21:20:23,232 INFO L87 Difference]: Start difference. First operand 139 states and 166 transitions. Second operand 29 states. [2020-12-21 21:20:23,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:23,351 INFO L93 Difference]: Finished difference Result 228 states and 282 transitions. [2020-12-21 21:20:23,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-21 21:20:23,352 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 88 [2020-12-21 21:20:23,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:23,353 INFO L225 Difference]: With dead ends: 228 [2020-12-21 21:20:23,353 INFO L226 Difference]: Without dead ends: 142 [2020-12-21 21:20:23,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-21 21:20:23,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-12-21 21:20:23,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2020-12-21 21:20:23,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-12-21 21:20:23,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 168 transitions. [2020-12-21 21:20:23,361 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 168 transitions. Word has length 88 [2020-12-21 21:20:23,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:23,361 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 168 transitions. [2020-12-21 21:20:23,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-21 21:20:23,362 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 168 transitions. [2020-12-21 21:20:23,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-21 21:20:23,363 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:23,363 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:23,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:23,577 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:23,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:23,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1636111199, now seen corresponding path program 20 times [2020-12-21 21:20:23,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:23,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959658310] [2020-12-21 21:20:23,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:23,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:24,091 INFO L134 CoverageAnalysis]: Checked inductivity of 748 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-12-21 21:20:24,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959658310] [2020-12-21 21:20:24,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277701178] [2020-12-21 21:20:24,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:24,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:20:24,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:24,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-21 21:20:24,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:24,336 INFO L134 CoverageAnalysis]: Checked inductivity of 748 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-12-21 21:20:24,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:24,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-21 21:20:24,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140795232] [2020-12-21 21:20:24,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-21 21:20:24,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:24,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-21 21:20:24,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-21 21:20:24,339 INFO L87 Difference]: Start difference. First operand 141 states and 168 transitions. Second operand 30 states. [2020-12-21 21:20:24,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:24,459 INFO L93 Difference]: Finished difference Result 230 states and 284 transitions. [2020-12-21 21:20:24,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-21 21:20:24,460 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 90 [2020-12-21 21:20:24,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:24,461 INFO L225 Difference]: With dead ends: 230 [2020-12-21 21:20:24,461 INFO L226 Difference]: Without dead ends: 144 [2020-12-21 21:20:24,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-21 21:20:24,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-12-21 21:20:24,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2020-12-21 21:20:24,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-12-21 21:20:24,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 170 transitions. [2020-12-21 21:20:24,468 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 170 transitions. Word has length 90 [2020-12-21 21:20:24,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:24,468 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 170 transitions. [2020-12-21 21:20:24,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-21 21:20:24,469 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 170 transitions. [2020-12-21 21:20:24,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-12-21 21:20:24,469 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:24,470 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:24,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-21 21:20:24,683 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:24,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:24,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1811475677, now seen corresponding path program 21 times [2020-12-21 21:20:24,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:24,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866240100] [2020-12-21 21:20:24,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:24,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:25,226 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-12-21 21:20:25,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866240100] [2020-12-21 21:20:25,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636480254] [2020-12-21 21:20:25,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:25,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-21 21:20:25,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:25,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 21:20:25,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:25,688 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 731 trivial. 0 not checked. [2020-12-21 21:20:25,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:25,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 11] total 39 [2020-12-21 21:20:25,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617652008] [2020-12-21 21:20:25,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-21 21:20:25,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:25,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-21 21:20:25,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=481, Invalid=1001, Unknown=0, NotChecked=0, Total=1482 [2020-12-21 21:20:25,691 INFO L87 Difference]: Start difference. First operand 143 states and 170 transitions. Second operand 39 states. [2020-12-21 21:20:27,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:27,047 INFO L93 Difference]: Finished difference Result 249 states and 310 transitions. [2020-12-21 21:20:27,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-21 21:20:27,047 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 92 [2020-12-21 21:20:27,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:27,049 INFO L225 Difference]: With dead ends: 249 [2020-12-21 21:20:27,049 INFO L226 Difference]: Without dead ends: 163 [2020-12-21 21:20:27,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1437, Invalid=4113, Unknown=0, NotChecked=0, Total=5550 [2020-12-21 21:20:27,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-12-21 21:20:27,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 151. [2020-12-21 21:20:27,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-12-21 21:20:27,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 180 transitions. [2020-12-21 21:20:27,059 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 180 transitions. Word has length 92 [2020-12-21 21:20:27,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:27,059 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 180 transitions. [2020-12-21 21:20:27,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-21 21:20:27,059 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 180 transitions. [2020-12-21 21:20:27,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-21 21:20:27,060 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:27,060 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:27,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:27,275 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:27,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:27,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1415977397, now seen corresponding path program 22 times [2020-12-21 21:20:27,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:27,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138832047] [2020-12-21 21:20:27,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:27,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:27,888 INFO L134 CoverageAnalysis]: Checked inductivity of 878 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2020-12-21 21:20:27,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138832047] [2020-12-21 21:20:27,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107816954] [2020-12-21 21:20:27,888 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:27,998 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:20:27,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:28,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-21 