/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-new/count_by_2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:51:47,255 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:51:47,258 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:51:47,314 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:51:47,314 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:51:47,319 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:51:47,323 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:51:47,329 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:51:47,333 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:51:47,339 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:51:47,343 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:51:47,344 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:51:47,345 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:51:47,348 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:51:47,351 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:51:47,353 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:51:47,354 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:51:47,359 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:51:47,367 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:51:47,374 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:51:47,376 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:51:47,379 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:51:47,380 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:51:47,383 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:51:47,407 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 16:51:47,417 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 16:51:47,418 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 16:51:47,420 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 16:51:47,421 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 16:51:47,422 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 16:51:47,422 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 16:51:47,423 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 16:51:47,430 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 16:51:47,431 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:51:47,432 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:51:47,432 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:51:47,433 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 16:51:47,482 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:51:47,482 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:51:47,487 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:51:47,487 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:51:47,488 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:51:47,489 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:51:47,489 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:51:47,489 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:51:47,490 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:51:47,490 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:51:47,491 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:51:47,492 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:51:47,492 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:51:47,492 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:51:47,493 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:51:47,493 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:51:47,493 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:51:47,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:51:47,494 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:51:47,495 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:51:47,496 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:51:47,501 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:51:47,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:51:47,502 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:51:47,502 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:51:47,502 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-bitabs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:51:47,905 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:51:47,942 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:51:47,945 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:51:47,947 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:51:47,948 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:51:47,949 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-new/count_by_2.i [2021-01-06 16:51:48,049 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a46dc0aee/33ced16a440440c2b196d826472db31e/FLAGc59c3deae [2021-01-06 16:51:48,624 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:51:48,625 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-new/count_by_2.i [2021-01-06 16:51:48,633 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a46dc0aee/33ced16a440440c2b196d826472db31e/FLAGc59c3deae [2021-01-06 16:51:49,019 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a46dc0aee/33ced16a440440c2b196d826472db31e [2021-01-06 16:51:49,022 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:51:49,024 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:51:49,026 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:51:49,026 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:51:49,030 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:51:49,031 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:51:49" (1/1) ... [2021-01-06 16:51:49,032 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25efa617 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:51:49, skipping insertion in model container [2021-01-06 16:51:49,033 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:51:49" (1/1) ... [2021-01-06 16:51:49,041 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:51:49,058 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 16:51:49,221 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-new/count_by_2.i[891,904] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 16:51:49,231 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:51:49,240 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 16:51:49,254 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-new/count_by_2.i[891,904] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 16:51:49,257 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:51:49,273 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:51:49,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:51:49 WrapperNode [2021-01-06 16:51:49,274 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:51:49,275 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:51:49,275 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:51:49,275 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:51:49,282 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:51:49" (1/1) ... [2021-01-06 16:51:49,289 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:51:49" (1/1) ... [2021-01-06 16:51:49,309 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:51:49,310 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:51:49,310 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:51:49,310 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:51:49,320 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:51:49" (1/1) ... [2021-01-06 16:51:49,321 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:51:49" (1/1) ... [2021-01-06 16:51:49,322 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:51:49" (1/1) ... [2021-01-06 16:51:49,322 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:51:49" (1/1) ... [2021-01-06 16:51:49,325 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:51:49" (1/1) ... [2021-01-06 16:51:49,330 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:51:49" (1/1) ... [2021-01-06 16:51:49,331 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:51:49" (1/1) ... [2021-01-06 16:51:49,333 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:51:49,334 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:51:49,334 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:51:49,334 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:51:49,335 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:51:49" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 16:51:49,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:51:49,434 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:51:49,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:51:49,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:51:49,619 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:51:49,619 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-01-06 16:51:49,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:51:49 BoogieIcfgContainer [2021-01-06 16:51:49,621 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:51:49,623 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:51:49,623 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:51:49,627 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:51:49,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:51:49" (1/3) ... [2021-01-06 16:51:49,628 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f88d53f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:51:49, skipping insertion in model container [2021-01-06 16:51:49,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:51:49" (2/3) ... [2021-01-06 16:51:49,629 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f88d53f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:51:49, skipping insertion in model container [2021-01-06 16:51:49,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:51:49" (3/3) ... [2021-01-06 16:51:49,631 INFO L111 eAbstractionObserver]: Analyzing ICFG count_by_2.i [2021-01-06 16:51:49,638 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:51:49,643 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 16:51:49,662 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 16:51:49,701 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:51:49,701 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:51:49,702 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:51:49,702 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:51:49,702 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:51:49,702 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:51:49,702 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:51:49,702 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:51:49,717 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2021-01-06 16:51:49,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 16:51:49,723 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:49,724 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 16:51:49,725 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:49,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:49,732 INFO L82 PathProgramCache]: Analyzing trace with hash 889605037, now seen corresponding path program 1 times [2021-01-06 16:51:49,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:49,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287389835] [2021-01-06 16:51:49,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:49,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:49,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:49,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287389835] [2021-01-06 16:51:49,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:51:49,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 16:51:49,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319986606] [2021-01-06 16:51:49,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 16:51:49,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:49,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 16:51:49,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:51:49,971 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 3 states. [2021-01-06 16:51:50,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:50,002 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2021-01-06 16:51:50,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 16:51:50,004 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2021-01-06 16:51:50,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:50,014 INFO L225 Difference]: With dead ends: 22 [2021-01-06 16:51:50,014 INFO L226 Difference]: Without dead ends: 10 [2021-01-06 16:51:50,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:51:50,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-01-06 16:51:50,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2021-01-06 16:51:50,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-01-06 16:51:50,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-01-06 16:51:50,059 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2021-01-06 16:51:50,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:50,060 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-01-06 16:51:50,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 16:51:50,061 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-01-06 16:51:50,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 16:51:50,061 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:50,062 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:50,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:51:50,062 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:50,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:50,064 INFO L82 PathProgramCache]: Analyzing trace with hash 265180975, now seen corresponding path program 1 times [2021-01-06 16:51:50,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:50,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639617056] [2021-01-06 16:51:50,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:50,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:50,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:50,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639617056] [2021-01-06 16:51:50,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868155804] [2021-01-06 16:51:50,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 16:51:50,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:50,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 16:51:50,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:50,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:50,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:50,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 16:51:50,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412242618] [2021-01-06 16:51:50,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 16:51:50,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:50,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 16:51:50,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:51:50,273 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2021-01-06 16:51:50,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:50,295 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2021-01-06 16:51:50,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 16:51:50,295 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2021-01-06 16:51:50,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:50,296 INFO L225 Difference]: With dead ends: 16 [2021-01-06 16:51:50,296 INFO L226 Difference]: Without dead ends: 12 [2021-01-06 16:51:50,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:51:50,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-01-06 16:51:50,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2021-01-06 16:51:50,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-01-06 16:51:50,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2021-01-06 16:51:50,301 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2021-01-06 16:51:50,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:50,301 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2021-01-06 16:51:50,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 16:51:50,302 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2021-01-06 16:51:50,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 16:51:50,302 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:50,302 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:50,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 16:51:50,517 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:50,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:50,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1489078833, now seen corresponding path program 2 times [2021-01-06 16:51:50,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:50,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82397664] [2021-01-06 16:51:50,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:50,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:50,573 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:50,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82397664] [2021-01-06 16:51:50,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563958600] [2021-01-06 16:51:50,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 16:51:50,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:51:50,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:50,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 16:51:50,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:50,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:50,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:50,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 16:51:50,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146123453] [2021-01-06 16:51:50,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 16:51:50,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:50,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 16:51:50,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 16:51:50,650 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2021-01-06 16:51:50,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:50,674 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2021-01-06 16:51:50,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 16:51:50,675 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2021-01-06 16:51:50,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:50,676 INFO L225 Difference]: With dead ends: 18 [2021-01-06 16:51:50,676 INFO L226 Difference]: Without dead ends: 14 [2021-01-06 16:51:50,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 16:51:50,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-01-06 16:51:50,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2021-01-06 16:51:50,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-01-06 16:51:50,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-01-06 16:51:50,680 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2021-01-06 16:51:50,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:50,681 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-01-06 16:51:50,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 16:51:50,681 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-01-06 16:51:50,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 16:51:50,682 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:50,682 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:50,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:50,898 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:50,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:50,900 INFO L82 PathProgramCache]: Analyzing trace with hash 833881267, now seen corresponding path program 3 times [2021-01-06 16:51:50,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:50,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053903781] [2021-01-06 16:51:50,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:50,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:50,994 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:50,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053903781] [2021-01-06 16:51:50,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439362332] [2021-01-06 16:51:50,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 16:51:51,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 16:51:51,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:51,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 16:51:51,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:51,110 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:51,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:51,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 16:51:51,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330003413] [2021-01-06 16:51:51,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 16:51:51,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:51,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 16:51:51,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:51:51,116 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2021-01-06 16:51:51,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:51,162 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2021-01-06 16:51:51,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 16:51:51,164 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2021-01-06 16:51:51,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:51,165 INFO L225 Difference]: With dead ends: 20 [2021-01-06 16:51:51,165 INFO L226 Difference]: Without dead ends: 16 [2021-01-06 16:51:51,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:51:51,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-01-06 16:51:51,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2021-01-06 16:51:51,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-01-06 16:51:51,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-01-06 16:51:51,172 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2021-01-06 16:51:51,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:51,177 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-01-06 16:51:51,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 16:51:51,177 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-01-06 16:51:51,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 16:51:51,178 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:51,178 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:51,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:51,394 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:51,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:51,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1745754443, now seen corresponding path program 4 times [2021-01-06 16:51:51,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:51,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83511062] [2021-01-06 16:51:51,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:51,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:51,477 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:51,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83511062] [2021-01-06 16:51:51,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869975892] [2021-01-06 16:51:51,478 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 16:51:51,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:51:51,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:51,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 16:51:51,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:51,607 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:51,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:51,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 16:51:51,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766859865] [2021-01-06 16:51:51,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 16:51:51,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:51,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 16:51:51,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 16:51:51,615 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2021-01-06 16:51:51,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:51,661 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2021-01-06 16:51:51,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 16:51:51,662 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2021-01-06 16:51:51,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:51,666 INFO L225 Difference]: With dead ends: 22 [2021-01-06 16:51:51,666 INFO L226 Difference]: Without dead ends: 18 [2021-01-06 16:51:51,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 16:51:51,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-01-06 16:51:51,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-01-06 16:51:51,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 16:51:51,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-01-06 16:51:51,679 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2021-01-06 16:51:51,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:51,680 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-01-06 16:51:51,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 16:51:51,680 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-01-06 16:51:51,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 16:51:51,683 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:51,683 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:51,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:51,898 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:51,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:51,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1715425335, now seen corresponding path program 5 times [2021-01-06 16:51:51,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:51,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278003125] [2021-01-06 16:51:51,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:51,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:51,979 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:51,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278003125] [2021-01-06 16:51:51,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353957027] [2021-01-06 16:51:51,980 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 16:51:52,024 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 16:51:52,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:52,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 16:51:52,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:52,108 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:52,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:52,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 16:51:52,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331971700] [2021-01-06 16:51:52,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 16:51:52,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:52,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 16:51:52,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:51:52,114 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2021-01-06 