/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/loop-acceleration/const_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 04:23:02,219 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 04:23:02,222 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 04:23:02,273 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 04:23:02,274 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 04:23:02,278 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 04:23:02,282 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 04:23:02,290 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 04:23:02,294 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 04:23:02,300 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 04:23:02,302 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 04:23:02,304 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 04:23:02,304 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 04:23:02,307 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 04:23:02,309 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 04:23:02,311 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 04:23:02,313 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 04:23:02,317 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 04:23:02,325 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 04:23:02,333 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 04:23:02,335 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 04:23:02,338 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 04:23:02,339 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 04:23:02,342 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 04:23:02,351 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 04:23:02,368 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 04:23:02,427 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 04:23:02,427 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 04:23:02,431 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 04:23:02,432 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 04:23:02,432 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 04:23:02,432 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 04:23:02,432 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 04:23:02,433 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 04:23:02,433 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 04:23:02,433 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 04:23:02,434 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 04:23:02,435 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 04:23:02,435 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 04:23:02,435 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 04:23:02,435 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 04:23:02,436 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 04:23:02,436 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 04:23:02,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:23:02,436 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 04:23:02,436 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 04:23:02,437 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 04:23:02,437 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 04:23:02,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 04:23:02,438 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 04:23:02,438 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 04:23:02,438 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 04:23:02,954 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 04:23:02,997 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 04:23:03,000 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 04:23:03,002 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 04:23:03,003 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 04:23:03,004 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/const_1-2.c [2020-12-22 04:23:03,088 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16af02ad6/35d199aa8b26408ca9ee5285c31b5b66/FLAG2760f66a7 [2020-12-22 04:23:03,659 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 04:23:03,660 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/const_1-2.c [2020-12-22 04:23:03,668 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16af02ad6/35d199aa8b26408ca9ee5285c31b5b66/FLAG2760f66a7 [2020-12-22 04:23:04,014 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16af02ad6/35d199aa8b26408ca9ee5285c31b5b66 [2020-12-22 04:23:04,019 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 04:23:04,022 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 04:23:04,028 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 04:23:04,028 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 04:23:04,033 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 04:23:04,034 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:23:04" (1/1) ... [2020-12-22 04:23:04,037 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73b37025 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:23:04, skipping insertion in model container [2020-12-22 04:23:04,037 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:23:04" (1/1) ... [2020-12-22 04:23:04,045 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 04:23:04,065 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 04:23:04,254 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/loop-acceleration/const_1-2.c[321,334] [2020-12-22 04:23:04,267 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:23:04,277 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 04:23:04,292 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/loop-acceleration/const_1-2.c[321,334] [2020-12-22 04:23:04,295 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:23:04,311 INFO L208 MainTranslator]: Completed translation [2020-12-22 04:23:04,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:23:04 WrapperNode [2020-12-22 04:23:04,312 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 04:23:04,314 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 04:23:04,314 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 04:23:04,314 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 04:23:04,323 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:23:04" (1/1) ... [2020-12-22 04:23:04,331 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:23:04" (1/1) ... [2020-12-22 04:23:04,350 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 04:23:04,351 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 04:23:04,351 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 04:23:04,352 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 04:23:04,361 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:23:04" (1/1) ... [2020-12-22 04:23:04,361 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:23:04" (1/1) ... [2020-12-22 04:23:04,363 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:23:04" (1/1) ... [2020-12-22 04:23:04,363 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:23:04" (1/1) ... [2020-12-22 04:23:04,366 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:23:04" (1/1) ... [2020-12-22 04:23:04,371 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:23:04" (1/1) ... [2020-12-22 04:23:04,372 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:23:04" (1/1) ... [2020-12-22 04:23:04,374 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 04:23:04,375 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 04:23:04,375 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 04:23:04,375 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 04:23:04,376 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:23:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:23:04,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 04:23:04,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 04:23:04,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 04:23:04,474 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 04:23:04,743 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 04:23:04,744 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-22 04:23:04,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:23:04 BoogieIcfgContainer [2020-12-22 04:23:04,758 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 04:23:04,763 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 04:23:04,763 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 04:23:04,777 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 04:23:04,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:23:04" (1/3) ... [2020-12-22 04:23:04,781 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66666d26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:23:04, skipping insertion in model container [2020-12-22 04:23:04,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:23:04" (2/3) ... [2020-12-22 04:23:04,782 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66666d26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:23:04, skipping insertion in model container [2020-12-22 04:23:04,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:23:04" (3/3) ... [2020-12-22 04:23:04,792 INFO L111 eAbstractionObserver]: Analyzing ICFG const_1-2.c [2020-12-22 04:23:04,810 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 04:23:04,821 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 04:23:04,846 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 04:23:04,893 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 04:23:04,893 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 04:23:04,894 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 04:23:04,894 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 04:23:04,894 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 04:23:04,894 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 04:23:04,894 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 04:23:04,894 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 04:23:04,914 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2020-12-22 04:23:04,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 04:23:04,920 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:04,921 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 04:23:04,921 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:04,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:04,930 INFO L82 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2020-12-22 04:23:04,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:04,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537153190] [2020-12-22 04:23:04,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:05,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:05,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:05,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537153190] [2020-12-22 04:23:05,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:23:05,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 04:23:05,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309565183] [2020-12-22 04:23:05,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:23:05,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:05,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:23:05,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:23:05,255 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2020-12-22 04:23:05,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:05,303 INFO L93 Difference]: Finished difference Result 18 states and 22 transitions. [2020-12-22 04:23:05,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:23:05,307 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-22 04:23:05,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:05,324 INFO L225 Difference]: With dead ends: 18 [2020-12-22 04:23:05,325 INFO L226 Difference]: Without dead ends: 8 [2020-12-22 04:23:05,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:23:05,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-12-22 04:23:05,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-12-22 04:23:05,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-12-22 04:23:05,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2020-12-22 04:23:05,367 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2020-12-22 04:23:05,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:05,368 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2020-12-22 04:23:05,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:23:05,368 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2020-12-22 04:23:05,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 04:23:05,369 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:05,369 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:05,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 04:23:05,370 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:05,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:05,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1810510480, now seen corresponding path program 1 times [2020-12-22 04:23:05,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:05,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91859453] [2020-12-22 04:23:05,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:05,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:05,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:05,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91859453] [2020-12-22 04:23:05,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087302493] [2020-12-22 04:23:05,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:05,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:05,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 04:23:05,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:05,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:05,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:05,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 04:23:05,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478467276] [2020-12-22 04:23:05,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 04:23:05,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:05,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 04:23:05,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:23:05,633 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 5 states. [2020-12-22 04:23:05,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:05,648 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2020-12-22 04:23:05,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 04:23:05,649 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-12-22 04:23:05,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:05,650 INFO L225 Difference]: With dead ends: 13 [2020-12-22 04:23:05,650 INFO L226 Difference]: Without dead ends: 9 [2020-12-22 04:23:05,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:23:05,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-12-22 04:23:05,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-12-22 04:23:05,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-12-22 04:23:05,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2020-12-22 04:23:05,654 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2020-12-22 04:23:05,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:05,655 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2020-12-22 04:23:05,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 04:23:05,655 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2020-12-22 04:23:05,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 04:23:05,656 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:05,656 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:05,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 04:23:05,870 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:05,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:05,872 INFO L82 PathProgramCache]: Analyzing trace with hash 292915403, now seen corresponding path program 2 times [2020-12-22 04:23:05,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:05,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796046929] [2020-12-22 04:23:05,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:05,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:05,981 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:05,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796046929] [2020-12-22 04:23:05,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123483979] [2020-12-22 04:23:05,982 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:06,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:23:06,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:23:06,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 04:23:06,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:06,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:06,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:06,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-22 04:23:06,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651166631] [2020-12-22 04:23:06,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 04:23:06,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:06,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 04:23:06,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:23:06,098 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 6 states. [2020-12-22 04:23:06,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:06,119 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2020-12-22 04:23:06,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 04:23:06,119 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-12-22 04:23:06,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:06,120 INFO L225 Difference]: With dead ends: 14 [2020-12-22 04:23:06,120 INFO L226 Difference]: Without dead ends: 10 [2020-12-22 04:23:06,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:23:06,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-22 04:23:06,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-12-22 04:23:06,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-22 04:23:06,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2020-12-22 04:23:06,124 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2020-12-22 04:23:06,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:06,125 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2020-12-22 04:23:06,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 04:23:06,125 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2020-12-22 04:23:06,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 04:23:06,126 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:06,126 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:06,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:06,330 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:06,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:06,331 INFO L82 PathProgramCache]: Analyzing trace with hash 492108272, now seen corresponding path program 3 times [2020-12-22 04:23:06,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:06,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299398727] [2020-12-22 04:23:06,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:06,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:06,484 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:06,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299398727] [2020-12-22 04:23:06,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310129283] [2020-12-22 04:23:06,485 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:06,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 04:23:06,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:23:06,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 04:23:06,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:06,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:06,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:06,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 04:23:06,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257086244] [2020-12-22 04:23:06,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 04:23:06,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:06,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 04:23:06,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:23:06,579 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 7 states. [2020-12-22 04:23:06,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:06,605 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2020-12-22 04:23:06,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 04:23:06,606 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2020-12-22 04:23:06,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:06,606 