21:20:28,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:28,124 INFO L134 CoverageAnalysis]: Checked inductivity of 878 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2020-12-21 21:20:28,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:28,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-12-21 21:20:28,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597760205] [2020-12-21 21:20:28,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-21 21:20:28,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:28,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-21 21:20:28,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-21 21:20:28,126 INFO L87 Difference]: Start difference. First operand 151 states and 180 transitions. Second operand 32 states. [2020-12-21 21:20:28,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:28,252 INFO L93 Difference]: Finished difference Result 246 states and 304 transitions. [2020-12-21 21:20:28,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-21 21:20:28,252 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 97 [2020-12-21 21:20:28,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:28,253 INFO L225 Difference]: With dead ends: 246 [2020-12-21 21:20:28,253 INFO L226 Difference]: Without dead ends: 154 [2020-12-21 21:20:28,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-21 21:20:28,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-12-21 21:20:28,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2020-12-21 21:20:28,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-12-21 21:20:28,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 182 transitions. [2020-12-21 21:20:28,261 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 182 transitions. Word has length 97 [2020-12-21 21:20:28,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:28,262 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 182 transitions. [2020-12-21 21:20:28,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-21 21:20:28,262 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 182 transitions. [2020-12-21 21:20:28,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-21 21:20:28,263 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:28,263 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:28,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-21 21:20:28,479 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:28,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:28,479 INFO L82 PathProgramCache]: Analyzing trace with hash -846214775, now seen corresponding path program 23 times [2020-12-21 21:20:28,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:28,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70617510] [2020-12-21 21:20:28,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:28,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:29,118 INFO L134 CoverageAnalysis]: Checked inductivity of 935 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2020-12-21 21:20:29,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70617510] [2020-12-21 21:20:29,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136596562] [2020-12-21 21:20:29,119 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:34,316 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2020-12-21 21:20:34,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:34,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-21 21:20:34,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:34,458 INFO L134 CoverageAnalysis]: Checked inductivity of 935 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2020-12-21 21:20:34,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:34,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-12-21 21:20:34,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493618752] [2020-12-21 21:20:34,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-21 21:20:34,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:34,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-21 21:20:34,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-21 21:20:34,461 INFO L87 Difference]: Start difference. First operand 153 states and 182 transitions. Second operand 33 states. [2020-12-21 21:20:34,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:34,580 INFO L93 Difference]: Finished difference Result 248 states and 306 transitions. [2020-12-21 21:20:34,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-21 21:20:34,580 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 99 [2020-12-21 21:20:34,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:34,581 INFO L225 Difference]: With dead ends: 248 [2020-12-21 21:20:34,581 INFO L226 Difference]: Without dead ends: 156 [2020-12-21 21:20:34,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-21 21:20:34,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-12-21 21:20:34,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2020-12-21 21:20:34,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-12-21 21:20:34,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 184 transitions. [2020-12-21 21:20:34,589 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 184 transitions. Word has length 99 [2020-12-21 21:20:34,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:34,590 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 184 transitions. [2020-12-21 21:20:34,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-21 21:20:34,590 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 184 transitions. [2020-12-21 21:20:34,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-21 21:20:34,591 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:34,591 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:34,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:34,805 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:34,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:34,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1234818375, now seen corresponding path program 24 times [2020-12-21 21:20:34,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:34,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696230998] [2020-12-21 21:20:34,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:34,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:35,513 INFO L134 CoverageAnalysis]: Checked inductivity of 994 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2020-12-21 21:20:35,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696230998] [2020-12-21 21:20:35,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517080093] [2020-12-21 21:20:35,514 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:35,958 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2020-12-21 21:20:35,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:35,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-21 21:20:35,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:36,373 INFO L134 CoverageAnalysis]: Checked inductivity of 994 backedges. 59 proven. 92 refuted. 0 times theorem prover too weak. 843 trivial. 0 not checked. [2020-12-21 21:20:36,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:36,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 14] total 45 [2020-12-21 21:20:36,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756510170] [2020-12-21 21:20:36,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-21 21:20:36,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:36,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-21 21:20:36,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=651, Invalid=1329, Unknown=0, NotChecked=0, Total=1980 [2020-12-21 21:20:36,377 INFO L87 Difference]: Start difference. First operand 155 states and 184 transitions. Second operand 45 states. [2020-12-21 21:20:38,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:38,188 INFO L93 Difference]: Finished difference Result 268 states and 334 transitions. [2020-12-21 21:20:38,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-21 21:20:38,189 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 101 [2020-12-21 21:20:38,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:38,191 INFO L225 Difference]: With dead ends: 268 [2020-12-21 21:20:38,191 INFO L226 Difference]: Without dead ends: 176 [2020-12-21 21:20:38,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1172 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1965, Invalid=5517, Unknown=0, NotChecked=0, Total=7482 [2020-12-21 21:20:38,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-12-21 21:20:38,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 165. [2020-12-21 21:20:38,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-12-21 21:20:38,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 196 transitions. [2020-12-21 21:20:38,204 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 196 transitions. Word has length 101 [2020-12-21 21:20:38,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:38,204 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 196 transitions. [2020-12-21 21:20:38,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-21 21:20:38,205 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 196 transitions. [2020-12-21 21:20:38,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-21 21:20:38,206 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:38,206 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:38,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-21 21:20:38,419 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:38,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:38,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1133978733, now seen corresponding