16:51:52,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:52,156 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2021-01-06 16:51:52,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 16:51:52,157 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2021-01-06 16:51:52,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:52,158 INFO L225 Difference]: With dead ends: 24 [2021-01-06 16:51:52,158 INFO L226 Difference]: Without dead ends: 20 [2021-01-06 16:51:52,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:51:52,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-01-06 16:51:52,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-01-06 16:51:52,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 16:51:52,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2021-01-06 16:51:52,169 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2021-01-06 16:51:52,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:52,169 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2021-01-06 16:51:52,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 16:51:52,170 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2021-01-06 16:51:52,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 16:51:52,170 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:52,170 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:52,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 16:51:52,371 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:52,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:52,372 INFO L82 PathProgramCache]: Analyzing trace with hash -690462407, now seen corresponding path program 6 times [2021-01-06 16:51:52,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:52,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318718507] [2021-01-06 16:51:52,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:52,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:52,470 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:52,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318718507] [2021-01-06 16:51:52,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524326209] [2021-01-06 16:51:52,471 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 16:51:52,512 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 16:51:52,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:52,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 16:51:52,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:52,560 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:52,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:52,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 16:51:52,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446296733] [2021-01-06 16:51:52,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 16:51:52,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:52,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 16:51:52,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:51:52,565 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2021-01-06 16:51:52,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:52,608 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-01-06 16:51:52,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 16:51:52,608 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2021-01-06 16:51:52,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:52,609 INFO L225 Difference]: With dead ends: 26 [2021-01-06 16:51:52,609 INFO L226 Difference]: Without dead ends: 22 [2021-01-06 16:51:52,610 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:51:52,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-01-06 16:51:52,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-01-06 16:51:52,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-01-06 16:51:52,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2021-01-06 16:51:52,614 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2021-01-06 16:51:52,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:52,614 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2021-01-06 16:51:52,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 16:51:52,615 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2021-01-06 16:51:52,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 16:51:52,615 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:52,615 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:52,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:52,829 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:52,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:52,830 INFO L82 PathProgramCache]: Analyzing trace with hash -2056177221, now seen corresponding path program 7 times [2021-01-06 16:51:52,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:52,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811062703] [2021-01-06 16:51:52,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:52,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:52,914 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:52,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811062703] [2021-01-06 16:51:52,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982982725] [2021-01-06 16:51:52,916 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 16:51:52,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:52,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 16:51:52,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:53,068 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:53,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:53,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 16:51:53,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528292369] [2021-01-06 16:51:53,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 16:51:53,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:53,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 16:51:53,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:51:53,071 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2021-01-06 16:51:53,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:53,120 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2021-01-06 16:51:53,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 16:51:53,121 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2021-01-06 16:51:53,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:53,124 INFO L225 Difference]: With dead ends: 28 [2021-01-06 16:51:53,125 INFO L226 Difference]: Without dead ends: 24 [2021-01-06 16:51:53,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:51:53,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-01-06 16:51:53,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-01-06 16:51:53,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 16:51:53,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2021-01-06 16:51:53,141 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2021-01-06 16:51:53,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:53,141 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2021-01-06 16:51:53,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 16:51:53,142 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2021-01-06 16:51:53,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 16:51:53,143 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:53,144 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:53,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:53,358 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:53,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:53,359 INFO L82 PathProgramCache]: Analyzing trace with hash -248120899, now seen corresponding path program 8 times [2021-01-06 16:51:53,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:53,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768029944] [2021-01-06 16:51:53,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:53,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:53,454 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:53,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768029944] [2021-01-06 16:51:53,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122280763] [2021-01-06 16:51:53,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 16:51:53,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:51:53,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:53,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 16:51:53,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:53,647 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:53,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:53,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 16:51:53,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230765824] [2021-01-06 16:51:53,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 16:51:53,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:53,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 16:51:53,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 16:51:53,650 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2021-01-06 16:51:53,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:53,719 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2021-01-06 16:51:53,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 16:51:53,720 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2021-01-06 16:51:53,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:53,721 INFO L225 Difference]: With dead ends: 30 [2021-01-06 16:51:53,721 INFO L226 Difference]: Without dead ends: 26 [2021-01-06 16:51:53,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 16:51:53,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-01-06 16:51:53,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-01-06 16:51:53,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 16:51:53,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2021-01-06 16:51:53,726 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2021-01-06 16:51:53,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:53,726 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2021-01-06 16:51:53,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 16:51:53,727 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2021-01-06 16:51:53,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 16:51:53,727 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:53,727 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:53,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 16:51:53,941 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:53,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:53,943 INFO L82 PathProgramCache]: Analyzing trace with hash 2127216959, now seen corresponding path program 9 times [2021-01-06 16:51:53,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:53,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159810139] [2021-01-06 16:51:53,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:53,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:54,063 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:54,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159810139] [2021-01-06 16:51:54,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777283207] [2021-01-06 16:51:54,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 16:51:54,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-01-06 16:51:54,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:54,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 16:51:54,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:54,174 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:54,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:54,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 16:51:54,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309643098] [2021-01-06 16:51:54,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 16:51:54,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:54,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 16:51:54,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:51:54,177 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2021-01-06 16:51:54,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:54,231 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2021-01-06 16:51:54,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 16:51:54,232 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2021-01-06 16:51:54,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:54,233 INFO L225 Difference]: With dead ends: 32 [2021-01-06 16:51:54,233 INFO L226 Difference]: Without dead ends: 28 [2021-01-06 16:51:54,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:51:54,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-06 16:51:54,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-01-06 16:51:54,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 16:51:54,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-01-06 16:51:54,238 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2021-01-06 16:51:54,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:54,238 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-01-06 16:51:54,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 16:51:54,239 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-01-06 16:51:54,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 16:51:54,239 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:54,239 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:54,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:54,453 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:54,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:54,454 INFO L82 PathProgramCache]: Analyzing trace with hash -95702975, now seen corresponding path program 10 times [2021-01-06 16:51:54,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:54,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894855887] [2021-01-06 16:51:54,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:54,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:54,577 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:54,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894855887] [2021-01-06 16:51:54,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019342569] [2021-01-06 16:51:54,578 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 16:51:54,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:51:54,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:54,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 16:51:54,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:54,692 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:54,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:54,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 16:51:54,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016429480] [2021-01-06 16:51:54,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 16:51:54,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:54,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 16:51:54,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 16:51:54,695 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2021-01-06 16:51:54,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:54,750 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2021-01-06 16:51:54,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 16:51:54,751 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2021-01-06 16:51:54,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:54,751 INFO L225 Difference]: With dead ends: 34 [2021-01-06 16:51:54,751 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 16:51:54,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 16:51:54,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 16:51:54,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2021-01-06 16:51:54,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 16:51:54,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2021-01-06 16:51:54,756 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2021-01-06 16:51:54,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:54,756 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2021-01-06 16:51:54,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 16:51:54,757 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2021-01-06 16:51:54,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 16:51:54,757 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:54,757 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:54,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:54,972 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:54,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:54,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1723013437, now seen corresponding path program 11 times [2021-01-06 16:51:54,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:54,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487523508] [2021-01-06 16:51:54,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:54,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:55,158 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:55,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487523508] [2021-01-06 16:51:55,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466545287] [2021-01-06 16:51:55,159 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 16:51:55,216 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-01-06 16:51:55,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:55,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 16:51:55,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:55,272 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:55,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:55,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 16:51:55,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853647114] [2021-01-06 16:51:55,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 16:51:55,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:55,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 16:51:55,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 16:51:55,275 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2021-01-06 16:51:55,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:55,333 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2021-01-06 16:51:55,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 16:51:55,334 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2021-01-06 16:51:55,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:55,335 INFO L225 Difference]: With dead ends: 36 [2021-01-06 16:51:55,335 INFO L226 Difference]: Without dead ends: 32 [2021-01-06 16:51:55,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 16:51:55,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-01-06 16:51:55,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2021-01-06 16:51:55,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 16:51:55,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2021-01-06 16:51:55,340 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2021-01-06 16:51:55,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:55,340 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2021-01-06 16:51:55,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 16:51:55,340 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2021-01-06 16:51:55,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-01-06 16:51:55,341 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:55,341 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:55,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 16:51:55,555 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:55,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:55,556 INFO L82 PathProgramCache]: Analyzing trace with hash 2094695621, now seen corresponding path program 12 times [2021-01-06 16:51:55,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:55,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891933490] [2021-01-06 16:51:55,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:55,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:55,734 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:55,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891933490] [2021-01-06 16:51:55,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625538581] [2021-01-06 16:51:55,735 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 16:51:55,782 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-01-06 16:51:55,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:55,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 16:51:55,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:55,849 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:55,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:55,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 16:51:55,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289726649] [2021-01-06 16:51:55,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 16:51:55,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:55,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 16:51:55,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 16:51:55,852 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 16 states. [2021-01-06 16:51:55,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:55,920 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2021-01-06 16:51:55,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 16:51:55,920 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2021-01-06 16:51:55,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:55,925 INFO L225 Difference]: With dead ends: 38 [2021-01-06 16:51:55,925 INFO L226 Difference]: Without dead ends: 34 [2021-01-06 16:51:55,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 16:51:55,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-01-06 16:51:55,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-01-06 16:51:55,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 16:51:55,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2021-01-06 16:51:55,933 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2021-01-06 16:51:55,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:55,933 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2021-01-06 16:51:55,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 16:51:55,933 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2021-01-06 16:51:55,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-06 16:51:55,934 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:55,934 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:56,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 16:51:56,144 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:56,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:56,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1283937721, now seen corresponding path program 13 times [2021-01-06 16:51:56,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:56,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722485868] [2021-01-06 16:51:56,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:56,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:56,337 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:56,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722485868] [2021-01-06 16:51:56,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294595191] [2021-01-06 16:51:56,338 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 16:51:56,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:56,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 16:51:56,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:56,479 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:56,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:56,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 16:51:56,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957698955] [2021-01-06 16:51:56,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 16:51:56,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:56,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 16:51:56,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 16:51:56,482 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 17 states. [2021-01-06 16:51:56,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:56,541 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2021-01-06 16:51:56,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 16:51:56,541 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2021-01-06 16:51:56,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:56,542 INFO L225 Difference]: With dead ends: 40 [2021-01-06 16:51:56,542 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 16:51:56,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 16:51:56,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 16:51:56,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-01-06 16:51:56,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 16:51:56,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2021-01-06 16:51:56,547 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2021-01-06 16:51:56,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:56,547 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2021-01-06 16:51:56,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 16:51:56,548 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2021-01-06 16:51:56,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 16:51:56,548 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:56,549 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:56,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 16:51:56,763 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:56,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:56,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1155303607, now seen corresponding path program 14 times [2021-01-06 16:51:56,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:56,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378623373] [2021-01-06 16:51:56,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:56,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:56,934 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:56,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378623373] [2021-01-06 16:51:56,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913170745] [2021-01-06 16:51:56,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 16:51:56,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:51:56,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:56,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 16:51:56,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:57,067 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:57,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:57,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 16:51:57,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541730405] [2021-01-06 16:51:57,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 16:51:57,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:57,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 16:51:57,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 