INFO L225 Difference]: With dead ends: 15 [2020-12-22 04:23:06,606 INFO L226 Difference]: Without dead ends: 11 [2020-12-22 04:23:06,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:23:06,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-12-22 04:23:06,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-12-22 04:23:06,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-22 04:23:06,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2020-12-22 04:23:06,611 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2020-12-22 04:23:06,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:06,611 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2020-12-22 04:23:06,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 04:23:06,611 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2020-12-22 04:23:06,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 04:23:06,612 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:06,612 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:06,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:06,826 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:06,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:06,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1922847381, now seen corresponding path program 4 times [2020-12-22 04:23:06,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:06,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561092495] [2020-12-22 04:23:06,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:06,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:06,965 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:06,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561092495] [2020-12-22 04:23:06,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115559672] [2020-12-22 04:23:06,967 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 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 [2020-12-22 04:23:07,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:23:07,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:23:07,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 04:23:07,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:07,067 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:07,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:07,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-22 04:23:07,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223829884] [2020-12-22 04:23:07,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 04:23:07,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:07,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 04:23:07,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:23:07,070 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 8 states. [2020-12-22 04:23:07,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:07,115 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2020-12-22 04:23:07,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 04:23:07,116 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2020-12-22 04:23:07,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:07,117 INFO L225 Difference]: With dead ends: 16 [2020-12-22 04:23:07,117 INFO L226 Difference]: Without dead ends: 12 [2020-12-22 04:23:07,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:23:07,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-22 04:23:07,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-12-22 04:23:07,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-22 04:23:07,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-12-22 04:23:07,122 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-12-22 04:23:07,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:07,122 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-12-22 04:23:07,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 04:23:07,122 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-12-22 04:23:07,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 04:23:07,123 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:07,123 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:07,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:07,337 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:07,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:07,339 INFO L82 PathProgramCache]: Analyzing trace with hash 522938704, now seen corresponding path program 5 times [2020-12-22 04:23:07,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:07,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180040958] [2020-12-22 04:23:07,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:07,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:07,495 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:07,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180040958] [2020-12-22 04:23:07,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149486131] [2020-12-22 04:23:07,497 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 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 [2020-12-22 04:23:07,555 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-22 04:23:07,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:23:07,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 04:23:07,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:07,655 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:07,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:07,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-22 04:23:07,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998773437] [2020-12-22 04:23:07,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 04:23:07,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:07,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 04:23:07,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:23:07,662 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 9 states. [2020-12-22 04:23:07,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:07,722 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2020-12-22 04:23:07,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 04:23:07,727 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 11 [2020-12-22 04:23:07,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:07,728 INFO L225 Difference]: With dead ends: 17 [2020-12-22 04:23:07,728 INFO L226 Difference]: Without dead ends: 13 [2020-12-22 04:23:07,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:23:07,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-22 04:23:07,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-12-22 04:23:07,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-22 04:23:07,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-12-22 04:23:07,736 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2020-12-22 04:23:07,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:07,738 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-12-22 04:23:07,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 04:23:07,739 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-12-22 04:23:07,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 04:23:07,739 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:07,739 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:07,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-22 04:23:07,941 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:07,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:07,942 INFO L82 PathProgramCache]: Analyzing trace with hash -967103989, now seen corresponding path program 6 times [2020-12-22 04:23:07,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:07,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677665373] [2020-12-22 04:23:07,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:07,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:08,060 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:08,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677665373] [2020-12-22 04:23:08,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428727171] [2020-12-22 04:23:08,061 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 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 [2020-12-22 04:23:08,105 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-22 04:23:08,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:23:08,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 04:23:08,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:08,211 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:08,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:08,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-22 04:23:08,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819943742] [2020-12-22 04:23:08,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 04:23:08,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:08,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 04:23:08,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:23:08,217 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 10 states. [2020-12-22 04:23:08,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:08,299 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-12-22 04:23:08,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 04:23:08,301 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 12 [2020-12-22 04:23:08,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:08,302 INFO L225 Difference]: With dead ends: 18 [2020-12-22 04:23:08,302 INFO L226 Difference]: Without dead ends: 14 [2020-12-22 04:23:08,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:23:08,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-22 04:23:08,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-22 04:23:08,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-22 04:23:08,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-12-22 04:23:08,309 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-12-22 04:23:08,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:08,311 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-12-22 04:23:08,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 04:23:08,311 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-12-22 04:23:08,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 04:23:08,312 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:08,312 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:08,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:08,527 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:08,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:08,528 INFO L82 PathProgramCache]: Analyzing trace with hash 86212784, now seen corresponding path program 7 times [2020-12-22 04:23:08,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:08,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577672462] [2020-12-22 04:23:08,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:08,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:08,671 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:08,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577672462] [2020-12-22 04:23:08,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164527894] [2020-12-22 04:23:08,672 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 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 [2020-12-22 04:23:08,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:08,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 04:23:08,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:08,769 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:08,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:08,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-22 04:23:08,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930172470] [2020-12-22 04:23:08,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 04:23:08,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:08,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 04:23:08,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:23:08,772 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 11 states. [2020-12-22 04:23:08,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:08,835 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-12-22 04:23:08,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 04:23:08,836 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 13 [2020-12-22 04:23:08,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:08,837 INFO L225 Difference]: With dead ends: 19 [2020-12-22 04:23:08,837 INFO L226 Difference]: Without dead ends: 15 [2020-12-22 04:23:08,837 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:23:08,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-22 04:23:08,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-22 04:23:08,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-22 04:23:08,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-12-22 04:23:08,841 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-12-22 04:23:08,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:08,842 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-12-22 04:23:08,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 04:23:08,842 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-12-22 04:23:08,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 04:23:08,843 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:08,843 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:09,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:09,058 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:09,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:09,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1620705621, now seen corresponding path program 8 times [2020-12-22 04:23:09,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:09,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242253664] [2020-12-22 04:23:09,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:09,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:09,202 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:09,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242253664] [2020-12-22 04:23:09,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250859449] [2020-12-22 04:23:09,203 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 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 [2020-12-22 04:23:09,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:23:09,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:23:09,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 04:23:09,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:09,335 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:09,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:09,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-22 04:23:09,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298261256] [2020-12-22 04:23:09,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 04:23:09,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:09,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 04:23:09,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:23:09,341 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 12 states. [2020-12-22 04:23:09,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:09,428 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-12-22 04:23:09,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 04:23:09,429 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 14 [2020-12-22 04:23:09,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:09,431 INFO L225 Difference]: With dead ends: 20 [2020-12-22 04:23:09,431 INFO L226 Difference]: Without dead ends: 16 [2020-12-22 04:23:09,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:23:09,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-22 04:23:09,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-12-22 04:23:09,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-22 04:23:09,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-12-22 04:23:09,447 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-12-22 04:23:09,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:09,448 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-12-22 04:23:09,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 04:23:09,448 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-12-22 04:23:09,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 04:23:09,449 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:09,449 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:09,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-22 04:23:09,665 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:09,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:09,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1299398672, now seen corresponding path program 9 times [2020-12-22 04:23:09,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:09,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388379491] [2020-12-22 04:23:09,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:09,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:09,849 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:09,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388379491] [2020-12-22 04:23:09,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835763991] [2020-12-22 04:23:09,850 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 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 [2020-12-22 04:23:09,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-22 04:23:09,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:23:09,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 04:23:09,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:09,990 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:09,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:09,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-22 04:23:09,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606487484] [2020-12-22 04:23:09,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 04:23:09,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:09,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 04:23:09,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:23:09,993 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 13 states. [2020-12-22 04:23:10,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:10,075 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-12-22 04:23:10,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 04:23:10,075 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 15 [2020-12-22 04:23:10,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:10,076 INFO L225 Difference]: With dead ends: 21 [2020-12-22 04:23:10,076 INFO L226 Difference]: Without dead ends: 17 [2020-12-22 04:23:10,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:23:10,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-22 04:23:10,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-22 04:23:10,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-22 04:23:10,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-12-22 04:23:10,081 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-12-22 04:23:10,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:10,081 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-12-22 04:23:10,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 04:23:10,082 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-12-22 04:23:10,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 04:23:10,082 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:10,082 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:10,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:10,296 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:10,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:10,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1628318539, now seen corresponding path program 10 times [2020-12-22 04:23:10,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:10,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583666921] [2020-12-22 04:23:10,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:10,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:10,516 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:10,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583666921] [2020-12-22 04:23:10,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861797466] [2020-12-22 04:23:10,517 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 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 [2020-12-22 04:23:10,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:23:10,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:23:10,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 04:23:10,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:10,629 