path program 25 times [2020-12-21 21:20:38,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:38,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250134144] [2020-12-21 21:20:38,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:38,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:39,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2020-12-21 21:20:39,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250134144] [2020-12-21 21:20:39,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294999842] [2020-12-21 21:20:39,200 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:39,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:39,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-21 21:20:39,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:39,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2020-12-21 21:20:39,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:39,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-12-21 21:20:39,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498114381] [2020-12-21 21:20:39,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-21 21:20:39,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:39,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-21 21:20:39,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-21 21:20:39,446 INFO L87 Difference]: Start difference. First operand 165 states and 196 transitions. Second operand 36 states. [2020-12-21 21:20:39,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:39,589 INFO L93 Difference]: Finished difference Result 266 states and 328 transitions. [2020-12-21 21:20:39,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-21 21:20:39,590 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 108 [2020-12-21 21:20:39,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:39,591 INFO L225 Difference]: With dead ends: 266 [2020-12-21 21:20:39,592 INFO L226 Difference]: Without dead ends: 168 [2020-12-21 21:20:39,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-21 21:20:39,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-12-21 21:20:39,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 167. [2020-12-21 21:20:39,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-12-21 21:20:39,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 198 transitions. [2020-12-21 21:20:39,600 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 198 transitions. Word has length 108 [2020-12-21 21:20:39,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:39,601 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 198 transitions. [2020-12-21 21:20:39,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-21 21:20:39,601 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 198 transitions. [2020-12-21 21:20:39,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-21 21:20:39,601 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:39,602 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:39,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-21 21:20:39,816 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:39,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:39,816 INFO L82 PathProgramCache]: Analyzing trace with hash 690712175, now seen corresponding path program 26 times [2020-12-21 21:20:39,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:39,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291145800] [2020-12-21 21:20:39,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:39,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:40,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1208 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2020-12-21 21:20:40,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291145800] [2020-12-21 21:20:40,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977406104] [2020-12-21 21:20:40,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:40,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:20:40,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:40,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-21 21:20:40,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:40,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1208 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2020-12-21 21:20:40,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:40,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-12-21 21:20:40,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301407397] [2020-12-21 21:20:40,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-21 21:20:40,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:40,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-21 21:20:40,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-21 21:20:40,938 INFO L87 Difference]: Start difference. First operand 167 states and 198 transitions. Second operand 37 states. [2020-12-21 21:20:41,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:41,085 INFO L93 Difference]: Finished difference Result 268 states and 330 transitions. [2020-12-21 21:20:41,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-21 21:20:41,086 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 110 [2020-12-21 21:20:41,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:41,087 INFO L225 Difference]: With dead ends: 268 [2020-12-21 21:20:41,088 INFO L226 Difference]: Without dead ends: 170 [2020-12-21 21:20:41,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-21 21:20:41,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-12-21 21:20:41,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2020-12-21 21:20:41,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-12-21 21:20:41,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 200 transitions. [2020-12-21 21:20:41,096 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 200 transitions. Word has length 110 [2020-12-21 21:20:41,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:41,096 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 200 transitions. [2020-12-21 21:20:41,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-21 21:20:41,096 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 200 transitions. [2020-12-21 21:20:41,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-21 21:20:41,097 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:41,097 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:41,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-21 21:20:41,313 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:41,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:41,313 INFO L82 PathProgramCache]: Analyzing trace with hash -86687759, now seen corresponding path program 27 times [2020-12-21 21:20:41,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:41,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208297718] [2020-12-21 21:20:41,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:41,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:42,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2020-12-21 21:20:42,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208297718] [2020-12-21 21:20:42,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649592750] [2020-12-21 21:20:42,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:42,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-21 21:20:42,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:42,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 21:20:42,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:42,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 1158 trivial. 0 not checked. [2020-12-21 21:20:42,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:42,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 13] total 48 [2020-12-21 21:20:42,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437824563] [2020-12-21 21:20:42,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-21 21:20:42,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:42,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-21 21:20:42,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=733, Invalid=1523, Unknown=0, NotChecked=0, Total=2256 [2020-12-21 21:20:42,813 INFO L87 Difference]: Start difference. First operand 169 states and 200 transitions. Second operand 48 states. [2020-12-21 21:20:44,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:44,964 INFO L93 Difference]: Finished difference Result 287 states and 356 transitions. [2020-12-21 21:20:44,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-21 21:20:44,964 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 112 [2020-12-21 21:20:44,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:44,965 INFO L225 Difference]: With dead ends: 287 [2020-12-21 21:20:44,965 INFO L226 Difference]: Without dead ends: 189 [2020-12-21 21:20:44,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1364 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2193, Invalid=6363, Unknown=0, NotChecked=0, Total=8556 [2020-12-21 21:20:44,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-12-21 21:20:44,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 177. [2020-12-21 21:20:44,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-12-21 21:20:44,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 210 transitions. [2020-12-21 21:20:44,977 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 210 transitions. Word has length 112 [2020-12-21 21:20:44,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:44,978 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 210 transitions. [2020-12-21 21:20:44,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-21 21:20:44,978 