16:51:57,069 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 18 states. [2021-01-06 16:51:57,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:57,140 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2021-01-06 16:51:57,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 16:51:57,141 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2021-01-06 16:51:57,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:57,142 INFO L225 Difference]: With dead ends: 42 [2021-01-06 16:51:57,142 INFO L226 Difference]: Without dead ends: 38 [2021-01-06 16:51:57,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 16:51:57,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-01-06 16:51:57,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2021-01-06 16:51:57,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 16:51:57,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2021-01-06 16:51:57,146 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2021-01-06 16:51:57,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:57,147 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2021-01-06 16:51:57,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 16:51:57,147 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2021-01-06 16:51:57,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 16:51:57,148 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:57,148 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:57,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:57,362 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:57,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:57,363 INFO L82 PathProgramCache]: Analyzing trace with hash -2091971637, now seen corresponding path program 15 times [2021-01-06 16:51:57,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:57,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157760481] [2021-01-06 16:51:57,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:57,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:57,570 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:57,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157760481] [2021-01-06 16:51:57,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140596759] [2021-01-06 16:51:57,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 16:51:57,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-01-06 16:51:57,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:57,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 16:51:57,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:57,694 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:57,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:57,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 16:51:57,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486388762] [2021-01-06 16:51:57,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 16:51:57,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:57,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 16:51:57,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 16:51:57,696 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 19 states. [2021-01-06 16:51:57,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:57,755 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2021-01-06 16:51:57,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 16:51:57,756 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2021-01-06 16:51:57,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:57,757 INFO L225 Difference]: With dead ends: 44 [2021-01-06 16:51:57,757 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 16:51:57,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 16:51:57,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 16:51:57,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-01-06 16:51:57,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 16:51:57,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2021-01-06 16:51:57,762 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2021-01-06 16:51:57,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:57,762 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2021-01-06 16:51:57,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 16:51:57,762 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2021-01-06 16:51:57,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-06 16:51:57,763 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:57,763 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:57,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 16:51:57,978 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:57,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:57,979 INFO L82 PathProgramCache]: Analyzing trace with hash -286816307, now seen corresponding path program 16 times [2021-01-06 16:51:57,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:57,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360390649] [2021-01-06 16:51:57,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:57,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:58,203 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:58,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360390649] [2021-01-06 16:51:58,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134671777] [2021-01-06 16:51:58,204 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 16:51:58,258 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:51:58,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:58,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 16:51:58,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:58,358 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:58,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:58,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 16:51:58,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136824343] [2021-01-06 16:51:58,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 16:51:58,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:58,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 16:51:58,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 16:51:58,363 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 20 states. [2021-01-06 16:51:58,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:58,447 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2021-01-06 16:51:58,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 16:51:58,447 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2021-01-06 16:51:58,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:58,448 INFO L225 Difference]: With dead ends: 46 [2021-01-06 16:51:58,448 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 16:51:58,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 16:51:58,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 16:51:58,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-01-06 16:51:58,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-01-06 16:51:58,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2021-01-06 16:51:58,457 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2021-01-06 16:51:58,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:58,457 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2021-01-06 16:51:58,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 16:51:58,458 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2021-01-06 16:51:58,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 16:51:58,463 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:58,463 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:58,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 16:51:58,677 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:58,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:58,678 INFO L82 PathProgramCache]: Analyzing trace with hash -699331761, now seen corresponding path program 17 times [2021-01-06 16:51:58,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:58,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611783688] [2021-01-06 16:51:58,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:58,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:58,920 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:58,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611783688] [2021-01-06 16:51:58,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057854657] [2021-01-06 16:51:58,921 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 16:51:58,959 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-01-06 16:51:58,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:58,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 16:51:58,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:59,059 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:59,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:59,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-01-06 16:51:59,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612607052] [2021-01-06 16:51:59,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 16:51:59,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:59,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 16:51:59,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 16:51:59,062 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 21 states. [2021-01-06 16:51:59,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:59,146 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2021-01-06 16:51:59,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 16:51:59,147 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2021-01-06 16:51:59,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:59,147 INFO L225 Difference]: With dead ends: 48 [2021-01-06 16:51:59,147 INFO L226 Difference]: Without dead ends: 44 [2021-01-06 16:51:59,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 16:51:59,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-01-06 16:51:59,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2021-01-06 16:51:59,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-01-06 16:51:59,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2021-01-06 16:51:59,151 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2021-01-06 16:51:59,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:59,152 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2021-01-06 16:51:59,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 16:51:59,152 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2021-01-06 16:51:59,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 16:51:59,153 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:59,153 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:59,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 16:51:59,368 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:59,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:59,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1989691823, now seen corresponding path program 18 times [2021-01-06 16:51:59,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:59,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274141732] [2021-01-06 16:51:59,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:59,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:59,637 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:59,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274141732] [2021-01-06 16:51:59,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783750126] [2021-01-06 16:51:59,638 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 16:51:59,693 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-01-06 16:51:59,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:59,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 16:51:59,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:59,770 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:59,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:59,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-01-06 16:51:59,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830704851] [2021-01-06 16:51:59,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 16:51:59,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:59,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 16:51:59,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 16:51:59,772 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 22 states. [2021-01-06 16:51:59,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:59,826 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2021-01-06 16:51:59,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 16:51:59,827 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2021-01-06 16:51:59,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:59,827 INFO L225 Difference]: With dead ends: 50 [2021-01-06 16:51:59,827 INFO L226 Difference]: Without dead ends: 46 [2021-01-06 16:51:59,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 16:51:59,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-01-06 16:51:59,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-01-06 16:51:59,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-01-06 16:51:59,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2021-01-06 16:51:59,832 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2021-01-06 16:51:59,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:59,832 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2021-01-06 16:51:59,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 16:51:59,833 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2021-01-06 16:51:59,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-01-06 16:51:59,833 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:59,833 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:00,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:00,050 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:00,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:00,050 INFO L82 PathProgramCache]: Analyzing trace with hash -780162861, now seen corresponding path program 19 times [2021-01-06 16:52:00,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:00,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819666788] [2021-01-06 16:52:00,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:00,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:00,375 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:00,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819666788] [2021-01-06 16:52:00,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138834854] [2021-01-06 16:52:00,376 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 16:52:00,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:00,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 16:52:00,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:00,499 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:00,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:00,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-01-06 16:52:00,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540195627] [2021-01-06 16:52:00,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 16:52:00,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:00,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 16:52:00,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 16:52:00,501 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 23 states. [2021-01-06 16:52:00,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:00,579 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2021-01-06 16:52:00,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 16:52:00,579 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2021-01-06 16:52:00,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:00,580 INFO L225 Difference]: With dead ends: 52 [2021-01-06 16:52:00,580 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 16:52:00,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 16:52:00,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 16:52:00,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2021-01-06 16:52:00,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-01-06 16:52:00,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2021-01-06 16:52:00,585 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2021-01-06 16:52:00,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:00,585 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2021-01-06 16:52:00,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 16:52:00,585 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2021-01-06 16:52:00,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 16:52:00,586 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:00,586 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:00,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:00,802 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:00,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:00,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1935999701, now seen corresponding path program 20 times [2021-01-06 16:52:00,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:00,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983440219] [2021-01-06 16:52:00,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:00,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:01,094 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:01,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983440219] [2021-01-06 16:52:01,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034087741] [2021-01-06 16:52:01,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 16:52:01,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:52:01,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:01,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 16:52:01,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:01,222 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:01,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:01,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-01-06 16:52:01,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613983587] [2021-01-06 16:52:01,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 16:52:01,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:01,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 16:52:01,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 16:52:01,227 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 24 states. [2021-01-06 16:52:01,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:01,311 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2021-01-06 16:52:01,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 16:52:01,312 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2021-01-06 16:52:01,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:01,312 INFO L225 Difference]: With dead ends: 54 [2021-01-06 16:52:01,313 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 16:52:01,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 16:52:01,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 16:52:01,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2021-01-06 16:52:01,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-01-06 16:52:01,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2021-01-06 16:52:01,319 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2021-01-06 16:52:01,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:01,320 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2021-01-06 16:52:01,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 16:52:01,320 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2021-01-06 16:52:01,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-06 16:52:01,320 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:01,321 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:01,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-06 16:52:01,535 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:01,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:01,536 INFO L82 PathProgramCache]: Analyzing trace with hash 828105815, now seen corresponding path program 21 times [2021-01-06 16:52:01,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:01,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914860473] [2021-01-06 16:52:01,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:01,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:01,909 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:01,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914860473] [2021-01-06 16:52:01,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820589533] [2021-01-06 16:52:01,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 16:52:01,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-01-06 16:52:01,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:01,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 16:52:01,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:02,034 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:02,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:02,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-01-06 16:52:02,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045379895] [2021-01-06 16:52:02,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 16:52:02,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:02,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 16:52:02,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-01-06 16:52:02,036 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 25 states. [2021-01-06 16:52:02,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:02,121 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2021-01-06 16:52:02,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 16:52:02,123 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2021-01-06 16:52:02,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:02,124 INFO L225 Difference]: With dead ends: 56 [2021-01-06 16:52:02,124 INFO L226 Difference]: Without dead ends: 52 [2021-01-06 16:52:02,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-01-06 16:52:02,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-06 16:52:02,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2021-01-06 16:52:02,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-01-06 16:52:02,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2021-01-06 16:52:02,128 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2021-01-06 16:52:02,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:02,128 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2021-01-06 16:52:02,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 16:52:02,129 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2021-01-06 16:52:02,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-01-06 16:52:02,129 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:02,129 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:02,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 16:52:02,343 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:02,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:02,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1293970777, now seen corresponding path program 22 times [2021-01-06 16:52:02,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:02,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481813925] [2021-01-06 16:52:02,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:02,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:02,792 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:02,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481813925] [2021-01-06 16:52:02,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944811378] [2021-01-06 16:52:02,792 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 16:52:02,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:52:02,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:02,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 16:52:02,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:02,915 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:02,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:02,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-01-06 16:52:02,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763941203] [2021-01-06 16:52:02,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 16:52:02,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:02,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 16:52:02,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-01-06 16:52:02,919 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 26 states. [2021-01-06 16:52:03,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:03,009 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2021-01-06 16:52:03,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 16:52:03,010 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2021-01-06 16:52:03,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:03,011 INFO L225 Difference]: With dead ends: 58 [2021-01-06 16:52:03,011 INFO L226 Difference]: Without dead ends: 54 [2021-01-06 16:52:03,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-01-06 16:52:03,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-01-06 16:52:03,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-01-06 16:52:03,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-01-06 16:52:03,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2021-01-06 16:52:03,019 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2021-01-06 16:52:03,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:03,019 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2021-01-06 16:52:03,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 16:52:03,019 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2021-01-06 16:52:03,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-01-06 16:52:03,020 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:03,020 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:03,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:03,234 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:03,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:03,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1981366821, now seen corresponding path program 23 times [2021-01-06 16:52:03,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:03,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428031891] [2021-01-06 16:52:03,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:03,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:03,663 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:03,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428031891] [2021-01-06 16:52:03,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266661661] [2021-01-06 16:52:03,664 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 16:52:03,705 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-01-06 16:52:03,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:03,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 16:52:03,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:03,783 