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:10,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:10,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-22 04:23:10,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251107504] [2020-12-22 04:23:10,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 04:23:10,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:10,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 04:23:10,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-12-22 04:23:10,632 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 14 states. [2020-12-22 04:23:10,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:10,728 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-12-22 04:23:10,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 04:23:10,728 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 16 [2020-12-22 04:23:10,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:10,729 INFO L225 Difference]: With dead ends: 22 [2020-12-22 04:23:10,729 INFO L226 Difference]: Without dead ends: 18 [2020-12-22 04:23:10,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-12-22 04:23:10,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-22 04:23:10,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-22 04:23:10,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-22 04:23:10,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-12-22 04:23:10,734 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2020-12-22 04:23:10,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:10,734 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-12-22 04:23:10,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 04:23:10,735 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-12-22 04:23:10,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 04:23:10,735 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:10,735 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:10,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:10,950 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:10,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:10,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1060067472, now seen corresponding path program 11 times [2020-12-22 04:23:10,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:10,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371294565] [2020-12-22 04:23:10,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:10,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:11,187 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:11,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371294565] [2020-12-22 04:23:11,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635779875] [2020-12-22 04:23:11,188 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 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 [2020-12-22 04:23:11,433 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-22 04:23:11,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:23:11,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-22 04:23:11,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:11,550 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:11,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:11,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-22 04:23:11,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059320300] [2020-12-22 04:23:11,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 04:23:11,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:11,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 04:23:11,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-12-22 04:23:11,555 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 15 states. [2020-12-22 04:23:11,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:11,663 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-12-22 04:23:11,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 04:23:11,664 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 17 [2020-12-22 04:23:11,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:11,664 INFO L225 Difference]: With dead ends: 23 [2020-12-22 04:23:11,665 INFO L226 Difference]: Without dead ends: 19 [2020-12-22 04:23:11,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-12-22 04:23:11,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-22 04:23:11,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-12-22 04:23:11,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-22 04:23:11,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-12-22 04:23:11,672 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2020-12-22 04:23:11,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:11,672 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-12-22 04:23:11,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 04:23:11,673 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-12-22 04:23:11,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 04:23:11,674 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:11,674 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:11,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 04:23:11,878 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:11,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:11,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1499312107, now seen corresponding path program 12 times [2020-12-22 04:23:11,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:11,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368042017] [2020-12-22 04:23:11,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:11,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:12,146 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:12,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368042017] [2020-12-22 04:23:12,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748461510] [2020-12-22 04:23:12,147 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 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 [2020-12-22 04:23:12,272 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-22 04:23:12,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:23:12,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-22 04:23:12,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:12,438 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:12,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:12,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-22 04:23:12,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749230616] [2020-12-22 04:23:12,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 04:23:12,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:12,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 04:23:12,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:23:12,444 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 16 states. [2020-12-22 04:23:12,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:12,587 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-12-22 04:23:12,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 04:23:12,587 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 18 [2020-12-22 04:23:12,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:12,588 INFO L225 Difference]: With dead ends: 24 [2020-12-22 04:23:12,588 INFO L226 Difference]: Without dead ends: 20 [2020-12-22 04:23:12,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:23:12,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-22 04:23:12,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-22 04:23:12,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-22 04:23:12,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-12-22 04:23:12,593 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2020-12-22 04:23:12,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:12,593 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-12-22 04:23:12,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 04:23:12,593 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-12-22 04:23:12,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 04:23:12,594 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:12,594 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:12,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 04:23:12,798 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:12,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:12,799 INFO L82 PathProgramCache]: Analyzing trace with hash -764299568, now seen corresponding path program 13 times [2020-12-22 04:23:12,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:12,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626264206] [2020-12-22 04:23:12,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:12,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:13,091 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:13,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626264206] [2020-12-22 04:23:13,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287678273] [2020-12-22 04:23:13,092 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 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 [2020-12-22 04:23:13,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:13,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-22 04:23:13,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:13,214 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:13,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:13,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-22 04:23:13,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878674551] [2020-12-22 04:23:13,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 04:23:13,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:13,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 04:23:13,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:23:13,218 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 17 states. [2020-12-22 04:23:13,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:13,371 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-12-22 04:23:13,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 04:23:13,372 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 19 [2020-12-22 04:23:13,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:13,373 INFO L225 Difference]: With dead ends: 25 [2020-12-22 04:23:13,373 INFO L226 Difference]: Without dead ends: 21 [2020-12-22 04:23:13,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:23:13,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-22 04:23:13,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-22 04:23:13,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-22 04:23:13,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-12-22 04:23:13,383 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2020-12-22 04:23:13,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:13,383 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-12-22 04:23:13,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 04:23:13,383 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-12-22 04:23:13,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 04:23:13,384 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:13,384 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:13,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 04:23:13,600 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:13,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:13,601 INFO L82 PathProgramCache]: Analyzing trace with hash 2078182539, now seen corresponding path program 14 times [2020-12-22 04:23:13,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:13,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383331213] [2020-12-22 04:23:13,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:13,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:13,880 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:13,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383331213] [2020-12-22 04:23:13,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558954403] [2020-12-22 04:23:13,881 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 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 [2020-12-22 04:23:13,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:23:13,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:23:13,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-22 04:23:13,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:14,009 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:14,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:14,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-22 04:23:14,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831467859] [2020-12-22 04:23:14,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 04:23:14,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:14,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 04:23:14,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-12-22 04:23:14,013 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 18 states. [2020-12-22 04:23:14,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:14,171 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-12-22 04:23:14,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 04:23:14,172 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 20 [2020-12-22 04:23:14,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:14,173 INFO L225 Difference]: With dead ends: 26 [2020-12-22 04:23:14,173 INFO L226 Difference]: Without dead ends: 22 [2020-12-22 04:23:14,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-12-22 04:23:14,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-22 04:23:14,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-12-22 04:23:14,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-22 04:23:14,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-12-22 04:23:14,185 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2020-12-22 04:23:14,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:14,185 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-12-22 04:23:14,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 04:23:14,185 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-12-22 04:23:14,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 04:23:14,186 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:14,186 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:14,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:14,400 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:14,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:14,401 INFO L82 PathProgramCache]: Analyzing trace with hash 814640, now seen corresponding path program 15 times [2020-12-22 04:23:14,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:14,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393807898] [2020-12-22 04:23:14,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:14,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:14,700 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:14,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393807898] [2020-12-22 04:23:14,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189932037] [2020-12-22 04:23:14,702 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 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 [2020-12-22 04:23:14,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-22 04:23:14,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:23:14,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-22 04:23:14,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:15,022 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:15,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:15,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-22 04:23:15,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56319698] [2020-12-22 04:23:15,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 04:23:15,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:15,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 04:23:15,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:23:15,025 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 19 states. [2020-12-22 04:23:15,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:15,193 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-12-22 04:23:15,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 04:23:15,193 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 21 [2020-12-22 04:23:15,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:15,194 INFO L225 Difference]: With dead ends: 27 [2020-12-22 04:23:15,194 INFO L226 Difference]: Without dead ends: 23 [2020-12-22 04:23:15,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:23:15,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-22 04:23:15,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-22 04:23:15,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-22 04:23:15,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-12-22 04:23:15,199 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2020-12-22 04:23:15,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:15,199 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-12-22 04:23:15,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 04:23:15,199 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-12-22 04:23:15,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 04:23:15,200 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:15,200 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:15,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 04:23:15,405 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:15,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:15,406 INFO L82 PathProgramCache]: Analyzing trace with hash 26919211, now seen corresponding path program 16 times [2020-12-22 04:23:15,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:15,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046263167] [2020-12-22 04:23:15,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:15,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:15,698 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:15,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046263167] [2020-12-22 04:23:15,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743464078] [2020-12-22 04:23:15,699 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 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 [2020-12-22 04:23:15,783 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:23:15,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:23:15,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-22 04:23:15,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:15,852 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:15,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:15,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-22 04:23:15,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954967538] [2020-12-22 04:23:15,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 04:23:15,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:15,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 04:23:15,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-12-22 04:23:15,855 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 20 states. [2020-12-22 04:23:16,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:16,044 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-12-22 04:23:16,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 04:23:16,045 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 22 [2020-12-22 04:23:16,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:16,045 INFO L225 Difference]: With dead ends: 28 [2020-12-22 04:23:16,045 INFO L226 Difference]: Without dead ends: 24 [2020-12-22 04:23:16,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-12-22 04:23:16,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-22 04:23:16,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-22 04:23:16,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-22 04:23:16,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-12-22 04:23:16,050 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2020-12-22 04:23:16,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:16,050 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-12-22 04:23:16,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 04:23:16,050 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-12-22 04:23:16,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 04:23:16,051 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:16,051 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:16,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 04:23:16,267 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:16,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:16,268 