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 210 transitions. [2020-12-21 21:20:44,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-12-21 21:20:44,978 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:44,979 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:45,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-21 21:20:45,193 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:45,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:45,193 INFO L82 PathProgramCache]: Analyzing trace with hash 958337981, now seen corresponding path program 28 times [2020-12-21 21:20:45,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:45,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87431285] [2020-12-21 21:20:45,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:45,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:46,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1372 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-12-21 21:20:46,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87431285] [2020-12-21 21:20:46,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019039890] [2020-12-21 21:20:46,135 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:46,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:20:46,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:46,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-21 21:20:46,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:46,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1372 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-12-21 21:20:46,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:46,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-12-21 21:20:46,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964450635] [2020-12-21 21:20:46,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-21 21:20:46,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:46,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-21 21:20:46,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-21 21:20:46,387 INFO L87 Difference]: Start difference. First operand 177 states and 210 transitions. Second operand 39 states. [2020-12-21 21:20:46,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:46,513 INFO L93 Difference]: Finished difference Result 284 states and 350 transitions. [2020-12-21 21:20:46,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-21 21:20:46,516 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 117 [2020-12-21 21:20:46,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:46,517 INFO L225 Difference]: With dead ends: 284 [2020-12-21 21:20:46,518 INFO L226 Difference]: Without dead ends: 180 [2020-12-21 21:20:46,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-21 21:20:46,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-12-21 21:20:46,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 179. [2020-12-21 21:20:46,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-12-21 21:20:46,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 212 transitions. [2020-12-21 21:20:46,526 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 212 transitions. Word has length 117 [2020-12-21 21:20:46,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:46,527 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 212 transitions. [2020-12-21 21:20:46,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-21 21:20:46,527 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 212 transitions. [2020-12-21 21:20:46,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-12-21 21:20:46,527 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:46,528 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:46,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-21 21:20:46,742 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:46,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:46,742 INFO L82 PathProgramCache]: Analyzing trace with hash 2102455291, now seen corresponding path program 29 times [2020-12-21 21:20:46,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:46,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409927557] [2020-12-21 21:20:46,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:46,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:47,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1443 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-12-21 21:20:47,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409927557] [2020-12-21 21:20:47,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248993398] [2020-12-21 21:20:47,716 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:50,746 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2020-12-21 21:20:50,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:50,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-21 21:20:50,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:50,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1443 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-12-21 21:20:50,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:50,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-21 21:20:50,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522482659] [2020-12-21 21:20:50,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-21 21:20:50,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:50,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-21 21:20:50,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-21 21:20:50,907 INFO L87 Difference]: Start difference. First operand 179 states and 212 transitions. Second operand 40 states. [2020-12-21 21:20:51,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:51,050 INFO L93 Difference]: Finished difference Result 286 states and 352 transitions. [2020-12-21 21:20:51,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-21 21:20:51,051 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 119 [2020-12-21 21:20:51,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:51,052 INFO L225 Difference]: With dead ends: 286 [2020-12-21 21:20:51,052 INFO L226 Difference]: Without dead ends: 182 [2020-12-21 21:20:51,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-21 21:20:51,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-12-21 21:20:51,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2020-12-21 21:20:51,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-12-21 21:20:51,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 214 transitions. [2020-12-21 21:20:51,060 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 214 transitions. Word has length 119 [2020-12-21 21:20:51,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:51,060 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 214 transitions. [2020-12-21 21:20:51,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-21 21:20:51,061 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 214 transitions. [2020-12-21 21:20:51,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-12-21 21:20:51,061 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:51,062 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:51,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-21 21:20:51,275 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:51,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:51,276 INFO L82 PathProgramCache]: Analyzing trace with hash 2087562425, now seen corresponding path program 30 times [2020-12-21 21:20:51,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:51,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312270148] [2020-12-21 21:20:51,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:51,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:52,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1516 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-12-21 21:20:52,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312270148] [2020-12-21 21:20:52,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934918469] [2020-12-21 21:20:52,305 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:53,470 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2020-12-21 21:20:53,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:53,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-21 21:20:53,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:54,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1516 backedges. 73 proven. 145 refuted. 0 times theorem prover too weak. 1298 trivial. 