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:03,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:03,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-01-06 16:52:03,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906088413] [2021-01-06 16:52:03,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 16:52:03,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:03,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 16:52:03,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-01-06 16:52:03,785 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 27 states. [2021-01-06 16:52:03,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:03,884 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2021-01-06 16:52:03,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 16:52:03,885 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2021-01-06 16:52:03,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:03,886 INFO L225 Difference]: With dead ends: 60 [2021-01-06 16:52:03,886 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 16:52:03,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-01-06 16:52:03,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 16:52:03,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-01-06 16:52:03,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2021-01-06 16:52:03,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2021-01-06 16:52:03,890 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2021-01-06 16:52:03,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:03,890 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2021-01-06 16:52:03,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 16:52:03,891 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2021-01-06 16:52:03,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-01-06 16:52:03,891 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:03,891 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:04,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-06 16:52:04,106 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:04,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:04,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1369770531, now seen corresponding path program 24 times [2021-01-06 16:52:04,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:04,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242013035] [2021-01-06 16:52:04,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:04,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:04,585 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:04,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242013035] [2021-01-06 16:52:04,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632850032] [2021-01-06 16:52:04,586 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 16:52:04,646 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-01-06 16:52:04,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:04,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 16:52:04,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:04,725 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:04,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:04,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-01-06 16:52:04,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054571106] [2021-01-06 16:52:04,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 16:52:04,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:04,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 16:52:04,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 16:52:04,731 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 28 states. [2021-01-06 16:52:04,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:04,829 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2021-01-06 16:52:04,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 16:52:04,830 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2021-01-06 16:52:04,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:04,830 INFO L225 Difference]: With dead ends: 62 [2021-01-06 16:52:04,830 INFO L226 Difference]: Without dead ends: 58 [2021-01-06 16:52:04,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 16:52:04,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-01-06 16:52:04,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-01-06 16:52:04,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-01-06 16:52:04,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2021-01-06 16:52:04,836 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2021-01-06 16:52:04,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:04,838 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2021-01-06 16:52:04,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 16:52:04,838 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2021-01-06 16:52:04,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-06 16:52:04,839 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:04,839 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:05,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:05,046 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:05,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:05,046 INFO L82 PathProgramCache]: Analyzing trace with hash -2036255393, now seen corresponding path program 25 times [2021-01-06 16:52:05,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:05,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938984801] [2021-01-06 16:52:05,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:05,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:05,532 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:05,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938984801] [2021-01-06 16:52:05,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969449645] [2021-01-06 16:52:05,533 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 16:52:05,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:05,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 16:52:05,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:05,666 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:05,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:05,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-01-06 16:52:05,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995548278] [2021-01-06 16:52:05,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 16:52:05,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:05,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 16:52:05,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-01-06 16:52:05,669 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 29 states. [2021-01-06 16:52:05,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:05,777 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2021-01-06 16:52:05,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 16:52:05,778 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2021-01-06 16:52:05,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:05,779 INFO L225 Difference]: With dead ends: 64 [2021-01-06 16:52:05,779 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 16:52:05,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-01-06 16:52:05,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 16:52:05,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-01-06 16:52:05,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-01-06 16:52:05,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2021-01-06 16:52:05,782 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2021-01-06 16:52:05,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:05,783 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2021-01-06 16:52:05,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 16:52:05,783 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2021-01-06 16:52:05,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-06 16:52:05,783 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:05,784 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:05,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-06 16:52:05,997 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:05,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:05,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1716886625, now seen corresponding path program 26 times [2021-01-06 16:52:05,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:05,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081664531] [2021-01-06 16:52:05,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:06,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:06,508 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:06,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081664531] [2021-01-06 16:52:06,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946441697] [2021-01-06 16:52:06,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 16:52:06,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:52:06,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:06,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 16:52:06,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:06,638 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:06,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:06,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-01-06 16:52:06,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141633889] [2021-01-06 16:52:06,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-01-06 16:52:06,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:06,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-01-06 16:52:06,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-01-06 16:52:06,640 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 30 states. [2021-01-06 16:52:06,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:06,738 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2021-01-06 16:52:06,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 16:52:06,738 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2021-01-06 16:52:06,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:06,739 INFO L225 Difference]: With dead ends: 66 [2021-01-06 16:52:06,739 INFO L226 Difference]: Without dead ends: 62 [2021-01-06 16:52:06,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-01-06 16:52:06,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-01-06 16:52:06,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-01-06 16:52:06,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2021-01-06 16:52:06,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2021-01-06 16:52:06,742 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2021-01-06 16:52:06,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:06,742 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2021-01-06 16:52:06,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2021-01-06 16:52:06,743 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2021-01-06 16:52:06,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-01-06 16:52:06,743 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:06,743 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:06,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 16:52:06,955 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:06,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:06,955 INFO L82 PathProgramCache]: Analyzing trace with hash 713837283, now seen corresponding path program 27 times [2021-01-06 16:52:06,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:06,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008796686] [2021-01-06 16:52:06,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:06,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:07,512 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:07,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008796686] [2021-01-06 16:52:07,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699378618] [2021-01-06 16:52:07,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 16:52:07,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-01-06 16:52:07,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:07,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 29 conjunts are in the unsatisfiable core [2021-01-06 16:52:07,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:07,656 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:07,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:07,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-01-06 16:52:07,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664693183] [2021-01-06 16:52:07,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 16:52:07,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:07,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 16:52:07,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-01-06 16:52:07,659 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 31 states. [2021-01-06 16:52:07,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:07,763 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2021-01-06 16:52:07,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 16:52:07,763 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2021-01-06 16:52:07,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:07,764 INFO L225 Difference]: With dead ends: 68 [2021-01-06 16:52:07,764 INFO L226 Difference]: Without dead ends: 64 [2021-01-06 16:52:07,765 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-01-06 16:52:07,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-01-06 16:52:07,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-01-06 16:52:07,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-01-06 16:52:07,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2021-01-06 16:52:07,767 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2021-01-06 16:52:07,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:07,768 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2021-01-06 16:52:07,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-01-06 16:52:07,768 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2021-01-06 16:52:07,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-01-06 16:52:07,769 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:07,769 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:07,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 16:52:07,971 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:07,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:07,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1143906075, now seen corresponding path program 28 times [2021-01-06 16:52:07,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:07,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914768242] [2021-01-06 16:52:07,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:07,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:08,518 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:08,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914768242] [2021-01-06 16:52:08,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863204582] [2021-01-06 16:52:08,519 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 16:52:08,565 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:52:08,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:08,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 30 conjunts are in the unsatisfiable core [2021-01-06 16:52:08,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:08,678 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:08,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:08,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-01-06 16:52:08,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310470338] [2021-01-06 16:52:08,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 16:52:08,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:08,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 16:52:08,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-01-06 16:52:08,681 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 32 states. [2021-01-06 16:52:08,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:08,813 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2021-01-06 16:52:08,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 16:52:08,814 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2021-01-06 16:52:08,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:08,818 INFO L225 Difference]: With dead ends: 70 [2021-01-06 16:52:08,819 INFO L226 Difference]: Without dead ends: 66 [2021-01-06 16:52:08,822 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-01-06 16:52:08,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-01-06 16:52:08,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2021-01-06 16:52:08,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-01-06 16:52:08,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2021-01-06 16:52:08,826 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2021-01-06 16:52:08,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:08,826 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2021-01-06 16:52:08,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 16:52:08,826 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2021-01-06 16:52:08,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-01-06 16:52:08,827 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:08,827 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:09,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 16:52:09,031 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:09,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:09,031 INFO L82 PathProgramCache]: Analyzing trace with hash 271122023, now seen corresponding path program 29 times [2021-01-06 16:52:09,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:09,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502566953] [2021-01-06 16:52:09,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:09,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:09,641 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:09,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502566953] [2021-01-06 16:52:09,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768151537] [2021-01-06 16:52:09,642 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 16:52:09,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2021-01-06 16:52:09,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:09,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 16:52:09,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:09,789 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:09,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:09,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-01-06 16:52:09,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58062536] [2021-01-06 16:52:09,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 16:52:09,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:09,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 16:52:09,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 16:52:09,792 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 33 states. [2021-01-06 16:52:09,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:09,923 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2021-01-06 16:52:09,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 16:52:09,924 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2021-01-06 16:52:09,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:09,925 INFO L225 Difference]: With dead ends: 72 [2021-01-06 16:52:09,925 INFO L226 Difference]: Without dead ends: 68 [2021-01-06 16:52:09,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 16:52:09,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-01-06 16:52:09,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2021-01-06 16:52:09,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-01-06 16:52:09,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2021-01-06 16:52:09,928 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2021-01-06 16:52:09,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:09,929 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2021-01-06 16:52:09,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 16:52:09,929 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2021-01-06 16:52:09,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-06 16:52:09,929 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:09,929 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:10,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:10,140 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:10,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:10,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1391508631, now seen corresponding path program 30 times [2021-01-06 16:52:10,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:10,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988702653] [2021-01-06 16:52:10,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:10,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:10,809 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:10,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988702653] [2021-01-06 16:52:10,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729244335] [2021-01-06 16:52:10,810 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 16:52:10,871 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-01-06 16:52:10,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:10,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 32 conjunts are in the unsatisfiable core [2021-01-06 16:52:10,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:10,961 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:10,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:10,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-01-06 16:52:10,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553213046] [2021-01-06 16:52:10,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-01-06 16:52:10,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:10,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-01-06 16:52:10,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 16:52:10,964 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 34 states. [2021-01-06 16:52:11,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:11,099 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2021-01-06 16:52:11,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-06 16:52:11,099 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2021-01-06 16:52:11,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:11,100 INFO L225 Difference]: With dead ends: 74 [2021-01-06 16:52:11,100 INFO L226 Difference]: Without dead ends: 70 [2021-01-06 16:52:11,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 16:52:11,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-01-06 16:52:11,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2021-01-06 16:52:11,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2021-01-06 16:52:11,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2021-01-06 16:52:11,104 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2021-01-06 16:52:11,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:11,105 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2021-01-06 16:52:11,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2021-01-06 16:52:11,105 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2021-01-06 16:52:11,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-01-06 16:52:11,105 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:11,106 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:11,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:11,321 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:11,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:11,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1451733013, now seen corresponding path program 31 times [2021-01-06 16:52:11,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:11,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673947135] [2021-01-06 16:52:11,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:11,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:12,005 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:12,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673947135] [2021-01-06 16:52:12,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441797343] [2021-01-06 16:52:12,006 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 16:52:12,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:12,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-01-06 16:52:12,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:12,140 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:12,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:12,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-01-06 16:52:12,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088961324] [2021-01-06 16:52:12,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-01-06 16:52:12,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:12,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-01-06 16:52:12,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 16:52:12,142 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 35 states. [2021-01-06 16:52:12,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:12,265 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2021-01-06 16:52:12,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 16:52:12,265 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2021-01-06 16:52:12,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:12,266 INFO L225 Difference]: With dead ends: 76 [2021-01-06 16:52:12,266 INFO L226 Difference]: Without dead ends: 72 [2021-01-06 16:52:12,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 16:52:12,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-01-06 16:52:12,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2021-01-06 16:52:12,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2021-01-06 16:52:12,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2021-01-06 16:52:12,273 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2021-01-06 16:52:12,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:12,273 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2021-01-06 16:52:12,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2021-01-06 16:52:12,273 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2021-01-06 16:52:12,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-01-06 16:52:12,274 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:12,274 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:12,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:12,489 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:12,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:12,489 INFO L82 PathProgramCache]: Analyzing trace with hash 802178029, now seen corresponding path program 32 times [2021-01-06 16:52:12,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:12,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848870574] [2021-01-06 