INFO L82 PathProgramCache]: Analyzing trace with hash 836160912, now seen corresponding path program 17 times [2020-12-22 04:23:16,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:16,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917229480] [2020-12-22 04:23:16,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:16,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:16,624 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:16,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917229480] [2020-12-22 04:23:16,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353387372] [2020-12-22 04:23:16,625 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 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 [2020-12-22 04:23:17,579 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-12-22 04:23:17,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:23:17,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-22 04:23:17,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:17,747 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:17,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:17,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-22 04:23:17,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674936328] [2020-12-22 04:23:17,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 04:23:17,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:17,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 04:23:17,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-12-22 04:23:17,749 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 21 states. [2020-12-22 04:23:17,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:17,993 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-12-22 04:23:17,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 04:23:17,994 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 23 [2020-12-22 04:23:17,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:17,995 INFO L225 Difference]: With dead ends: 29 [2020-12-22 04:23:17,995 INFO L226 Difference]: Without dead ends: 25 [2020-12-22 04:23:17,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-12-22 04:23:17,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-22 04:23:17,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-12-22 04:23:17,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-22 04:23:17,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-12-22 04:23:17,999 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2020-12-22 04:23:17,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:17,999 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-12-22 04:23:17,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 04:23:17,999 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-12-22 04:23:18,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 04:23:18,000 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:18,000 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:18,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 04:23:18,206 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:18,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:18,207 INFO L82 PathProgramCache]: Analyzing trace with hash 152849867, now seen corresponding path program 18 times [2020-12-22 04:23:18,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:18,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516554951] [2020-12-22 04:23:18,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:18,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:18,611 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:18,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516554951] [2020-12-22 04:23:18,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020508554] [2020-12-22 04:23:18,612 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 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 [2020-12-22 04:23:18,893 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-12-22 04:23:18,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:23:18,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-22 04:23:18,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:19,092 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:19,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:19,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-22 04:23:19,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762595436] [2020-12-22 04:23:19,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 04:23:19,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:19,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 04:23:19,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-12-22 04:23:19,097 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 22 states. [2020-12-22 04:23:19,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:19,344 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-12-22 04:23:19,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 04:23:19,344 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 24 [2020-12-22 04:23:19,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:19,345 INFO L225 Difference]: With dead ends: 30 [2020-12-22 04:23:19,345 INFO L226 Difference]: Without dead ends: 26 [2020-12-22 04:23:19,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-12-22 04:23:19,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-22 04:23:19,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-12-22 04:23:19,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-22 04:23:19,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-12-22 04:23:19,350 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2020-12-22 04:23:19,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:19,351 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-12-22 04:23:19,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 04:23:19,351 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-12-22 04:23:19,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 04:23:19,351 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:19,351 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:19,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:19,552 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:19,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:19,553 INFO L82 PathProgramCache]: Analyzing trace with hash 445043952, now seen corresponding path program 19 times [2020-12-22 04:23:19,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:19,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562710461] [2020-12-22 04:23:19,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:19,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:20,000 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:20,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562710461] [2020-12-22 04:23:20,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512569677] [2020-12-22 04:23:20,001 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 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 [2020-12-22 04:23:20,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:20,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-22 04:23:20,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:20,150 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:20,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:20,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-22 04:23:20,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231755112] [2020-12-22 04:23:20,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 04:23:20,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:20,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 04:23:20,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-12-22 04:23:20,152 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 23 states. [2020-12-22 04:23:20,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:20,397 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-12-22 04:23:20,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 04:23:20,398 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 25 [2020-12-22 04:23:20,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:20,399 INFO L225 Difference]: With dead ends: 31 [2020-12-22 04:23:20,399 INFO L226 Difference]: Without dead ends: 27 [2020-12-22 04:23:20,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-12-22 04:23:20,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-22 04:23:20,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-22 04:23:20,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-22 04:23:20,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-12-22 04:23:20,403 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2020-12-22 04:23:20,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:20,404 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-12-22 04:23:20,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 04:23:20,404 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-12-22 04:23:20,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 04:23:20,404 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:20,404 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:20,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:20,620 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:20,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:20,621 INFO L82 PathProgramCache]: Analyzing trace with hash 913125995, now seen corresponding path program 20 times [2020-12-22 04:23:20,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:20,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766820371] [2020-12-22 04:23:20,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:20,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:21,112 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:21,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766820371] [2020-12-22 04:23:21,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438655364] [2020-12-22 04:23:21,113 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 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 [2020-12-22 04:23:21,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:23:21,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:23:21,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-22 04:23:21,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:21,246 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:21,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:21,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-22 04:23:21,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137072784] [2020-12-22 04:23:21,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 04:23:21,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:21,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 04:23:21,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-12-22 04:23:21,249 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 24 states. [2020-12-22 04:23:21,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:21,554 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-12-22 04:23:21,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 04:23:21,555 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 26 [2020-12-22 04:23:21,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:21,556 INFO L225 Difference]: With dead ends: 32 [2020-12-22 04:23:21,556 INFO L226 Difference]: Without dead ends: 28 [2020-12-22 04:23:21,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-12-22 04:23:21,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-22 04:23:21,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-22 04:23:21,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-22 04:23:21,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-12-22 04:23:21,573 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2020-12-22 04:23:21,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:21,573 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-12-22 04:23:21,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 04:23:21,573 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-12-22 04:23:21,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 04:23:21,574 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:21,574 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:21,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-22 04:23:21,782 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:21,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:21,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1756199856, now seen corresponding path program 21 times [2020-12-22 04:23:21,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:21,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410247780] [2020-12-22 04:23:21,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:21,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:22,291 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:22,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410247780] [2020-12-22 04:23:22,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029183545] [2020-12-22 04:23:22,291 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 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 [2020-12-22 04:23:22,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-12-22 04:23:22,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:23:22,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 55 conjunts are in the unsatisfiable core [2020-12-22 04:23:22,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:23,058 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:23,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:23,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-22 04:23:23,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592749655] [2020-12-22 04:23:23,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 04:23:23,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:23,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 04:23:23,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:23:23,060 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 25 states. [2020-12-22 04:23:23,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:23,408 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2020-12-22 04:23:23,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 04:23:23,409 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 27 [2020-12-22 04:23:23,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:23,409 INFO L225 Difference]: With dead ends: 33 [2020-12-22 04:23:23,409 INFO L226 Difference]: Without dead ends: 29 [2020-12-22 04:23:23,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 10 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:23:23,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-22 04:23:23,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-12-22 04:23:23,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-22 04:23:23,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-12-22 04:23:23,414 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2020-12-22 04:23:23,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:23,414 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-12-22 04:23:23,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 04:23:23,414 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-12-22 04:23:23,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 04:23:23,415 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:23,415 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:23,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 04:23:23,619 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:23,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:23,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1394044683, now seen corresponding path program 22 times [2020-12-22 04:23:23,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:23,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513547383] [2020-12-22 04:23:23,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:23,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:24,189 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:24,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513547383] [2020-12-22 04:23:24,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914775058] [2020-12-22 04:23:24,189 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 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 [2020-12-22 04:23:24,246 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:23:24,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:23:24,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-22 04:23:24,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:24,345 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:24,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:24,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-22 04:23:24,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090082212] [2020-12-22 04:23:24,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 04:23:24,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:24,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 04:23:24,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-12-22 04:23:24,347 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 26 states. [2020-12-22 04:23:24,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:24,727 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-12-22 04:23:24,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 04:23:24,728 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 28 [2020-12-22 04:23:24,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:24,728 INFO L225 Difference]: With dead ends: 34 [2020-12-22 04:23:24,728 INFO L226 Difference]: Without dead ends: 30 [2020-12-22 04:23:24,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-12-22 04:23:24,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-22 04:23:24,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-12-22 04:23:24,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-22 04:23:24,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2020-12-22 04:23:24,733 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2020-12-22 04:23:24,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:24,734 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2020-12-22 04:23:24,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 04:23:24,734 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2020-12-22 04:23:24,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-22 04:23:24,735 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:24,735 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:24,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:24,948 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:24,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:24,949 INFO L82 PathProgramCache]: Analyzing trace with hash 267377584, now seen corresponding path program 23 times [2020-12-22 04:23:24,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:24,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757171331] [2020-12-22 04:23:24,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:24,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:25,517 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:25,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757171331] [2020-12-22 04:23:25,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017157628] [2020-12-22 04:23:25,517 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 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 [2020-12-22 04:23:29,856 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-12-22 04:23:29,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:23:29,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-22 04:23:29,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:29,962 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:29,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:29,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-22 04:23:29,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16452850] [2020-12-22 04:23:29,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 04:23:29,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:29,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 04:23:29,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-12-22 04:23:29,965 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 27 states. [2020-12-22 04:23:30,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:30,332 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2020-12-22 04:23:30,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 04:23:30,332 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 