0 not checked. [2020-12-21 21:20:54,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:54,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 16] total 54 [2020-12-21 21:20:54,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881880450] [2020-12-21 21:20:54,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-21 21:20:54,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:54,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-21 21:20:54,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=940, Invalid=1922, Unknown=0, NotChecked=0, Total=2862 [2020-12-21 21:20:54,049 INFO L87 Difference]: Start difference. First operand 181 states and 214 transitions. Second operand 54 states. [2020-12-21 21:20:56,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:56,687 INFO L93 Difference]: Finished difference Result 306 states and 380 transitions. [2020-12-21 21:20:56,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-21 21:20:56,688 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 121 [2020-12-21 21:20:56,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:56,690 INFO L225 Difference]: With dead ends: 306 [2020-12-21 21:20:56,690 INFO L226 Difference]: Without dead ends: 202 [2020-12-21 21:20:56,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1732 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2836, Invalid=8084, Unknown=0, NotChecked=0, Total=10920 [2020-12-21 21:20:56,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-12-21 21:20:56,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 191. [2020-12-21 21:20:56,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-12-21 21:20:56,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 226 transitions. [2020-12-21 21:20:56,700 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 226 transitions. Word has length 121 [2020-12-21 21:20:56,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:56,700 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 226 transitions. [2020-12-21 21:20:56,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-21 21:20:56,700 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 226 transitions. [2020-12-21 21:20:56,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-12-21 21:20:56,701 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:56,701 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:56,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-12-21 21:20:56,917 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:56,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:56,917 INFO L82 PathProgramCache]: Analyzing trace with hash 210884027, now seen corresponding path program 31 times [2020-12-21 21:20:56,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:56,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010314178] [2020-12-21 21:20:56,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:56,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:57,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1699 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2020-12-21 21:20:57,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010314178] [2020-12-21 21:20:57,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782096246] [2020-12-21 21:20:57,984 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:58,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:58,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-21 21:20:58,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:58,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1699 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2020-12-21 21:20:58,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:58,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-12-21 21:20:58,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584564410] [2020-12-21 21:20:58,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-21 21:20:58,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:58,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-21 21:20:58,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-21 21:20:58,267 INFO L87 Difference]: Start difference. First operand 191 states and 226 transitions. Second operand 43 states. [2020-12-21 21:20:58,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:58,450 INFO L93 Difference]: Finished difference Result 304 states and 374 transitions. [2020-12-21 21:20:58,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-21 21:20:58,451 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 128 [2020-12-21 21:20:58,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:58,452 INFO L225 Difference]: With dead ends: 304 [2020-12-21 21:20:58,452 INFO L226 Difference]: Without dead ends: 194 [2020-12-21 21:20:58,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-21 21:20:58,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-12-21 21:20:58,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2020-12-21 21:20:58,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-12-21 21:20:58,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 228 transitions. [2020-12-21 21:20:58,461 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 228 transitions. Word has length 128 [2020-12-21 21:20:58,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:58,461 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 228 transitions. [2020-12-21 21:20:58,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-21 21:20:58,461 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 228 transitions. [2020-12-21 21:20:58,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-21 21:20:58,462 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:58,462 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:58,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:58,676 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:58,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:58,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1336997187, now seen corresponding path program 32 times [2020-12-21 21:20:58,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:58,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784159961] [2020-12-21 21:20:58,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:58,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:59,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1778 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2020-12-21 21:20:59,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784159961] [2020-12-21 21:20:59,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169417804] [2020-12-21 21:20:59,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:21:00,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:21:00,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:21:00,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-21 21:21:00,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:21:00,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1778 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2020-12-21 21:21:00,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:21:00,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2020-12-21 21:21:00,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642972568] [2020-12-21 21:21:00,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-21 21:21:00,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:21:00,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-21 21:21:00,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-21 21:21:00,213 INFO L87 Difference]: Start difference. First operand 193 states and 228 transitions. Second operand 44 states. [2020-12-21 21:21:00,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:21:00,381 INFO L93 Difference]: Finished difference Result 306 states and 376 transitions. [2020-12-21 21:21:00,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-21 21:21:00,384 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 130 [2020-12-21 21:21:00,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:21:00,385 INFO L225 Difference]: With dead ends: 306 [2020-12-21 21:21:00,385 INFO L226 Difference]: Without dead ends: 196 [2020-12-21 21:21:00,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-21 21:21:00,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-12-21 21:21:00,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 195. [2020-12-21 21:21:00,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-12-21 21:21:00,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 230 transitions. [2020-12-21 21:21:00,394 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 230 transitions. Word has length 130 [2020-12-21 21:21:00,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:21:00,394 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 230 transitions. [2020-12-21 21:21:00,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-21 21:21:00,394 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 230 transitions. [2020-12-21 21:21:00,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-21 21:21:00,395 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:21:00,395 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:21:00,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:21:00,611 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:21:00,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:21:00,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1502807871, now seen corresponding path program 33 times [2020-12-21 21:21:00,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:21:00,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102635808] [2020-12-21 21:21:00,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:21:00,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:21:01,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1859 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2020-12-21 21:21:01,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102635808] [2020-12-21 21:21:01,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070278260] [2020-12-21 21:21:01,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:21:02,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-12-21 21:21:02,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:21:02,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-21 21:21:02,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:21:02,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1859 backedges. 81 proven. 176 refuted. 0 times theorem prover too weak. 1602 trivial. 