16:52:12,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:12,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:13,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:13,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848870574] [2021-01-06 16:52:13,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487228470] [2021-01-06 16:52:13,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 16:52:13,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:52:13,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:13,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 34 conjunts are in the unsatisfiable core [2021-01-06 16:52:13,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:13,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:13,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:13,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-01-06 16:52:13,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294921152] [2021-01-06 16:52:13,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-01-06 16:52:13,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:13,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-01-06 16:52:13,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 16:52:13,299 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 36 states. [2021-01-06 16:52:13,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:13,420 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2021-01-06 16:52:13,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-06 16:52:13,421 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2021-01-06 16:52:13,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:13,422 INFO L225 Difference]: With dead ends: 78 [2021-01-06 16:52:13,422 INFO L226 Difference]: Without dead ends: 74 [2021-01-06 16:52:13,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 16:52:13,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-01-06 16:52:13,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2021-01-06 16:52:13,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-01-06 16:52:13,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2021-01-06 16:52:13,430 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2021-01-06 16:52:13,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:13,430 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2021-01-06 16:52:13,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-01-06 16:52:13,430 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2021-01-06 16:52:13,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-01-06 16:52:13,431 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:13,431 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:13,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-01-06 16:52:13,646 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:13,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:13,647 INFO L82 PathProgramCache]: Analyzing trace with hash 2147172207, now seen corresponding path program 33 times [2021-01-06 16:52:13,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:13,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447421490] [2021-01-06 16:52:13,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:13,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:14,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:14,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447421490] [2021-01-06 16:52:14,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115326905] [2021-01-06 16:52:14,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 16:52:14,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2021-01-06 16:52:14,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:14,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 35 conjunts are in the unsatisfiable core [2021-01-06 16:52:14,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:14,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:14,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:14,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-01-06 16:52:14,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037234723] [2021-01-06 16:52:14,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-01-06 16:52:14,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:14,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-01-06 16:52:14,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 16:52:14,492 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 37 states. [2021-01-06 16:52:14,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:14,653 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2021-01-06 16:52:14,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-06 16:52:14,654 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2021-01-06 16:52:14,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:14,654 INFO L225 Difference]: With dead ends: 80 [2021-01-06 16:52:14,654 INFO L226 Difference]: Without dead ends: 76 [2021-01-06 16:52:14,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 16:52:14,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-01-06 16:52:14,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2021-01-06 16:52:14,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2021-01-06 16:52:14,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2021-01-06 16:52:14,658 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2021-01-06 16:52:14,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:14,659 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2021-01-06 16:52:14,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2021-01-06 16:52:14,659 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2021-01-06 16:52:14,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-01-06 16:52:14,659 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:14,659 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:14,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:14,875 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:14,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:14,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1901421169, now seen corresponding path program 34 times [2021-01-06 16:52:14,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:14,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617771033] [2021-01-06 16:52:14,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:14,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:15,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:15,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617771033] [2021-01-06 16:52:15,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626573435] [2021-01-06 16:52:15,622 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 16:52:15,664 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:52:15,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:15,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 16:52:15,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:15,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:15,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:15,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-01-06 16:52:15,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553895212] [2021-01-06 16:52:15,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-01-06 16:52:15,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:15,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-01-06 16:52:15,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 16:52:15,774 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 38 states. [2021-01-06 16:52:15,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:15,886 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2021-01-06 16:52:15,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-06 16:52:15,887 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2021-01-06 16:52:15,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:15,888 INFO L225 Difference]: With dead ends: 82 [2021-01-06 16:52:15,888 INFO L226 Difference]: Without dead ends: 78 [2021-01-06 16:52:15,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 16:52:15,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-01-06 16:52:15,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2021-01-06 16:52:15,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2021-01-06 16:52:15,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2021-01-06 16:52:15,891 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2021-01-06 16:52:15,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:15,892 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2021-01-06 16:52:15,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2021-01-06 16:52:15,892 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2021-01-06 16:52:15,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-06 16:52:15,892 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:15,893 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:16,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-01-06 16:52:16,108 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:16,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:16,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1957874931, now seen corresponding path program 35 times [2021-01-06 16:52:16,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:16,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471989718] [2021-01-06 16:52:16,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:16,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:16,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:16,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471989718] [2021-01-06 16:52:16,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461952718] [2021-01-06 16:52:16,974 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 16:52:17,029 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2021-01-06 16:52:17,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:17,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 37 conjunts are in the unsatisfiable core [2021-01-06 16:52:17,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:17,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:17,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:17,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-01-06 16:52:17,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096318456] [2021-01-06 16:52:17,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-01-06 16:52:17,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:17,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-01-06 16:52:17,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 16:52:17,128 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 39 states. [2021-01-06 16:52:17,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:17,265 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2021-01-06 16:52:17,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-06 16:52:17,265 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2021-01-06 16:52:17,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:17,266 INFO L225 Difference]: With dead ends: 84 [2021-01-06 16:52:17,266 INFO L226 Difference]: Without dead ends: 80 [2021-01-06 16:52:17,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 16:52:17,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-01-06 16:52:17,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2021-01-06 16:52:17,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-01-06 16:52:17,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2021-01-06 16:52:17,270 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2021-01-06 16:52:17,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:17,271 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2021-01-06 16:52:17,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2021-01-06 16:52:17,271 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2021-01-06 16:52:17,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-01-06 16:52:17,271 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:17,271 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:17,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:17,485 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:17,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:17,485 INFO L82 PathProgramCache]: Analyzing trace with hash 375365365, now seen corresponding path program 36 times [2021-01-06 16:52:17,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:17,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599817622] [2021-01-06 16:52:17,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:17,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:18,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:18,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599817622] [2021-01-06 16:52:18,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687690601] [2021-01-06 16:52:18,392 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 16:52:18,478 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2021-01-06 16:52:18,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:18,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 38 conjunts are in the unsatisfiable core [2021-01-06 16:52:18,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:18,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:18,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:18,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-01-06 16:52:18,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147789936] [2021-01-06 16:52:18,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-01-06 16:52:18,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:18,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-01-06 16:52:18,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 16:52:18,585 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 40 states. [2021-01-06 16:52:18,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:18,736 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2021-01-06 16:52:18,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-06 16:52:18,737 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2021-01-06 16:52:18,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:18,737 INFO L225 Difference]: With dead ends: 86 [2021-01-06 16:52:18,738 INFO L226 Difference]: Without dead ends: 82 [2021-01-06 16:52:18,739 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 16:52:18,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-01-06 16:52:18,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2021-01-06 16:52:18,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2021-01-06 16:52:18,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2021-01-06 16:52:18,742 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2021-01-06 16:52:18,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:18,742 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2021-01-06 16:52:18,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2021-01-06 16:52:18,742 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2021-01-06 16:52:18,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-01-06 16:52:18,743 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:18,743 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:18,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-01-06 16:52:18,957 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:18,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:18,957 INFO L82 PathProgramCache]: Analyzing trace with hash 2095223, now seen corresponding path program 37 times [2021-01-06 16:52:18,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:18,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601374688] [2021-01-06 16:52:18,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:18,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:19,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:19,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601374688] [2021-01-06 16:52:19,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48331780] [2021-01-06 16:52:19,982 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 16:52:20,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:20,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 39 conjunts are in the unsatisfiable core [2021-01-06 16:52:20,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:20,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:20,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:20,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2021-01-06 16:52:20,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26945877] [2021-01-06 16:52:20,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-01-06 16:52:20,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:20,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-01-06 16:52:20,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 16:52:20,136 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 41 states. [2021-01-06 16:52:20,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:20,294 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2021-01-06 16:52:20,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-06 16:52:20,295 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2021-01-06 16:52:20,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:20,296 INFO L225 Difference]: With dead ends: 88 [2021-01-06 16:52:20,296 INFO L226 Difference]: Without dead ends: 84 [2021-01-06 16:52:20,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 16:52:20,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-01-06 16:52:20,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2021-01-06 16:52:20,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2021-01-06 16:52:20,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2021-01-06 16:52:20,302 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2021-01-06 16:52:20,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:20,302 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2021-01-06 16:52:20,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2021-01-06 16:52:20,303 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2021-01-06 16:52:20,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-01-06 16:52:20,303 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:20,303 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:20,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-06 16:52:20,518 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:20,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:20,518 INFO L82 PathProgramCache]: Analyzing trace with hash 2066741625, now seen corresponding path program 38 times [2021-01-06 16:52:20,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:20,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17991580] [2021-01-06 16:52:20,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:20,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:21,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:21,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17991580] [2021-01-06 16:52:21,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972216186] [2021-01-06 16:52:21,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 16:52:21,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:52:21,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:21,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 40 conjunts are in the unsatisfiable core [2021-01-06 16:52:21,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:21,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:21,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:21,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2021-01-06 16:52:21,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108035486] [2021-01-06 16:52:21,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-01-06 16:52:21,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:21,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-01-06 16:52:21,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 16:52:21,670 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 42 states. [2021-01-06 16:52:21,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:21,862 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2021-01-06 16:52:21,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-06 16:52:21,863 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2021-01-06 16:52:21,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:21,864 INFO L225 Difference]: With dead ends: 90 [2021-01-06 16:52:21,864 INFO L226 Difference]: Without dead ends: 86 [2021-01-06 16:52:21,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 16:52:21,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-01-06 16:52:21,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2021-01-06 16:52:21,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2021-01-06 16:52:21,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2021-01-06 16:52:21,868 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2021-01-06 16:52:21,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:21,868 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2021-01-06 16:52:21,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2021-01-06 16:52:21,868 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2021-01-06 16:52:21,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-01-06 16:52:21,869 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:21,869 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:22,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-06 16:52:22,085 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:22,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:22,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1917043195, now seen corresponding path program 39 times [2021-01-06 16:52:22,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:22,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793554840] [2021-01-06 16:52:22,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:22,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:23,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:23,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793554840] [2021-01-06 16:52:23,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822705572] [2021-01-06 16:52:23,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 16:52:23,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2021-01-06 16:52:23,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:23,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 41 conjunts are in the unsatisfiable core [2021-01-06 16:52:23,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:23,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:23,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:23,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2021-01-06 16:52:23,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018081968] [2021-01-06 16:52:23,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-01-06 16:52:23,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:23,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-01-06 16:52:23,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 16:52:23,254 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 43 states. [2021-01-06 16:52:23,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:23,410 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2021-01-06 16:52:23,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-06 16:52:23,411 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2021-01-06 16:52:23,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:23,412 INFO L225 Difference]: With dead ends: 92 [2021-01-06 16:52:23,412 INFO L226 Difference]: Without dead ends: 88 [2021-01-06 16:52:23,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 16:52:23,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-01-06 16:52:23,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2021-01-06 16:52:23,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2021-01-06 16:52:23,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2021-01-06 16:52:23,417 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2021-01-06 16:52:23,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:23,417 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2021-01-06 16:52:23,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2021-01-06 16:52:23,417 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2021-01-06 16:52:23,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-06 16:52:23,418 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:23,418 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:23,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-06 16:52:23,633 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:23,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:23,634 INFO L82 PathProgramCache]: Analyzing trace with hash -209227267, now seen corresponding path program 40 times [2021-01-06 16:52:23,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:23,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177885529] [2021-01-06 16:52:23,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:23,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:24,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:24,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177885529] [2021-01-06 16:52:24,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749782443] [2021-01-06 16:52:24,784 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 16:52:24,826 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:52:24,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:24,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 42 conjunts are in the unsatisfiable core [2021-01-06 16:52:24,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:24,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:24,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:24,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2021-01-06 16:52:24,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000778468] [2021-01-06 16:52:24,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-01-06 16:52:24,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:24,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-01-06 16:52:24,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 16:52:24,966 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 44 states. [2021-01-06 16:52:25,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:25,104 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2021-01-06 16:52:25,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-06 16:52:25,105 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2021-01-06 16:52:25,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:25,105 INFO L225 Difference]: With dead ends: 94 [2021-01-06 16:52:25,106 INFO L226 Difference]: Without dead ends: 90 [2021-01-06 16:52:25,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 16:52:25,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-01-06 