29 [2020-12-22 04:23:30,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:30,333 INFO L225 Difference]: With dead ends: 35 [2020-12-22 04:23:30,333 INFO L226 Difference]: Without dead ends: 31 [2020-12-22 04:23:30,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-12-22 04:23:30,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-22 04:23:30,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-12-22 04:23:30,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-22 04:23:30,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-12-22 04:23:30,337 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2020-12-22 04:23:30,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:30,337 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-12-22 04:23:30,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-22 04:23:30,338 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-12-22 04:23:30,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 04:23:30,338 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:30,338 INFO L422 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:30,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 04:23:30,543 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:30,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:30,543 INFO L82 PathProgramCache]: Analyzing trace with hash -299564117, now seen corresponding path program 24 times [2020-12-22 04:23:30,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:30,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458116284] [2020-12-22 04:23:30,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:30,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:31,124 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:31,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458116284] [2020-12-22 04:23:31,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466823242] [2020-12-22 04:23:31,124 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 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 [2020-12-22 04:23:31,724 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-22 04:23:31,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:23:31,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 62 conjunts are in the unsatisfiable core [2020-12-22 04:23:31,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:32,152 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:32,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:32,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-22 04:23:32,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292329156] [2020-12-22 04:23:32,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 04:23:32,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:32,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 04:23:32,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-12-22 04:23:32,155 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 28 states. [2020-12-22 04:23:32,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:32,587 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-12-22 04:23:32,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 04:23:32,588 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 30 [2020-12-22 04:23:32,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:32,588 INFO L225 Difference]: With dead ends: 36 [2020-12-22 04:23:32,589 INFO L226 Difference]: Without dead ends: 32 [2020-12-22 04:23:32,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 12 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-12-22 04:23:32,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-22 04:23:32,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-22 04:23:32,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-22 04:23:32,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-12-22 04:23:32,594 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2020-12-22 04:23:32,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:32,594 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-12-22 04:23:32,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 04:23:32,594 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-12-22 04:23:32,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-22 04:23:32,595 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:32,595 INFO L422 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:32,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:32,798 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:32,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:32,799 INFO L82 PathProgramCache]: Analyzing trace with hash -694887664, now seen corresponding path program 25 times [2020-12-22 04:23:32,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:32,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286506800] [2020-12-22 04:23:32,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:32,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:33,498 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:33,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286506800] [2020-12-22 04:23:33,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166972251] [2020-12-22 04:23:33,499 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 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 [2020-12-22 04:23:33,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:33,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-22 04:23:33,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:33,655 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:33,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:33,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-22 04:23:33,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863854257] [2020-12-22 04:23:33,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 04:23:33,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:33,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 04:23:33,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-12-22 04:23:33,658 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 29 states. [2020-12-22 04:23:34,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:34,114 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2020-12-22 04:23:34,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 04:23:34,115 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 31 [2020-12-22 04:23:34,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:34,116 INFO L225 Difference]: With dead ends: 37 [2020-12-22 04:23:34,116 INFO L226 Difference]: Without dead ends: 33 [2020-12-22 04:23:34,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-12-22 04:23:34,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-22 04:23:34,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-12-22 04:23:34,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-22 04:23:34,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-12-22 04:23:34,122 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2020-12-22 04:23:34,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:34,122 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-12-22 04:23:34,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-22 04:23:34,122 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-12-22 04:23:34,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-22 04:23:34,123 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:34,123 INFO L422 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:34,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 04:23:34,328 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:34,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:34,328 INFO L82 PathProgramCache]: Analyzing trace with hash -65015733, now seen corresponding path program 26 times [2020-12-22 04:23:34,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:34,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215761257] [2020-12-22 04:23:34,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:34,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:35,017 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:35,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215761257] [2020-12-22 04:23:35,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137983900] [2020-12-22 04:23:35,023 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 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 [2020-12-22 04:23:35,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:23:35,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:23:35,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 55 conjunts are in the unsatisfiable core [2020-12-22 04:23:35,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:35,167 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:35,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:35,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-22 04:23:35,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816853261] [2020-12-22 04:23:35,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 04:23:35,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:35,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 04:23:35,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2020-12-22 04:23:35,169 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 30 states. [2020-12-22 04:23:35,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:35,726 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-12-22 04:23:35,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 04:23:35,727 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 32 [2020-12-22 04:23:35,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:35,727 INFO L225 Difference]: With dead ends: 38 [2020-12-22 04:23:35,727 INFO L226 Difference]: Without dead ends: 34 [2020-12-22 04:23:35,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2020-12-22 04:23:35,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-22 04:23:35,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-12-22 04:23:35,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-22 04:23:35,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2020-12-22 04:23:35,732 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2020-12-22 04:23:35,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:35,732 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2020-12-22 04:23:35,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 04:23:35,732 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2020-12-22 04:23:35,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-22 04:23:35,733 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:35,733 INFO L422 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:35,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 04:23:35,936 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:35,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:35,936 INFO L82 PathProgramCache]: Analyzing trace with hash -2013822352, now seen corresponding path program 27 times [2020-12-22 04:23:35,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:35,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455223783] [2020-12-22 04:23:35,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:35,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:36,621 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:36,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455223783] [2020-12-22 04:23:36,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920764769] [2020-12-22 04:23:36,621 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 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 [2020-12-22 04:23:37,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-12-22 04:23:37,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:23:37,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 65 conjunts are in the unsatisfiable core [2020-12-22 04:23:37,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:37,550 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:37,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:37,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-12-22 04:23:37,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362650479] [2020-12-22 04:23:37,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-22 04:23:37,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:37,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-22 04:23:37,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-12-22 04:23:37,552 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 31 states. [2020-12-22 04:23:38,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:38,166 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2020-12-22 04:23:38,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 04:23:38,167 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 33 [2020-12-22 04:23:38,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:38,167 INFO L225 Difference]: With dead ends: 39 [2020-12-22 04:23:38,167 INFO L226 Difference]: Without dead ends: 35 [2020-12-22 04:23:38,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 25 SyntacticMatches, 8 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-12-22 04:23:38,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-22 04:23:38,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-12-22 04:23:38,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-22 04:23:38,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-12-22 04:23:38,171 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2020-12-22 04:23:38,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:38,171 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-12-22 04:23:38,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-22 04:23:38,171 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-12-22 04:23:38,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 04:23:38,172 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:38,172 INFO L422 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:38,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 04:23:38,373 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:38,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:38,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1997681899, now seen corresponding path program 28 times [2020-12-22 04:23:38,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:38,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009774651] [2020-12-22 04:23:38,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:38,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:39,095 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:39,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009774651] [2020-12-22 04:23:39,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609737331] [2020-12-22 04:23:39,096 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 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 [2020-12-22 04:23:39,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:23:39,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:23:39,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 59 conjunts are in the unsatisfiable core [2020-12-22 04:23:39,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:39,248 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:39,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:39,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-12-22 04:23:39,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599570781] [2020-12-22 04:23:39,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 04:23:39,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:39,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 04:23:39,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2020-12-22 04:23:39,250 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 32 states. [2020-12-22 04:23:39,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:39,904 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-12-22 04:23:39,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-22 04:23:39,905 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 34 [2020-12-22 04:23:39,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:39,905 INFO L225 Difference]: With dead ends: 40 [2020-12-22 04:23:39,905 INFO L226 Difference]: Without dead ends: 36 [2020-12-22 04:23:39,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2020-12-22 04:23:39,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-22 04:23:39,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-12-22 04:23:39,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-22 04:23:39,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2020-12-22 04:23:39,910 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2020-12-22 04:23:39,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:39,910 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2020-12-22 04:23:39,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 04:23:39,911 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2020-12-22 04:23:39,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-22 04:23:39,911 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:39,911 INFO L422 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:40,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 04:23:40,112 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:40,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:40,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1800262096, now seen corresponding path program 29 times [2020-12-22 04:23:40,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:40,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832728222] [2020-12-22 04:23:40,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:40,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:40,988 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:40,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832728222] [2020-12-22 04:23:40,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623478877] [2020-12-22 04:23:40,989 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 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 [2020-12-22 04:23:43,548 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2020-12-22 04:23:43,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:23:43,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 85 conjunts are in the unsatisfiable core [2020-12-22 04:23:43,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:44,464 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:44,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:44,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-12-22 04:23:44,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784338448] [2020-12-22 04:23:44,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 04:23:44,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:44,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 04:23:44,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 04:23:44,466 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 33 states. [2020-12-22 04:23:45,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:45,154 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-12-22 04:23:45,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 04:23:45,155 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 35 [2020-12-22 04:23:45,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:45,156 INFO L225 Difference]: With dead ends: 41 [2020-12-22 04:23:45,157 INFO L226 Difference]: Without dead ends: 37 [2020-12-22 04:23:45,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 10 SyntacticMatches, 25 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 04:23:45,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-22 04:23:45,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-12-22 04:23:45,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-22 04:23:45,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-12-22 04:23:45,161 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2020-12-22 04:23:45,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:45,162 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-12-22 04:23:45,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 04:23:45,162 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-12-22 04:23:45,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-22 04:23:45,162 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:45,162 INFO L422 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:45,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:45,367 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:45,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:45,368 INFO L82 PathProgramCache]: Analyzing trace with hash -24784501, now seen corresponding path program 30 times [2020-12-22 04:23:45,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:45,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500791466] [2020-12-22 04:23:45,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:45,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:46,291 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:46,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500791466] [2020-12-22 04:23:46,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201194296] [2020-12-22 04:23:46,291 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 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 [2020-12-22 04:23:49,148 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2020-12-22 04:23:49,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:23:49,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 77 conjunts are in the unsatisfiable core [2020-12-22 04:23:49,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:49,825 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:49,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:49,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-12-22 04:23:49,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715002738] [2020-12-22 04:23:49,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-22 04:23:49,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:49,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-22 04:23:49,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 04:23:49,827 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 34 states. [2020-12-22 04:23:50,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:50,544 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-12-22 04:23:50,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-22 04:23:50,545 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 36 [2020-12-22 04:23:50,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:50,546 INFO L225 Difference]: With dead ends: 42 [2020-12-22 04:23:50,546 INFO L226 Difference]: Without dead ends: 38 [2020-12-22 04:23:50,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 14 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 04:23:50,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-22 04:23:50,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-12-22 04:23:50,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-22 04:23:50,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-12-22 04:23:50,552 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2020-12-22 04:23:50,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:50,553 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-12-22 04:23:50,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-22 04:23:50,553 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-12-22 04:23:50,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 04:23:50,553 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:50,553 INFO L422 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:50,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:50,759 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:50,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:50,760 INFO L82 PathProgramCache]: Analyzing trace with hash -766654160, now seen corresponding path program 31 times [2020-12-22 04:23:50,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:50,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247646005] [2020-12-22 04:23:50,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:50,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:51,726 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:51,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247646005] [2020-12-22 04:23:51,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254936519] [2020-12-22 04:23:51,726 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 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 [2020-12-22 04:23:51,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:51,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 65 conjunts are in the unsatisfiable core [2020-12-22 04:23:51,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:51,911 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:51,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:51,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-12-22 04:23:51,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484649309] [2020-12-22 04:23:51,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-22 04:23:51,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:51,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-22 04:23:51,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 04:23:51,913 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 35 states. [2020-12-22 04:23:52,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:52,716 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2020-12-22 04:23:52,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 04:23:52,717 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 37 [2020-12-22 04:23:52,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:52,718 INFO L225 Difference]: With dead ends: 43 [2020-12-22 04:23:52,718 INFO L226 Difference]: Without dead ends: 39 [2020-12-22 04:23:52,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 04:23:52,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-22 04:23:52,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-12-22 04:23:52,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-22 04:23:52,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2020-12-22 04:23:52,722 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2020-12-22 04:23:52,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:52,722 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2020-12-22 04:23:52,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-22 04:23:52,723 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2020-12-22 04:23:52,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 04:23:52,723 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:52,723 INFO L422 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:52,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:52,924 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:52,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:52,925 INFO L82 PathProgramCache]: Analyzing trace with hash 2005190187, now seen corresponding path program 32 times [2020-12-22 04:23:52,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:52,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334616309] [2020-12-22 04:23:52,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:52,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:53,862 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:53,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334616309] [2020-12-22 04:23:53,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063975898] [2020-12-22 04:23:53,863 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 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 [2020-12-22 04:23:53,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:23:53,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:23:53,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 67 conjunts are in the unsatisfiable core [2020-12-22 04:23:53,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:54,038 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:54,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:54,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-12-22 04:23:54,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601749084] [2020-12-22 04:23:54,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-22 04:23:54,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:54,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-22 04:23:54,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 04:23:54,040 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 36 states. [2020-12-22 04:23:54,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:54,864 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-12-22 04:23:54,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-22 04:23:54,865 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 38 [2020-12-22 04:23:54,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:54,866 INFO L225 Difference]: With dead ends: 44 [2020-12-22 04:23:54,866 INFO L226 Difference]: Without dead ends: 40 [2020-12-22 04:23:54,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 04:23:54,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-22 04:23:54,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-12-22 04:23:54,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-22 04:23:54,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2020-12-22 04:23:54,874 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2020-12-22 04:23:54,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:54,874 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2020-12-22 04:23:54,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-22 04:23:54,874 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2020-12-22 04:23:54,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-22 04:23:54,874 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:54,875 INFO L422 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:55,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-22 04:23:55,081 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:55,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:55,082 INFO L82 PathProgramCache]: Analyzing trace with hash 2033019024, now seen corresponding path program 33 times [2020-12-22 04:23:55,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:55,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783986540] [2020-12-22 04:23:55,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:55,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:56,089 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:56,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783986540] [2020-12-22 04:23:56,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860357092] [2020-12-22 04:23:56,090 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 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 [2020-12-22 04:23:56,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2020-12-22 04:23:56,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:23:56,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 69 conjunts are in the unsatisfiable core [2020-12-22 04:23:56,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:57,126 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:57,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:57,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-12-22 04:23:57,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831134466] [2020-12-22 04:23:57,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-22 04:23:57,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:57,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-22 04:23:57,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 04:23:57,128 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 37 states. [2020-12-22 04:23:58,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:58,023 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2020-12-22 04:23:58,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 04:23:58,023 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 39 [2020-12-22 04:23:58,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:58,024 INFO L225 Difference]: With dead ends: 45 [2020-12-22 04:23:58,024 INFO L226 Difference]: Without dead ends: 41 [2020-12-22 04:23:58,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 04:23:58,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-22 04:23:58,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-12-22 04:23:58,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-22 04:23:58,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-12-22 04:23:58,029 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2020-12-22 04:23:58,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:58,029 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-12-22 04:23:58,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-22 04:23:58,029 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-12-22 04:23:58,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 04:23:58,030 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:58,030 INFO L422 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:58,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:58,233 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:58,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:58,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1399254325, now seen corresponding path program 34 times [2020-12-22 04:23:58,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:58,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945967848] [2020-12-22 04:23:58,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:58,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:59,327 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:59,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945967848] [2020-12-22 04:23:59,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077479252] [2020-12-22 04:23:59,327 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 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 [2020-12-22 04:23:59,394 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:23:59,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:23:59,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 71 conjunts are in the unsatisfiable core [2020-12-22 04:23:59,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:59,519 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:59,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:59,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-12-22 04:23:59,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24036669] [2020-12-22 04:23:59,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-22 04:23:59,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:59,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-22 04:23:59,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 04:23:59,522 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 38 states. [2020-12-22 04:24:00,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:00,477 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-12-22 04:24:00,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-22 04:24:00,477 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 40 [2020-12-22 04:24:00,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:00,478 INFO L225 Difference]: With dead ends: 46 [2020-12-22 04:24:00,478 INFO L226 Difference]: Without dead ends: 42 [2020-12-22 04:24:00,479 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 04:24:00,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-22 04:24:00,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-12-22 04:24:00,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-22 04:24:00,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-12-22 04:24:00,481 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2020-12-22 04:24:00,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:00,482 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-12-22 04:24:00,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-22 04:24:00,482 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-12-22 04:24:00,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 04:24:00,482 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:00,482 INFO L422 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:00,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-22 04:24:00,683 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:00,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:00,684 INFO L82 PathProgramCache]: Analyzing trace with hash -425545744, now seen corresponding path program 35 times [2020-12-22 04:24:00,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:00,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613949123] [2020-12-22 04:24:00,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:00,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:01,803 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:01,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613949123] [2020-12-22 04:24:01,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321443502] [2020-12-22 04:24:01,804 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 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 [2020-12-22 04:24:18,932 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2020-12-22 04:24:18,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:24:18,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 107 conjunts are in the unsatisfiable core [2020-12-22 04:24:18,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:20,388 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:20,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:20,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-12-22 04:24:20,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979657239] [2020-12-22 04:24:20,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 04:24:20,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:20,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 04:24:20,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 04:24:20,390 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 39 states. [2020-12-22 04:24:21,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:21,406 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2020-12-22 04:24:21,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-22 04:24:21,407 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 41 [2020-12-22 04:24:21,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:21,407 INFO L225 Difference]: With dead ends: 47 [2020-12-22 04:24:21,408 INFO L226 Difference]: Without dead ends: 43 [2020-12-22 04:24:21,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 7 SyntacticMatches, 34 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 04:24:21,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-22 04:24:21,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-12-22 04:24:21,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-22 04:24:21,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-12-22 04:24:21,411 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2020-12-22 04:24:21,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:21,411 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-12-22 04:24:21,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 04:24:21,412 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-12-22 04:24:21,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 04:24:21,412 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:21,412 INFO L422 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:21,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:21,618 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:21,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:21,618 INFO L82 PathProgramCache]: Analyzing trace with hash -305350805, now seen corresponding path program 36 times [2020-12-22 04:24:21,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:21,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622784451] [2020-12-22 04:24:21,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:21,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:22,907 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:22,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622784451] [2020-12-22 04:24:22,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671852019] [2020-12-22 04:24:22,907 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 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 [2020-12-22 04:24:24,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-22 04:24:24,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:24:24,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 90 conjunts are in the unsatisfiable core [2020-12-22 04:24:24,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:25,830 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:25,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:25,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-22 04:24:25,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809289750] [2020-12-22 04:24:25,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-22 04:24:25,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:25,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-22 04:24:25,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 