0 not checked. [2020-12-21 21:21:02,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:21:02,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 17] total 59 [2020-12-21 21:21:02,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330496441] [2020-12-21 21:21:02,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-12-21 21:21:02,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:21:02,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-12-21 21:21:02,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1127, Invalid=2295, Unknown=0, NotChecked=0, Total=3422 [2020-12-21 21:21:02,884 INFO L87 Difference]: Start difference. First operand 195 states and 230 transitions. Second operand 59 states. [2020-12-21 21:21:06,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:21:06,199 INFO L93 Difference]: Finished difference Result 326 states and 404 transitions. [2020-12-21 21:21:06,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-12-21 21:21:06,200 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 132 [2020-12-21 21:21:06,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:21:06,202 INFO L225 Difference]: With dead ends: 326 [2020-12-21 21:21:06,202 INFO L226 Difference]: Without dead ends: 216 [2020-12-21 21:21:06,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2087 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=3399, Invalid=9711, Unknown=0, NotChecked=0, Total=13110 [2020-12-21 21:21:06,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-12-21 21:21:06,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 205. [2020-12-21 21:21:06,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-12-21 21:21:06,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 242 transitions. [2020-12-21 21:21:06,214 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 242 transitions. Word has length 132 [2020-12-21 21:21:06,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:21:06,215 INFO L481 AbstractCegarLoop]: Abstraction has 205 states and 242 transitions. [2020-12-21 21:21:06,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-12-21 21:21:06,215 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 242 transitions. [2020-12-21 21:21:06,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-12-21 21:21:06,216 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:21:06,216 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:21:06,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:21:06,430 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:21:06,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:21:06,430 INFO L82 PathProgramCache]: Analyzing trace with hash -154835987, now seen corresponding path program 34 times [2020-12-21 21:21:06,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:21:06,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178494562] [2020-12-21 21:21:06,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:21:06,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:21:07,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2061 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2020-12-21 21:21:07,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178494562] [2020-12-21 21:21:07,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296880822] [2020-12-21 21:21:07,882 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:21:08,010 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:21:08,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:21:08,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-21 21:21:08,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:21:08,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2061 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2020-12-21 21:21:08,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:21:08,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2020-12-21 21:21:08,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408180328] [2020-12-21 21:21:08,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-21 21:21:08,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:21:08,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-21 21:21:08,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-21 21:21:08,183 INFO L87 Difference]: Start difference. First operand 205 states and 242 transitions. Second operand 47 states. [2020-12-21 21:21:08,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:21:08,401 INFO L93 Difference]: Finished difference Result 324 states and 398 transitions. [2020-12-21 21:21:08,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-21 21:21:08,402 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 139 [2020-12-21 21:21:08,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:21:08,403 INFO L225 Difference]: With dead ends: 324 [2020-12-21 21:21:08,403 INFO L226 Difference]: Without dead ends: 208 [2020-12-21 21:21:08,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-21 21:21:08,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-12-21 21:21:08,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 207. [2020-12-21 21:21:08,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-12-21 21:21:08,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 244 transitions. [2020-12-21 21:21:08,412 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 244 transitions. Word has length 139 [2020-12-21 21:21:08,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:21:08,413 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 244 transitions. [2020-12-21 21:21:08,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-21 21:21:08,413 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 244 transitions. [2020-12-21 21:21:08,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-12-21 21:21:08,414 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:21:08,414 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:21:08,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-21 21:21:08,628 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:21:08,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:21:08,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1636325803, now seen corresponding path program 35 times [2020-12-21 21:21:08,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:21:08,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970655740] [2020-12-21 21:21:08,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:21:08,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:21:09,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2148 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2020-12-21 21:21:09,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970655740] [2020-12-21 21:21:09,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362629255] [2020-12-21 21:21:09,979 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:21:50,934 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 45 check-sat command(s) [2020-12-21 21:21:50,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:21:50,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-21 21:21:50,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:21:51,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2148 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2020-12-21 21:21:51,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:21:51,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2020-12-21 21:21:51,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191122990] [2020-12-21 21:21:51,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-21 21:21:51,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:21:51,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-21 21:21:51,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-21 21:21:51,170 INFO L87 Difference]: Start difference. First operand 207 states and 244 transitions. Second operand 48 states. [2020-12-21 21:21:51,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:21:51,394 INFO L93 Difference]: Finished difference Result 326 states and 400 transitions. [2020-12-21 21:21:51,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-21 21:21:51,394 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 141 [2020-12-21 21:21:51,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:21:51,396 INFO L225 Difference]: With dead ends: 326 [2020-12-21 21:21:51,396 INFO L226 Difference]: Without dead ends: 210 [2020-12-21 21:21:51,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-21 21:21:51,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-12-21 21:21:51,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2020-12-21 21:21:51,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-12-21 21:21:51,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 246 transitions. [2020-12-21 21:21:51,405 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 246 transitions. Word has length 141 [2020-12-21 21:21:51,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:21:51,405 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 246 transitions. [2020-12-21 21:21:51,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-21 21:21:51,405 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 246 transitions. [2020-12-21 21:21:51,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-12-21 21:21:51,406 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:21:51,406 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:21:51,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:21:51,621 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:21:51,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:21:51,621 INFO L82 PathProgramCache]: Analyzing trace with hash 660920297, now seen corresponding path program 36 times [2020-12-21 21:21:51,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:21:51,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394737584] [2020-12-21 21:21:51,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:21:51,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:21:53,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2237 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2020-12-21 21:21:53,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394737584] [2020-12-21 21:21:53,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799265588] [2020-12-21 21:21:53,198 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:21:54,330 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-12-21 21:21:54,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:21:54,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-21 21:21:54,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:21:55,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2237 backedges. 