16:52:25,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2021-01-06 16:52:25,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2021-01-06 16:52:25,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2021-01-06 16:52:25,109 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2021-01-06 16:52:25,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:25,110 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2021-01-06 16:52:25,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2021-01-06 16:52:25,110 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2021-01-06 16:52:25,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-01-06 16:52:25,110 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:25,110 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:25,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:25,325 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:25,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:25,325 INFO L82 PathProgramCache]: Analyzing trace with hash 849291647, now seen corresponding path program 41 times [2021-01-06 16:52:25,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:25,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581163836] [2021-01-06 16:52:25,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:25,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:26,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:26,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581163836] [2021-01-06 16:52:26,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502114570] [2021-01-06 16:52:26,466 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 16:52:26,528 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2021-01-06 16:52:26,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:26,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 43 conjunts are in the unsatisfiable core [2021-01-06 16:52:26,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:26,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:26,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:26,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2021-01-06 16:52:26,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384938543] [2021-01-06 16:52:26,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-01-06 16:52:26,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:26,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-01-06 16:52:26,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 16:52:26,641 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 45 states. [2021-01-06 16:52:26,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:26,846 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2021-01-06 16:52:26,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-06 16:52:26,846 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2021-01-06 16:52:26,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:26,847 INFO L225 Difference]: With dead ends: 96 [2021-01-06 16:52:26,847 INFO L226 Difference]: Without dead ends: 92 [2021-01-06 16:52:26,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 16:52:26,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-01-06 16:52:26,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2021-01-06 16:52:26,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2021-01-06 16:52:26,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2021-01-06 16:52:26,852 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2021-01-06 16:52:26,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:26,852 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2021-01-06 16:52:26,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2021-01-06 16:52:26,853 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2021-01-06 16:52:26,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-01-06 16:52:26,853 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:26,853 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:27,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-01-06 16:52:27,068 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:27,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:27,069 INFO L82 PathProgramCache]: Analyzing trace with hash 178718849, now seen corresponding path program 42 times [2021-01-06 16:52:27,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:27,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947173251] [2021-01-06 16:52:27,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:27,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:28,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:28,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947173251] [2021-01-06 16:52:28,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172980500] [2021-01-06 16:52:28,287 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 16:52:28,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2021-01-06 16:52:28,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:28,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 44 conjunts are in the unsatisfiable core [2021-01-06 16:52:28,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:28,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:28,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:28,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2021-01-06 16:52:28,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129738376] [2021-01-06 16:52:28,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-01-06 16:52:28,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:28,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-01-06 16:52:28,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 16:52:28,490 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 46 states. [2021-01-06 16:52:28,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:28,676 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2021-01-06 16:52:28,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-01-06 16:52:28,676 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2021-01-06 16:52:28,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:28,677 INFO L225 Difference]: With dead ends: 98 [2021-01-06 16:52:28,677 INFO L226 Difference]: Without dead ends: 94 [2021-01-06 16:52:28,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 16:52:28,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-01-06 16:52:28,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2021-01-06 16:52:28,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2021-01-06 16:52:28,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2021-01-06 16:52:28,681 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2021-01-06 16:52:28,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:28,681 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2021-01-06 16:52:28,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2021-01-06 16:52:28,681 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2021-01-06 16:52:28,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-01-06 16:52:28,682 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:28,682 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:28,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:28,883 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:28,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:28,884 INFO L82 PathProgramCache]: Analyzing trace with hash 3354371, now seen corresponding path program 43 times [2021-01-06 16:52:28,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:28,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045900662] [2021-01-06 16:52:28,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:28,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:30,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:30,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045900662] [2021-01-06 16:52:30,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934067860] [2021-01-06 16:52:30,147 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 16:52:30,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:30,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 45 conjunts are in the unsatisfiable core [2021-01-06 16:52:30,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:30,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:30,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:30,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2021-01-06 16:52:30,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814106106] [2021-01-06 16:52:30,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-01-06 16:52:30,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:30,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-01-06 16:52:30,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 16:52:30,331 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 47 states. [2021-01-06 16:52:30,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:30,498 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2021-01-06 16:52:30,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-01-06 16:52:30,498 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2021-01-06 16:52:30,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:30,499 INFO L225 Difference]: With dead ends: 100 [2021-01-06 16:52:30,499 INFO L226 Difference]: Without dead ends: 96 [2021-01-06 16:52:30,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 16:52:30,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-01-06 16:52:30,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2021-01-06 16:52:30,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2021-01-06 16:52:30,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2021-01-06 16:52:30,503 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2021-01-06 16:52:30,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:30,504 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2021-01-06 16:52:30,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2021-01-06 16:52:30,504 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2021-01-06 16:52:30,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-01-06 16:52:30,504 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:30,505 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:30,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:30,720 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:30,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:30,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1018184443, now seen corresponding path program 44 times [2021-01-06 16:52:30,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:30,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946210792] [2021-01-06 16:52:30,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:30,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:32,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:32,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946210792] [2021-01-06 16:52:32,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355984911] [2021-01-06 16:52:32,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 16:52:32,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:52:32,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:32,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 46 conjunts are in the unsatisfiable core [2021-01-06 16:52:32,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:32,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:32,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:32,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2021-01-06 16:52:32,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381340809] [2021-01-06 16:52:32,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-01-06 16:52:32,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:32,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-01-06 16:52:32,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 16:52:32,234 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 48 states. [2021-01-06 16:52:32,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:32,438 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2021-01-06 16:52:32,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-06 16:52:32,439 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2021-01-06 16:52:32,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:32,439 INFO L225 Difference]: With dead ends: 102 [2021-01-06 16:52:32,440 INFO L226 Difference]: Without dead ends: 98 [2021-01-06 16:52:32,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 16:52:32,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-01-06 16:52:32,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2021-01-06 16:52:32,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2021-01-06 16:52:32,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2021-01-06 16:52:32,444 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2021-01-06 16:52:32,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:32,444 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2021-01-06 16:52:32,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2021-01-06 16:52:32,444 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2021-01-06 16:52:32,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-01-06 16:52:32,445 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:32,445 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:32,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-01-06 16:52:32,659 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:32,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:32,659 INFO L82 PathProgramCache]: Analyzing trace with hash 830526087, now seen corresponding path program 45 times [2021-01-06 16:52:32,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:32,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982746545] [2021-01-06 16:52:32,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:32,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:34,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:34,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982746545] [2021-01-06 16:52:34,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201767317] [2021-01-06 16:52:34,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 16:52:34,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2021-01-06 16:52:34,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:34,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 47 conjunts are in the unsatisfiable core [2021-01-06 16:52:34,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:34,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:34,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:34,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2021-01-06 16:52:34,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372579274] [2021-01-06 16:52:34,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-01-06 16:52:34,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:34,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-01-06 16:52:34,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 16:52:34,206 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 49 states. [2021-01-06 16:52:34,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:34,377 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2021-01-06 16:52:34,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-01-06 16:52:34,378 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2021-01-06 16:52:34,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:34,379 INFO L225 Difference]: With dead ends: 104 [2021-01-06 16:52:34,379 INFO L226 Difference]: Without dead ends: 100 [2021-01-06 16:52:34,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 16:52:34,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-01-06 16:52:34,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2021-01-06 16:52:34,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2021-01-06 16:52:34,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2021-01-06 16:52:34,384 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2021-01-06 16:52:34,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:34,389 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2021-01-06 16:52:34,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2021-01-06 16:52:34,390 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2021-01-06 16:52:34,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-01-06 16:52:34,390 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:34,390 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:34,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-01-06 16:52:34,606 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:34,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:34,606 INFO L82 PathProgramCache]: Analyzing trace with hash -675115127, now seen corresponding path program 46 times [2021-01-06 16:52:34,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:34,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378253718] [2021-01-06 16:52:34,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:34,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:36,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:36,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378253718] [2021-01-06 16:52:36,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360338421] [2021-01-06 16:52:36,091 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 16:52:36,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:52:36,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:36,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 48 conjunts are in the unsatisfiable core [2021-01-06 16:52:36,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:36,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:36,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:36,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2021-01-06 16:52:36,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106327901] [2021-01-06 16:52:36,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-01-06 16:52:36,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:36,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-01-06 16:52:36,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2021-01-06 16:52:36,285 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 50 states. [2021-01-06 16:52:36,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:36,461 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2021-01-06 16:52:36,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-01-06 16:52:36,461 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2021-01-06 16:52:36,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:36,462 INFO L225 Difference]: With dead ends: 106 [2021-01-06 16:52:36,462 INFO L226 Difference]: Without dead ends: 102 [2021-01-06 16:52:36,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2021-01-06 16:52:36,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-01-06 16:52:36,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2021-01-06 16:52:36,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2021-01-06 16:52:36,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2021-01-06 16:52:36,468 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2021-01-06 16:52:36,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:36,469 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2021-01-06 16:52:36,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2021-01-06 16:52:36,469 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2021-01-06 16:52:36,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-01-06 16:52:36,469 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:36,470 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:36,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-01-06 16:52:36,684 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:36,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:36,684 INFO L82 PathProgramCache]: Analyzing trace with hash -192343029, now seen corresponding path program 47 times [2021-01-06 16:52:36,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:36,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172286955] [2021-01-06 16:52:36,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:36,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:38,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:38,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172286955] [2021-01-06 16:52:38,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296883979] [2021-01-06 16:52:38,155 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 16:52:38,224 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2021-01-06 16:52:38,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:38,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 49 conjunts are in the unsatisfiable core [2021-01-06 16:52:38,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:38,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:38,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:38,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2021-01-06 16:52:38,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91754907] [2021-01-06 16:52:38,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-01-06 16:52:38,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:38,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-01-06 16:52:38,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-01-06 16:52:38,354 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 51 states. [2021-01-06 16:52:38,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:38,545 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2021-01-06 16:52:38,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-01-06 16:52:38,546 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2021-01-06 16:52:38,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:38,547 INFO L225 Difference]: With dead ends: 108 [2021-01-06 16:52:38,547 INFO L226 Difference]: Without dead ends: 104 [2021-01-06 16:52:38,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-01-06 16:52:38,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-01-06 16:52:38,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2021-01-06 16:52:38,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2021-01-06 16:52:38,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2021-01-06 16:52:38,551 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2021-01-06 16:52:38,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:38,551 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2021-01-06 16:52:38,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2021-01-06 16:52:38,552 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2021-01-06 16:52:38,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-01-06 16:52:38,552 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:38,552 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:38,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:38,766 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:38,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:38,767 INFO L82 PathProgramCache]: Analyzing trace with hash -104824819, now seen corresponding path program 48 times [2021-01-06 16:52:38,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:38,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847644879] [2021-01-06 16:52:38,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:38,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:40,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:40,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847644879] [2021-01-06 16:52:40,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653534311] [2021-01-06 16:52:40,342 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 16:52:40,425 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2021-01-06 16:52:40,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:40,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 50 conjunts are in the unsatisfiable core [2021-01-06 16:52:40,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:40,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:40,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:40,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2021-01-06 16:52:40,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561044199] [2021-01-06 16:52:40,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-01-06 16:52:40,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:40,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-01-06 16:52:40,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-01-06 16:52:40,551 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 52 states. [2021-01-06 16:52:40,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:40,749 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2021-01-06 16:52:40,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-01-06 16:52:40,749 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2021-01-06 16:52:40,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:40,750 INFO L225 Difference]: With dead ends: 110 [2021-01-06 16:52:40,750 INFO L226 Difference]: Without dead ends: 106 [2021-01-06 16:52:40,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-01-06 16:52:40,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-01-06 16:52:40,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2021-01-06 16:52:40,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2021-01-06 16:52:40,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2021-01-06 16:52:40,754 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2021-01-06 16:52:40,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:40,755 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2021-01-06 16:52:40,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2021-01-06 16:52:40,755 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2021-01-06 16:52:40,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-01-06 16:52:40,756 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:40,756 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:40,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-01-06 16:52:40,971 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:40,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:40,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1899170929, now seen corresponding path program 49 times [2021-01-06 16:52:40,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:40,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239339404] [2021-01-06 16:52:40,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:40,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:42,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:42,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239339404] [2021-01-06 16:52:42,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656248893] [2021-01-06 16:52:42,613 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:42,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:42,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 51 conjunts are in the