04:24:25,833 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 40 states. [2020-12-22 04:24:26,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:26,913 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-12-22 04:24:26,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-22 04:24:26,914 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 42 [2020-12-22 04:24:26,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:26,915 INFO L225 Difference]: With dead ends: 48 [2020-12-22 04:24:26,915 INFO L226 Difference]: Without dead ends: 44 [2020-12-22 04:24:26,916 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 27 SyntacticMatches, 15 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 04:24:26,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-22 04:24:26,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-12-22 04:24:26,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-22 04:24:26,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2020-12-22 04:24:26,919 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2020-12-22 04:24:26,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:26,920 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2020-12-22 04:24:26,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-22 04:24:26,920 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2020-12-22 04:24:26,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 04:24:26,920 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:26,920 INFO L422 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:27,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-22 04:24:27,125 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:27,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:27,125 INFO L82 PathProgramCache]: Analyzing trace with hash -874274992, now seen corresponding path program 37 times [2020-12-22 04:24:27,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:27,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637176731] [2020-12-22 04:24:27,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:27,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:28,457 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:28,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637176731] [2020-12-22 04:24:28,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135631187] [2020-12-22 04:24:28,458 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 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 [2020-12-22 04:24:28,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:28,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 77 conjunts are in the unsatisfiable core [2020-12-22 04:24:28,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:28,650 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:28,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:28,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-12-22 04:24:28,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977857444] [2020-12-22 04:24:28,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-22 04:24:28,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:28,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-22 04:24:28,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 04:24:28,653 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 41 states. [2020-12-22 04:24:29,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:29,776 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2020-12-22 04:24:29,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-22 04:24:29,776 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 43 [2020-12-22 04:24:29,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:29,777 INFO L225 Difference]: With dead ends: 49 [2020-12-22 04:24:29,777 INFO L226 Difference]: Without dead ends: 45 [2020-12-22 04:24:29,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 04:24:29,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-22 04:24:29,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-12-22 04:24:29,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-22 04:24:29,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2020-12-22 04:24:29,781 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2020-12-22 04:24:29,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:29,781 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2020-12-22 04:24:29,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-22 04:24:29,781 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2020-12-22 04:24:29,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 04:24:29,781 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:29,782 INFO L422 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:29,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-22 04:24:29,983 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:29,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:29,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1331055605, now seen corresponding path program 38 times [2020-12-22 04:24:29,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:29,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037988450] [2020-12-22 04:24:29,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:30,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:31,371 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:31,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037988450] [2020-12-22 04:24:31,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086754552] [2020-12-22 04:24:31,372 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 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 [2020-12-22 04:24:31,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:24:31,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:24:31,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 79 conjunts are in the unsatisfiable core [2020-12-22 04:24:31,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:31,579 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:31,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:31,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-12-22 04:24:31,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012082325] [2020-12-22 04:24:31,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-22 04:24:31,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:31,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-22 04:24:31,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 04:24:31,582 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 42 states. [2020-12-22 04:24:32,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:32,726 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-12-22 04:24:32,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-22 04:24:32,726 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 44 [2020-12-22 04:24:32,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:32,727 INFO L225 Difference]: With dead ends: 50 [2020-12-22 04:24:32,727 INFO L226 Difference]: Without dead ends: 46 [2020-12-22 04:24:32,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 04:24:32,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-22 04:24:32,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-12-22 04:24:32,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-22 04:24:32,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2020-12-22 04:24:32,731 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2020-12-22 04:24:32,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:32,731 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2020-12-22 04:24:32,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-22 04:24:32,731 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2020-12-22 04:24:32,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-22 04:24:32,731 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:32,732 INFO L422 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:32,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-22 04:24:32,934 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:32,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:32,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1688614576, now seen corresponding path program 39 times [2020-12-22 04:24:32,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:32,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114429913] [2020-12-22 04:24:32,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:32,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:34,349 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:34,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114429913] [2020-12-22 04:24:34,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771873271] [2020-12-22 04:24:34,350 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 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 [2020-12-22 04:24:35,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2020-12-22 04:24:35,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:24:35,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 96 conjunts are in the unsatisfiable core [2020-12-22 04:24:35,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:36,792 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:36,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:36,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-12-22 04:24:36,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141328898] [2020-12-22 04:24:36,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-22 04:24:36,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:36,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-22 04:24:36,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 04:24:36,795 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 43 states. [2020-12-22 04:24:38,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:38,059 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-12-22 04:24:38,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-22 04:24:38,060 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 45 [2020-12-22 04:24:38,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:38,060 INFO L225 Difference]: With dead ends: 51 [2020-12-22 04:24:38,060 INFO L226 Difference]: Without dead ends: 47 [2020-12-22 04:24:38,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 30 SyntacticMatches, 15 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 04:24:38,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-22 04:24:38,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-12-22 04:24:38,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-22 04:24:38,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-12-22 04:24:38,064 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2020-12-22 04:24:38,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:38,064 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-12-22 04:24:38,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-22 04:24:38,064 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-12-22 04:24:38,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 04:24:38,065 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:38,065 INFO L422 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:38,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-22 04:24:38,270 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:38,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:38,270 INFO L82 PathProgramCache]: Analyzing trace with hash 809109675, now seen corresponding path program 40 times [2020-12-22 04:24:38,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:38,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262128640] [2020-12-22 04:24:38,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:38,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:39,767 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:39,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262128640] [2020-12-22 04:24:39,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403008831] [2020-12-22 04:24:39,768 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 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 [2020-12-22 04:24:39,843 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:24:39,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:24:39,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 83 conjunts are in the unsatisfiable core [2020-12-22 04:24:39,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:39,992 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:39,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:39,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2020-12-22 04:24:39,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366810395] [2020-12-22 04:24:39,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-22 04:24:39,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:39,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-22 04:24:39,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 04:24:39,994 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 44 states. [2020-12-22 04:24:41,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:41,223 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2020-12-22 04:24:41,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-22 04:24:41,224 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 46 [2020-12-22 04:24:41,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:41,225 INFO L225 Difference]: With dead ends: 52 [2020-12-22 04:24:41,225 INFO L226 Difference]: Without dead ends: 48 [2020-12-22 04:24:41,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 04:24:41,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-22 04:24:41,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-12-22 04:24:41,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-22 04:24:41,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-12-22 04:24:41,232 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2020-12-22 04:24:41,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:41,232 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-12-22 04:24:41,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-22 04:24:41,232 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-12-22 04:24:41,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-22 04:24:41,233 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:41,233 INFO L422 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:41,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:41,434 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:41,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:41,435 INFO L82 PathProgramCache]: Analyzing trace with hash -685738480, now seen corresponding path program 41 times [2020-12-22 04:24:41,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:41,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603770924] [2020-12-22 04:24:41,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:41,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:42,915 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:42,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603770924] [2020-12-22 04:24:42,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225161259] [2020-12-22 04:24:42,916 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 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 [2020-12-22 04:25:22,235 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2020-12-22 04:25:22,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:25:22,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 118 conjunts are in the unsatisfiable core [2020-12-22 04:25:22,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:25:24,014 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:25:24,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:25:24,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2020-12-22 04:25:24,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063014611] [2020-12-22 04:25:24,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-22 04:25:24,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:25:24,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-22 04:25:24,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 04:25:24,017 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 45 states. [2020-12-22 04:25:25,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:25:25,416 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2020-12-22 04:25:25,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-22 04:25:25,417 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 47 [2020-12-22 04:25:25,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:25:25,418 INFO L225 Difference]: With dead ends: 53 [2020-12-22 04:25:25,418 INFO L226 Difference]: Without dead ends: 49 [2020-12-22 04:25:25,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 13 SyntacticMatches, 34 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 04:25:25,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-22 04:25:25,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-12-22 04:25:25,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-22 04:25:25,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2020-12-22 04:25:25,422 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2020-12-22 04:25:25,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:25:25,422 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2020-12-22 04:25:25,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-22 04:25:25,422 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2020-12-22 04:25:25,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 04:25:25,423 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:25:25,423 INFO L422 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1] [2020-12-22 04:25:25,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-12-22 04:25:25,630 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:25:25,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:25:25,630 INFO L82 PathProgramCache]: Analyzing trace with hash 218608971, now seen corresponding path program 42 times [2020-12-22 04:25:25,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:25:25,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091851816] [2020-12-22 04:25:25,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:25:25,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:25:27,074 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:25:27,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091851816] [2020-12-22 04:25:27,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401783757] [2020-12-22 04:25:27,075 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 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 [2020-12-22 04:25:30,110 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2020-12-22 04:25:30,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:25:30,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 116 conjunts are in the unsatisfiable core [2020-12-22 04:25:30,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:25:31,874 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:25:31,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:25:31,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2020-12-22 04:25:31,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986383524] [2020-12-22 04:25:31,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-22 04:25:31,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:25:31,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-22 04:25:31,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1938, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 04:25:31,876 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 46 states. [2020-12-22 04:25:33,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:25:33,343 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-12-22 04:25:33,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-22 04:25:33,344 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 48 [2020-12-22 04:25:33,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:25:33,345 INFO L225 Difference]: With dead ends: 54 [2020-12-22 04:25:33,345 INFO L226 Difference]: Without dead ends: 50 [2020-12-22 04:25:33,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 19 SyntacticMatches, 29 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=132, Invalid=1938, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 04:25:33,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-22 04:25:33,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-12-22 04:25:33,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-22 04:25:33,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2020-12-22 04:25:33,348 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2020-12-22 