89 proven. 210 refuted. 0 times theorem prover too weak. 1938 trivial. 0 not checked. [2020-12-21 21:21:55,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:21:55,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 18] total 64 [2020-12-21 21:21:55,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318971024] [2020-12-21 21:21:55,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-12-21 21:21:55,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:21:55,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-12-21 21:21:55,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=2701, Unknown=0, NotChecked=0, Total=4032 [2020-12-21 21:21:55,262 INFO L87 Difference]: Start difference. First operand 209 states and 246 transitions. Second operand 64 states. [2020-12-21 21:21:59,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:21:59,109 INFO L93 Difference]: Finished difference Result 346 states and 428 transitions. [2020-12-21 21:21:59,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-12-21 21:21:59,110 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 143 [2020-12-21 21:21:59,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:21:59,111 INFO L225 Difference]: With dead ends: 346 [2020-12-21 21:21:59,111 INFO L226 Difference]: Without dead ends: 230 [2020-12-21 21:21:59,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2475 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=4013, Invalid=11487, Unknown=0, NotChecked=0, Total=15500 [2020-12-21 21:21:59,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-12-21 21:21:59,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 219. [2020-12-21 21:21:59,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-12-21 21:21:59,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 258 transitions. [2020-12-21 21:21:59,121 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 258 transitions. Word has length 143 [2020-12-21 21:21:59,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:21:59,122 INFO L481 AbstractCegarLoop]: Abstraction has 219 states and 258 transitions. [2020-12-21 21:21:59,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-12-21 21:21:59,122 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 258 transitions. [2020-12-21 21:21:59,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-12-21 21:21:59,123 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:21:59,123 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 13, 13, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:21:59,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:21:59,339 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:21:59,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:21:59,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1745919605, now seen corresponding path program 37 times [2020-12-21 21:21:59,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:21:59,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375593660] [2020-12-21 21:21:59,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:21:59,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:22:01,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2458 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2020-12-21 21:22:01,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375593660] [2020-12-21 21:22:01,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85478206] [2020-12-21 21:22:01,052 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:22:01,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:22:01,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-21 21:22:01,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:22:01,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2458 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2020-12-21 21:22:01,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:22:01,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2020-12-21 21:22:01,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404227938] [2020-12-21 21:22:01,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-21 21:22:01,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:22:01,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-21 21:22:01,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-12-21 21:22:01,380 INFO L87 Difference]: Start difference. First operand 219 states and 258 transitions. Second operand 51 states. [2020-12-21 21:22:01,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:22:01,634 INFO L93 Difference]: Finished difference Result 344 states and 422 transitions. [2020-12-21 21:22:01,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-21 21:22:01,634 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 150 [2020-12-21 21:22:01,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:22:01,636 INFO L225 Difference]: With dead ends: 344 [2020-12-21 21:22:01,636 INFO L226 Difference]: Without dead ends: 222 [2020-12-21 21:22:01,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-12-21 21:22:01,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-12-21 21:22:01,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 221. [2020-12-21 21:22:01,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-12-21 21:22:01,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 260 transitions. [2020-12-21 21:22:01,646 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 260 transitions. Word has length 150 [2020-12-21 21:22:01,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:22:01,646 INFO L481 AbstractCegarLoop]: Abstraction has 221 states and 260 transitions. [2020-12-21 21:22:01,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-21 21:22:01,647 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 260 transitions. [2020-12-21 21:22:01,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-12-21 21:22:01,648 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:22:01,648 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 13, 13, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:22:01,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-12-21 21:22:01,861 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:22:01,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:22:01,862 INFO L82 PathProgramCache]: Analyzing trace with hash -116782835, now seen corresponding path program 38 times [2020-12-21 21:22:01,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:22:01,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564755732] [2020-12-21 21:22:01,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:22:01,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:22:03,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2553 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2020-12-21 21:22:03,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564755732] [2020-12-21 21:22:03,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894965782] [2020-12-21 21:22:03,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:22:03,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:22:03,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:22:03,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-21 21:22:03,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:22:04,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2553 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2020-12-21 21:22:04,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:22:04,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2020-12-21 21:22:04,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337249434] [2020-12-21 21:22:04,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-21 21:22:04,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:22:04,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-21 21:22:04,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-21 21:22:04,011 INFO L87 Difference]: Start difference. First operand 221 states and 260 transitions. Second operand 52 states. [2020-12-21 21:22:04,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:22:04,257 INFO L93 Difference]: Finished difference Result 346 states and 424 transitions. [2020-12-21 21:22:04,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-12-21 21:22:04,258 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 152 [2020-12-21 21:22:04,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:22:04,260 INFO L225 Difference]: With dead ends: 346 [2020-12-21 21:22:04,260 INFO L226 Difference]: Without dead ends: 224 [2020-12-21 21:22:04,260 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-21 21:22:04,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-12-21 21:22:04,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 223. [2020-12-21 21:22:04,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-12-21 21:22:04,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 262 transitions. [2020-12-21 21:22:04,269 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 262 transitions. Word has length 152 [2020-12-21 21:22:04,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:22:04,269 