unsatisfiable core [2021-01-06 16:52:42,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:42,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:42,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:42,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2021-01-06 16:52:42,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431529454] [2021-01-06 16:52:42,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-01-06 16:52:42,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:42,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-01-06 16:52:42,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-01-06 16:52:42,792 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 53 states. [2021-01-06 16:52:43,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:43,022 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2021-01-06 16:52:43,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-01-06 16:52:43,023 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2021-01-06 16:52:43,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:43,023 INFO L225 Difference]: With dead ends: 112 [2021-01-06 16:52:43,024 INFO L226 Difference]: Without dead ends: 108 [2021-01-06 16:52:43,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-01-06 16:52:43,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-01-06 16:52:43,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2021-01-06 16:52:43,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2021-01-06 16:52:43,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2021-01-06 16:52:43,028 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2021-01-06 16:52:43,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:43,029 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2021-01-06 16:52:43,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2021-01-06 16:52:43,029 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2021-01-06 16:52:43,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-01-06 16:52:43,029 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:43,029 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:43,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-01-06 16:52:43,241 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:43,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:43,242 INFO L82 PathProgramCache]: Analyzing trace with hash 311070353, now seen corresponding path program 50 times [2021-01-06 16:52:43,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:43,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241940737] [2021-01-06 16:52:43,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:43,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:44,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:44,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241940737] [2021-01-06 16:52:44,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453069974] [2021-01-06 16:52:44,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:45,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:52:45,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:45,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 52 conjunts are in the unsatisfiable core [2021-01-06 16:52:45,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:45,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:45,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:45,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2021-01-06 16:52:45,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716753542] [2021-01-06 16:52:45,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-01-06 16:52:45,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:45,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-01-06 16:52:45,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2021-01-06 16:52:45,178 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 54 states. [2021-01-06 16:52:45,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:45,404 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2021-01-06 16:52:45,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-01-06 16:52:45,404 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2021-01-06 16:52:45,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:45,406 INFO L225 Difference]: With dead ends: 114 [2021-01-06 16:52:45,406 INFO L226 Difference]: Without dead ends: 110 [2021-01-06 16:52:45,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2021-01-06 16:52:45,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-01-06 16:52:45,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2021-01-06 16:52:45,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2021-01-06 16:52:45,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2021-01-06 16:52:45,410 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2021-01-06 16:52:45,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:45,410 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2021-01-06 16:52:45,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2021-01-06 16:52:45,410 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2021-01-06 16:52:45,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-01-06 16:52:45,411 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:45,411 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:45,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:45,626 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:45,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:45,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1655869165, now seen corresponding path program 51 times [2021-01-06 16:52:45,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:45,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713660143] [2021-01-06 16:52:45,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:45,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:47,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:47,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713660143] [2021-01-06 16:52:47,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745637635] [2021-01-06 16:52:47,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:47,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2021-01-06 16:52:47,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:47,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 53 conjunts are in the unsatisfiable core [2021-01-06 16:52:47,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:47,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:47,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:47,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2021-01-06 16:52:47,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743213776] [2021-01-06 16:52:47,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-01-06 16:52:47,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:47,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-01-06 16:52:47,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2021-01-06 16:52:47,610 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 55 states. [2021-01-06 16:52:47,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:47,845 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2021-01-06 16:52:47,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-01-06 16:52:47,846 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2021-01-06 16:52:47,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:47,847 INFO L225 Difference]: With dead ends: 116 [2021-01-06 16:52:47,847 INFO L226 Difference]: Without dead ends: 112 [2021-01-06 16:52:47,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2021-01-06 16:52:47,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-01-06 16:52:47,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2021-01-06 16:52:47,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2021-01-06 16:52:47,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2021-01-06 16:52:47,851 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2021-01-06 16:52:47,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:47,852 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2021-01-06 16:52:47,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2021-01-06 16:52:47,852 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2021-01-06 16:52:47,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-01-06 16:52:47,852 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:47,853 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:48,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-01-06 16:52:48,065 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:48,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:48,066 INFO L82 PathProgramCache]: Analyzing trace with hash -2099135723, now seen corresponding path program 52 times [2021-01-06 16:52:48,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:48,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915115030] [2021-01-06 16:52:48,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:48,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:49,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:49,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915115030] [2021-01-06 16:52:49,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41863440] [2021-01-06 16:52:49,934 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:49,987 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:52:49,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:49,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 54 conjunts are in the unsatisfiable core [2021-01-06 16:52:49,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:50,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:50,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:50,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2021-01-06 16:52:50,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876700080] [2021-01-06 16:52:50,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-01-06 16:52:50,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:50,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-01-06 16:52:50,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2021-01-06 16:52:50,151 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 56 states. [2021-01-06 16:52:50,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:50,384 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2021-01-06 16:52:50,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-01-06 16:52:50,385 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2021-01-06 16:52:50,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:50,387 INFO L225 Difference]: With dead ends: 118 [2021-01-06 16:52:50,387 INFO L226 Difference]: Without dead ends: 114 [2021-01-06 16:52:50,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2021-01-06 16:52:50,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-01-06 16:52:50,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2021-01-06 16:52:50,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2021-01-06 16:52:50,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2021-01-06 16:52:50,391 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2021-01-06 16:52:50,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:50,392 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2021-01-06 16:52:50,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2021-01-06 16:52:50,392 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2021-01-06 16:52:50,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-01-06 16:52:50,393 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:50,393 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:50,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:50,607 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:50,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:50,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1418431639, now seen corresponding path program 53 times [2021-01-06 16:52:50,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:50,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935560466] [2021-01-06 16:52:50,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:50,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:52,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:52,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935560466] [2021-01-06 16:52:52,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696482086] [2021-01-06 16:52:52,406 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:52,478 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2021-01-06 16:52:52,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:52,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 55 conjunts are in the unsatisfiable core [2021-01-06 16:52:52,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:52,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:52,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:52,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 57 [2021-01-06 16:52:52,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540304015] [2021-01-06 16:52:52,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-01-06 16:52:52,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:52,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-01-06 16:52:52,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2021-01-06 16:52:52,637 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 57 states. [2021-01-06 16:52:52,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:52,893 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2021-01-06 16:52:52,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-01-06 16:52:52,893 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2021-01-06 16:52:52,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:52,894 INFO L225 Difference]: With dead ends: 120 [2021-01-06 16:52:52,895 INFO L226 Difference]: Without dead ends: 116 [2021-01-06 16:52:52,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2021-01-06 16:52:52,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-01-06 16:52:52,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2021-01-06 16:52:52,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2021-01-06 16:52:52,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2021-01-06 16:52:52,899 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2021-01-06 16:52:52,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:52,899 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2021-01-06 16:52:52,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2021-01-06 16:52:52,899 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2021-01-06 16:52:52,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-01-06 16:52:52,900 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:52,900 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:53,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-01-06 16:52:53,113 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:53,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:53,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1661404569, now seen corresponding path program 54 times [2021-01-06 16:52:53,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:53,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562162027] [2021-01-06 16:52:53,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:53,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:55,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:55,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562162027] [2021-01-06 16:52:55,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623316740] [2021-01-06 16:52:55,094 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:55,223 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2021-01-06 16:52:55,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:55,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 56 conjunts are in the unsatisfiable core [2021-01-06 16:52:55,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:55,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:55,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:55,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 58 [2021-01-06 16:52:55,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039071450] [2021-01-06 16:52:55,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-01-06 16:52:55,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:55,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-01-06 16:52:55,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2021-01-06 16:52:55,375 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 58 states. [2021-01-06 16:52:55,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:55,602 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2021-01-06 16:52:55,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-01-06 16:52:55,603 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2021-01-06 16:52:55,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:55,605 INFO L225 Difference]: With dead ends: 122 [2021-01-06 16:52:55,605 INFO L226 Difference]: Without dead ends: 118 [2021-01-06 16:52:55,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2021-01-06 16:52:55,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-01-06 16:52:55,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2021-01-06 16:52:55,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2021-01-06 16:52:55,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2021-01-06 16:52:55,609 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2021-01-06 16:52:55,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:55,609 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2021-01-06 16:52:55,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2021-01-06 16:52:55,609 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2021-01-06 16:52:55,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-01-06 16:52:55,610 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:55,610 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:55,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-01-06 16:52:55,824 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:55,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:55,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1064810981, now seen corresponding path program 55 times [2021-01-06 16:52:55,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:55,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049684533] [2021-01-06 16:52:55,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:55,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:57,737 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:57,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049684533] [2021-01-06 16:52:57,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959292158] [2021-01-06 16:52:57,738 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:57,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:57,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 57 conjunts are in the unsatisfiable core [2021-01-06 16:52:57,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:57,945 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:57,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:57,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 59 [2021-01-06 16:52:57,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279662871] [2021-01-06 16:52:57,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-01-06 16:52:57,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:57,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-01-06 16:52:57,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2021-01-06 16:52:57,948 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 59 states. [2021-01-06 16:52:58,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:58,137 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2021-01-06 16:52:58,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-01-06 16:52:58,138 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2021-01-06 16:52:58,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:58,139 INFO L225 Difference]: With dead ends: 124 [2021-01-06 16:52:58,140 INFO L226 Difference]: Without dead ends: 120 [2021-01-06 16:52:58,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2021-01-06 16:52:58,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-01-06 16:52:58,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2021-01-06 16:52:58,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2021-01-06 16:52:58,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2021-01-06 16:52:58,144 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2021-01-06 16:52:58,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:58,145 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2021-01-06 16:52:58,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2021-01-06 16:52:58,145 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2021-01-06 16:52:58,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-01-06 16:52:58,146 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:58,146 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:58,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:58,360 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:58,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:58,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1027903971, now seen corresponding path program 56 times [2021-01-06 16:52:58,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:58,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498908805] [2021-01-06 16:52:58,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:58,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:00,326 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:00,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498908805] [2021-01-06 16:53:00,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532608553] [2021-01-06 16:53:00,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:00,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:53:00,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:00,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 58 conjunts are in the unsatisfiable core [2021-01-06 16:53:00,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:00,546 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:00,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:00,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2021-01-06 16:53:00,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439395087] [2021-01-06 16:53:00,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-01-06 16:53:00,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:00,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-01-06 16:53:00,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2021-01-06 16:53:00,547 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 60 states. [2021-01-06 16:53:00,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:00,780 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2021-01-06 16:53:00,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-01-06 16:53:00,780 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 118 [2021-01-06 16:53:00,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:00,781 INFO L225 Difference]: With dead ends: 126 [2021-01-06 16:53:00,782 INFO L226 Difference]: Without dead ends: 122 [2021-01-06 16:53:00,782 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2021-01-06 16:53:00,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-01-06 16:53:00,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2021-01-06 16:53:00,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2021-01-06 16:53:00,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2021-01-06 16:53:00,788 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2021-01-06 16:53:00,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:00,788 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2021-01-06 16:53:00,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2021-01-06 16:53:00,788 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2021-01-06 16:53:00,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-01-06 16:53:00,789 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:00,789 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:01,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-01-06 16:53:01,004 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:01,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:01,004 INFO L82 PathProgramCache]: Analyzing trace with hash 79994271, now seen corresponding path program 57 times [2021-01-06 16:53:01,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:01,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605925297] [2021-01-06 16:53:01,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:01,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:03,149 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:03,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605925297] [2021-01-06 16:53:03,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230811102] [2021-01-06 16:53:03,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:03,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2021-01-06 16:53:03,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:03,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 59 conjunts are in the unsatisfiable core [2021-01-06 16:53:03,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:03,427 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:03,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:03,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 61 [2021-01-06 16:53:03,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466577212] [2021-01-06 16:53:03,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-01-06 16:53:03,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:03,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-01-06 16:53:03,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2021-01-06 16:53:03,429 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 61 states. [2021-01-06 16:53:03,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:03,650 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2021-01-06 16:53:03,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-01-06 16:53:03,650 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 120 [2021-01-06 16:53:03,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:03,651 INFO L225 Difference]: With dead ends: 128 [2021-01-06 16:53:03,652 INFO L226 Difference]: Without dead ends: 124 [2021-01-06 16:53:03,652 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2021-01-06 16:53:03,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-01-06 16:53:03,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2021-01-06 16:53:03,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2021-01-06 16:53:03,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2021-01-06 16:53:03,656 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2021-01-06 16:53:03,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:03,656 