04:25:33,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:25:33,348 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2020-12-22 04:25:33,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-22 04:25:33,349 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2020-12-22 04:25:33,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-22 04:25:33,349 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:25:33,349 INFO L422 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1] [2020-12-22 04:25:33,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:25:33,555 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:25:33,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:25:33,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1811391120, now seen corresponding path program 43 times [2020-12-22 04:25:33,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:25:33,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083475891] [2020-12-22 04:25:33,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:25:33,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:25:35,231 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:25:35,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083475891] [2020-12-22 04:25:35,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181824873] [2020-12-22 04:25:35,232 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 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 [2020-12-22 04:25:35,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:25:35,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 89 conjunts are in the unsatisfiable core [2020-12-22 04:25:35,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:25:35,452 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:25:35,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:25:35,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2020-12-22 04:25:35,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032960581] [2020-12-22 04:25:35,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-22 04:25:35,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:25:35,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-22 04:25:35,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2027, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 04:25:35,454 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 47 states. [2020-12-22 04:25:36,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:25:36,939 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2020-12-22 04:25:36,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-22 04:25:36,940 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 49 [2020-12-22 04:25:36,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:25:36,940 INFO L225 Difference]: With dead ends: 55 [2020-12-22 04:25:36,940 INFO L226 Difference]: Without dead ends: 51 [2020-12-22 04:25:36,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=135, Invalid=2027, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 04:25:36,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-22 04:25:36,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-12-22 04:25:36,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-22 04:25:36,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2020-12-22 04:25:36,944 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2020-12-22 04:25:36,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:25:36,945 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2020-12-22 04:25:36,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-22 04:25:36,945 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2020-12-22 04:25:36,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 04:25:36,945 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:25:36,945 INFO L422 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1] [2020-12-22 04:25:37,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:25:37,146 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:25:37,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:25:37,147 INFO L82 PathProgramCache]: Analyzing trace with hash -316884501, now seen corresponding path program 44 times [2020-12-22 04:25:37,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:25:37,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647670235] [2020-12-22 04:25:37,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:25:37,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:25:38,989 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:25:38,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647670235] [2020-12-22 04:25:38,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105237334] [2020-12-22 04:25:38,989 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 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 [2020-12-22 04:25:39,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:25:39,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:25:39,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 91 conjunts are in the unsatisfiable core [2020-12-22 04:25:39,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:25:39,240 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:25:39,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:25:39,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2020-12-22 04:25:39,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517759583] [2020-12-22 04:25:39,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-22 04:25:39,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:25:39,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-22 04:25:39,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2118, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 04:25:39,242 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 48 states. [2020-12-22 04:25:40,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:25:40,865 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-12-22 04:25:40,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-22 04:25:40,866 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 50 [2020-12-22 04:25:40,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:25:40,867 INFO L225 Difference]: With dead ends: 56 [2020-12-22 04:25:40,867 INFO L226 Difference]: Without dead ends: 52 [2020-12-22 04:25:40,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=138, Invalid=2118, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 04:25:40,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-22 04:25:40,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-12-22 04:25:40,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-22 04:25:40,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2020-12-22 04:25:40,871 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2020-12-22 04:25:40,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:25:40,871 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2020-12-22 04:25:40,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-22 04:25:40,871 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2020-12-22 04:25:40,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 04:25:40,872 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:25:40,872 INFO L422 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1] [2020-12-22 04:25:41,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-22 04:25:41,077 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:25:41,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:25:41,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1231819568, now seen corresponding path program 45 times [2020-12-22 04:25:41,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:25:41,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40916814] [2020-12-22 04:25:41,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:25:41,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:25:42,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:25:42,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40916814] [2020-12-22 04:25:42,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270538897] [2020-12-22 04:25:42,900 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 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 [2020-12-22 04:25:44,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2020-12-22 04:25:44,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:25:44,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 101 conjunts are in the unsatisfiable core [2020-12-22 04:25:44,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:25:45,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:25:45,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:25:45,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2020-12-22 04:25:45,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906785539] [2020-12-22 04:25:45,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-22 04:25:45,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:25:45,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-22 04:25:45,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 04:25:45,160 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 49 states. [2020-12-22 04:25:46,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:25:46,878 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2020-12-22 04:25:46,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-22 04:25:46,879 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 51 [2020-12-22 04:25:46,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:25:46,880 INFO L225 Difference]: With dead ends: 57 [2020-12-22 04:25:46,880 INFO L226 Difference]: Without dead ends: 53 [2020-12-22 04:25:46,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 43 SyntacticMatches, 8 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 04:25:46,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-22 04:25:46,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-12-22 04:25:46,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-22 04:25:46,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2020-12-22 04:25:46,884 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2020-12-22 04:25:46,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:25:46,884 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2020-12-22 04:25:46,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-22 04:25:46,884 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2020-12-22 04:25:46,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 04:25:46,884 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:25:46,884 INFO L422 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1] [2020-12-22 04:25:47,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-22 04:25:47,085 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:25:47,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:25:47,086 INFO L82 PathProgramCache]: Analyzing trace with hash 469964427, now seen corresponding path program 46 times [2020-12-22 04:25:47,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:25:47,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308284067] [2020-12-22 04:25:47,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:25:47,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:25:49,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:25:49,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308284067] [2020-12-22 04:25:49,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723723695] [2020-12-22 04:25:49,003 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 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 [2020-12-22 04:25:49,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:25:49,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:25:49,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 95 conjunts are in the unsatisfiable core [2020-12-22 04:25:49,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:25:49,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:25:49,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:25:49,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2020-12-22 04:25:49,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882752668] [2020-12-22 04:25:49,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-22 04:25:49,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:25:49,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-22 04:25:49,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=2306, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 04:25:49,257 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 50 states. [2020-12-22 04:25:50,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:25:50,990 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-12-22 04:25:50,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-22 04:25:50,991 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 52 [2020-12-22 04:25:50,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:25:50,991 INFO L225 Difference]: With dead ends: 58 [2020-12-22 04:25:50,992 INFO L226 Difference]: Without dead ends: 54 [2020-12-22 04:25:50,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=144, Invalid=2306, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 04:25:50,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-22 04:25:50,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-12-22 04:25:50,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-22 04:25:50,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2020-12-22 04:25:50,996 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2020-12-22 04:25:50,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:25:50,996 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2020-12-22 04:25:50,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-22 04:25:50,996 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2020-12-22 04:25:50,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 04:25:50,997 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:25:50,997 INFO L422 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1] [2020-12-22 04:25:51,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-22 04:25:51,198 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:25:51,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:25:51,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1685660720, now seen corresponding path program 47 times [2020-12-22 04:25:51,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:25:51,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506610568] [2020-12-22 04:25:51,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:25:51,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:25:53,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:25:53,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506610568] [2020-12-22 04:25:53,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317504297] [2020-12-22 04:25:53,153 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 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 [2020-12-22 04:27:08,266 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2020-12-22 04:27:08,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:08,283 WARN L261 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 139 conjunts are in the unsatisfiable core [2020-12-22 04:27:08,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:10,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:10,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:10,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2020-12-22 04:27:10,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287202901] [2020-12-22 04:27:10,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-22 04:27:10,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:10,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-22 04:27:10,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 04:27:10,584 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 51 states. [2020-12-22 04:27:12,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:12,334 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2020-12-22 04:27:12,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-22 04:27:12,334 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 53 [2020-12-22 04:27:12,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:12,335 INFO L225 Difference]: With dead ends: 59 [2020-12-22 04:27:12,335 INFO L226 Difference]: Without dead ends: 55 [2020-12-22 04:27:12,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 11 SyntacticMatches, 42 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 04:27:12,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-22 04:27:12,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-12-22 04:27:12,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-22 04:27:12,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2020-12-22 04:27:12,339 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2020-12-22 04:27:12,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:12,339 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2020-12-22 04:27:12,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-22 04:27:12,339 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2020-12-22 04:27:12,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 04:27:12,340 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:12,340 INFO L422 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:12,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:12,540 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:12,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:12,541 INFO L82 PathProgramCache]: Analyzing trace with hash 717540139, now seen corresponding path program 48 times [2020-12-22 04:27:12,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:12,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408832967] [2020-12-22 04:27:12,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:12,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:14,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:14,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408832967] [2020-12-22 04:27:14,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665702384] [2020-12-22 04:27:14,652 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 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 [2020-12-22 04:27:23,971 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-12-22 04:27:23,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:23,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 125 conjunts are in the unsatisfiable core [2020-12-22 04:27:23,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:25,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:25,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:25,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2020-12-22 04:27:25,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631028218] [2020-12-22 04:27:25,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-22 04:27:25,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:25,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-22 04:27:25,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2502, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 04:27:25,693 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 52 states. [2020-12-22 04:27:27,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:27,528 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2020-12-22 04:27:27,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-12-22 04:27:27,529 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 54 [2020-12-22 04:27:27,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:27,530 INFO L225 Difference]: With dead ends: 60 [2020-12-22 04:27:27,530 INFO L226 Difference]: Without dead ends: 56 [2020-12-22 04:27:27,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 28 SyntacticMatches, 26 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=150, Invalid=2502, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 04:27:27,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-22 04:27:27,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-12-22 04:27:27,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-22 04:27:27,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2020-12-22 04:27:27,533 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2020-12-22 04:27:27,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:27,534 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2020-12-22 04:27:27,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-22 04:27:27,534 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2020-12-22 04:27:27,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 04:27:27,534 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:27,534 INFO L422 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1]