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 262 transitions. [2020-12-21 21:22:04,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-21 21:22:04,269 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 262 transitions. [2020-12-21 21:22:04,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-12-21 21:22:04,270 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:22:04,271 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 13, 13, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:22:04,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-21 21:22:04,484 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:22:04,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:22:04,485 INFO L82 PathProgramCache]: Analyzing trace with hash 2115557391, now seen corresponding path program 39 times [2020-12-21 21:22:04,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:22:04,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860846426] [2020-12-21 21:22:04,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:22:04,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:22:06,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2650 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2020-12-21 21:22:06,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860846426] [2020-12-21 21:22:06,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751096729] [2020-12-21 21:22:06,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:22:06,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-12-21 21:22:06,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:22:06,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-21 21:22:06,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:22:07,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2650 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 2403 trivial. 0 not checked. [2020-12-21 21:22:07,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:22:07,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 17] total 67 [2020-12-21 21:22:07,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567563591] [2020-12-21 21:22:07,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-12-21 21:22:07,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:22:07,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-12-21 21:22:07,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1447, Invalid=2975, Unknown=0, NotChecked=0, Total=4422 [2020-12-21 21:22:07,430 INFO L87 Difference]: Start difference. First operand 223 states and 262 transitions. Second operand 67 states. [2020-12-21 21:22:11,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:22:11,542 INFO L93 Difference]: Finished difference Result 365 states and 450 transitions. [2020-12-21 21:22:11,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-12-21 21:22:11,543 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 154 [2020-12-21 21:22:11,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:22:11,545 INFO L225 Difference]: With dead ends: 365 [2020-12-21 21:22:11,545 INFO L226 Difference]: Without dead ends: 243 [2020-12-21 21:22:11,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2751 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=4335, Invalid=12695, Unknown=0, NotChecked=0, Total=17030 [2020-12-21 21:22:11,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-12-21 21:22:11,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 231. [2020-12-21 21:22:11,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-12-21 21:22:11,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 272 transitions. [2020-12-21 21:22:11,555 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 272 transitions. Word has length 154 [2020-12-21 21:22:11,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:22:11,555 INFO L481 AbstractCegarLoop]: Abstraction has 231 states and 272 transitions. [2020-12-21 21:22:11,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-12-21 21:22:11,556 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 272 transitions. [2020-12-21 21:22:11,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-12-21 21:22:11,557 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:22:11,557 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:22:11,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-21 21:22:11,771 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:22:11,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:22:11,772 INFO L82 PathProgramCache]: Analyzing trace with hash -272658081, now seen corresponding path program 40 times [2020-12-21 21:22:11,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:22:11,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181367356] [2020-12-21 21:22:11,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:22:11,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:22:13,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2789 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-12-21 21:22:13,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181367356] [2020-12-21 21:22:13,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543658818] [2020-12-21 21:22:13,628 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:22:13,797 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:22:13,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:22:13,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-21 21:22:13,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:22:14,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2789 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-12-21 21:22:14,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:22:14,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2020-12-21 21:22:14,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513047996] [2020-12-21 21:22:14,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-21 21:22:14,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:22:14,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-21 21:22:14,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-12-21 21:22:14,010 INFO L87 Difference]: Start difference. First operand 231 states and 272 transitions. Second operand 54 states. [2020-12-21 21:22:14,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:22:14,246 INFO L93 Difference]: Finished difference Result 362 states and 444 transitions. [2020-12-21 21:22:14,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-21 21:22:14,247 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 159 [2020-12-21 21:22:14,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:22:14,248 INFO L225 Difference]: With dead ends: 362 [2020-12-21 21:22:14,248 INFO L226 Difference]: Without dead ends: 234 [2020-12-21 21:22:14,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-12-21 21:22:14,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-12-21 21:22:14,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 233. [2020-12-21 21:22:14,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-12-21 21:22:14,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 274 transitions. [2020-12-21 21:22:14,256 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 274 transitions. Word has length 159 [2020-12-21 21:22:14,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:22:14,256 INFO L481 AbstractCegarLoop]: Abstraction has 233 states and 274 transitions. [2020-12-21 21:22:14,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-21 21:22:14,256 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 274 transitions. [2020-12-21 21:22:14,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-12-21 21:22:14,257 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:22:14,258 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:22:14,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:22:14,473 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:22:14,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:22:14,474 INFO L82 PathProgramCache]: Analyzing trace with hash 570178589, now seen corresponding path program 41 times [2020-12-21 21:22:14,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:22:14,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003049598] [2020-12-21 21:22:14,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:22:14,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:22:16,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2890 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-12-21 21:22:16,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003049598] [2020-12-21 21:22:16,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090382283] [2020-12-21 21:22:16,400 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:24:15,747 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2020-12-21 21:24:15,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:24:15,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-21 21:24:15,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:24:16,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2890 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-12-21 21:24:16,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:24:16,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2020-12-21 21:24:16,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231930915] [2020-12-21 21:24:16,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-21 21:24:16,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:24:16,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-21 21:24:16,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-21 21:24:16,041 INFO L87 Difference]: Start difference. First operand 233 states and 274 transitions. Second operand 55 states.