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2021-01-06 16:53:03,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2021-01-06 16:53:03,657 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2021-01-06 16:53:03,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-01-06 16:53:03,657 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:03,657 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:03,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:03,872 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:03,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:03,872 INFO L82 PathProgramCache]: Analyzing trace with hash -381684575, now seen corresponding path program 58 times [2021-01-06 16:53:03,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:03,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304053411] [2021-01-06 16:53:03,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:03,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:06,120 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:06,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304053411] [2021-01-06 16:53:06,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192276065] [2021-01-06 16:53:06,121 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:06,174 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:53:06,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:06,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 60 conjunts are in the unsatisfiable core [2021-01-06 16:53:06,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:06,353 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:06,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:06,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 62 [2021-01-06 16:53:06,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519096905] [2021-01-06 16:53:06,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-01-06 16:53:06,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:06,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-01-06 16:53:06,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2021-01-06 16:53:06,355 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 62 states. [2021-01-06 16:53:06,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:06,629 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2021-01-06 16:53:06,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-01-06 16:53:06,630 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 122 [2021-01-06 16:53:06,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:06,631 INFO L225 Difference]: With dead ends: 130 [2021-01-06 16:53:06,631 INFO L226 Difference]: Without dead ends: 126 [2021-01-06 16:53:06,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2021-01-06 16:53:06,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-01-06 16:53:06,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2021-01-06 16:53:06,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2021-01-06 16:53:06,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2021-01-06 16:53:06,635 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2021-01-06 16:53:06,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:06,635 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2021-01-06 16:53:06,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2021-01-06 16:53:06,635 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2021-01-06 16:53:06,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-01-06 16:53:06,636 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:06,636 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:06,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-01-06 16:53:06,850 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:06,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:06,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1673424093, now seen corresponding path program 59 times [2021-01-06 16:53:06,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:06,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108469981] [2021-01-06 16:53:06,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:06,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:09,225 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:09,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108469981] [2021-01-06 16:53:09,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297113238] [2021-01-06 16:53:09,225 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:09,313 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2021-01-06 16:53:09,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:09,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 61 conjunts are in the unsatisfiable core [2021-01-06 16:53:09,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:09,483 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:09,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:09,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 63 [2021-01-06 16:53:09,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491382593] [2021-01-06 16:53:09,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-01-06 16:53:09,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:09,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-01-06 16:53:09,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2021-01-06 16:53:09,486 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 63 states. [2021-01-06 16:53:09,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:09,781 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2021-01-06 16:53:09,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-01-06 16:53:09,782 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 124 [2021-01-06 16:53:09,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:09,783 INFO L225 Difference]: With dead ends: 132 [2021-01-06 16:53:09,783 INFO L226 Difference]: Without dead ends: 128 [2021-01-06 16:53:09,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2021-01-06 16:53:09,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-01-06 16:53:09,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2021-01-06 16:53:09,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2021-01-06 16:53:09,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2021-01-06 16:53:09,788 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2021-01-06 16:53:09,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:09,788 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2021-01-06 16:53:09,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2021-01-06 16:53:09,788 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2021-01-06 16:53:09,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-01-06 16:53:09,789 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:09,789 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:10,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-01-06 16:53:10,004 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:10,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:10,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1789552347, now seen corresponding path program 60 times [2021-01-06 16:53:10,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:10,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831363377] [2021-01-06 16:53:10,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:10,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:12,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:12,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831363377] [2021-01-06 16:53:12,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451572456] [2021-01-06 16:53:12,465 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:12,559 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2021-01-06 16:53:12,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:12,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 62 conjunts are in the unsatisfiable core [2021-01-06 16:53:12,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:12,736 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:12,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:12,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 64 [2021-01-06 16:53:12,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944788568] [2021-01-06 16:53:12,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2021-01-06 16:53:12,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:12,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-01-06 16:53:12,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2021-01-06 16:53:12,739 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 64 states. [2021-01-06 16:53:13,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:13,027 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2021-01-06 16:53:13,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-01-06 16:53:13,028 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 126 [2021-01-06 16:53:13,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:13,029 INFO L225 Difference]: With dead ends: 134 [2021-01-06 16:53:13,030 INFO L226 Difference]: Without dead ends: 130 [2021-01-06 16:53:13,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2021-01-06 16:53:13,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-01-06 16:53:13,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2021-01-06 16:53:13,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2021-01-06 16:53:13,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2021-01-06 16:53:13,033 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2021-01-06 16:53:13,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:13,033 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2021-01-06 16:53:13,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2021-01-06 16:53:13,033 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2021-01-06 16:53:13,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-01-06 16:53:13,034 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:13,034 INFO L422 BasicCegarLoop]: trace histogram [61, 61, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:13,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:13,245 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:13,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:13,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1719654745, now seen corresponding path program 61 times [2021-01-06 16:53:13,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:13,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593727620] [2021-01-06 16:53:13,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:13,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:15,783 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:15,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593727620] [2021-01-06 16:53:15,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066507900] [2021-01-06 16:53:15,783 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:15,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:15,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 63 conjunts are in the unsatisfiable core [2021-01-06 16:53:15,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:16,023 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:16,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:16,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 65 [2021-01-06 16:53:16,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108075347] [2021-01-06 16:53:16,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2021-01-06 16:53:16,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:16,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-01-06 16:53:16,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2021-01-06 16:53:16,025 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 65 states. [2021-01-06 16:53:16,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:16,280 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2021-01-06 16:53:16,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-01-06 16:53:16,280 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 128 [2021-01-06 16:53:16,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:16,281 INFO L225 Difference]: With dead ends: 136 [2021-01-06 16:53:16,281 INFO L226 Difference]: Without dead ends: 132 [2021-01-06 16:53:16,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2021-01-06 16:53:16,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-01-06 16:53:16,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2021-01-06 16:53:16,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2021-01-06 16:53:16,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2021-01-06 16:53:16,286 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2021-01-06 16:53:16,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:16,286 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2021-01-06 16:53:16,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2021-01-06 16:53:16,286 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2021-01-06 16:53:16,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-01-06 16:53:16,287 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:16,287 INFO L422 BasicCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:16,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:16,500 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:16,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:16,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1027431337, now seen corresponding path program 62 times [2021-01-06 16:53:16,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:16,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722444494] [2021-01-06 16:53:16,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:16,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:19,126 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:19,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722444494] [2021-01-06 16:53:19,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227516475] [2021-01-06 16:53:19,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:19,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:53:19,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:19,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 64 conjunts are in the unsatisfiable core [2021-01-06 16:53:19,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:19,361 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:19,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:19,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2021-01-06 16:53:19,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454702709] [2021-01-06 16:53:19,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-01-06 16:53:19,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:19,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-01-06 16:53:19,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2021-01-06 16:53:19,363 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 66 states. [2021-01-06 16:53:19,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:19,670 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2021-01-06 16:53:19,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-01-06 16:53:19,671 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 130 [2021-01-06 16:53:19,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:19,672 INFO L225 Difference]: With dead ends: 138 [2021-01-06 16:53:19,672 INFO L226 Difference]: Without dead ends: 134 [2021-01-06 16:53:19,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2021-01-06 16:53:19,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-01-06 16:53:19,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2021-01-06 16:53:19,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2021-01-06 16:53:19,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2021-01-06 16:53:19,676 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2021-01-06 16:53:19,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:19,676 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2021-01-06 16:53:19,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2021-01-06 16:53:19,676 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2021-01-06 16:53:19,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-01-06 16:53:19,677 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:19,677 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:19,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:19,888 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:19,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:19,889 INFO L82 PathProgramCache]: Analyzing trace with hash -427730901, now seen corresponding path program 63 times [2021-01-06 16:53:19,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:19,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699187579] [2021-01-06 16:53:19,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:19,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:22,634 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:22,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699187579] [2021-01-06 16:53:22,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662260081] [2021-01-06 16:53:22,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:22,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2021-01-06 16:53:22,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:22,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 65 conjunts are in the unsatisfiable core [2021-01-06 16:53:22,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:22,926 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:22,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:22,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 67 [2021-01-06 16:53:22,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656207415] [2021-01-06 16:53:22,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2021-01-06 16:53:22,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:22,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-01-06 16:53:22,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2021-01-06 16:53:22,928 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 67 states. [2021-01-06 16:53:23,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:23,249 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2021-01-06 16:53:23,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-01-06 16:53:23,250 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 132 [2021-01-06 16:53:23,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:23,251 INFO L225 Difference]: With dead ends: 140 [2021-01-06 16:53:23,251 INFO L226 Difference]: Without dead ends: 136 [2021-01-06 16:53:23,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2021-01-06 16:53:23,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-01-06 16:53:23,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2021-01-06 16:53:23,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2021-01-06 16:53:23,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2021-01-06 16:53:23,255 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2021-01-06 16:53:23,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:23,255 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2021-01-06 16:53:23,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2021-01-06 16:53:23,255 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2021-01-06 16:53:23,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-01-06 16:53:23,256 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:23,256 INFO L422 BasicCegarLoop]: trace histogram [64, 64, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:23,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:23,471 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:23,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:23,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1320696877, now seen corresponding path program 64 times [2021-01-06 16:53:23,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:23,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205780510] [2021-01-06 16:53:23,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:23,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:26,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:26,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205780510] [2021-01-06 16:53:26,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956308326] [2021-01-06 16:53:26,279 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:26,338 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:53:26,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:26,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 66 conjunts are in the unsatisfiable core [2021-01-06 16:53:26,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:26,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:26,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:26,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 68 [2021-01-06 16:53:26,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011602914] [2021-01-06 16:53:26,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2021-01-06 16:53:26,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:26,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-01-06 16:53:26,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2021-01-06 16:53:26,535 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 68 states. [2021-01-06 16:53:26,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:26,829 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2021-01-06 16:53:26,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-01-06 16:53:26,829 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 134 [2021-01-06 16:53:26,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:26,830 INFO L225 Difference]: With dead ends: 142 [2021-01-06 16:53:26,830 INFO L226 Difference]: Without dead ends: 138 [2021-01-06 16:53:26,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2021-01-06 16:53:26,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-01-06 16:53:26,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2021-01-06 16:53:26,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2021-01-06 16:53:26,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2021-01-06 16:53:26,834 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2021-01-06 16:53:26,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:26,835 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2021-01-06 16:53:26,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2021-01-06 16:53:26,835 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2021-01-06 16:53:26,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-01-06 16:53:26,836 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:26,836 INFO L422 BasicCegarLoop]: trace histogram [65, 65, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:27,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:27,048 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:27,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:27,048 INFO L82 PathProgramCache]: Analyzing trace with hash -2067388497, now seen corresponding path program 65 times [2021-01-06 16:53:27,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:27,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590615302] [2021-01-06 16:53:27,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:27,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:29,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:29,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590615302] [2021-01-06 16:53:29,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967326742] [2021-01-06 16:53:29,971 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:30,060 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2021-01-06 16:53:30,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:30,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 67 conjunts are in the unsatisfiable core [2021-01-06 16:53:30,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:30,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:30,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:30,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 69 [2021-01-06 16:53:30,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741102001] [2021-01-06 16:53:30,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-01-06 16:53:30,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:30,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-01-06 16:53:30,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2021-01-06 16:53:30,252 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 69 states. [2021-01-06 16:53:30,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:30,523 INFO L93 Difference]: Finished difference Result 144 states and 144 transitions. [2021-01-06 16:53:30,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-01-06 16:53:30,524 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 136 [2021-01-06 16:53:30,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:30,525 INFO L225 Difference]: With dead ends: 144 [2021-01-06 16:53:30,525 INFO L226 Difference]: Without dead ends: 140 [2021-01-06 16:53:30,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2021-01-06 16:53:30,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-01-06 16:53:30,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2021-01-06 16:53:30,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2021-01-06 16:53:30,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2021-01-06 16:53:30,530 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2021-01-06 16:53:30,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:30,530 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2021-01-06 16:53:30,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2021-01-06 16:53:30,530 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2021-01-06 16:53:30,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-01-06 16:53:30,531 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:30,531 INFO L422 BasicCegarLoop]: trace histogram [66, 66, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:30,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-01-06 16:53:30,745 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:30,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:30,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1862744753, now seen corresponding path program 66 times [2021-01-06 16:53:30,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:30,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391345731] [2021-01-06 16:53:30,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:30,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:33,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:33,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391345731] [2021-01-06 16:53:33,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399384429] [2021-01-06 16:53:33,763 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:33,869 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2021-01-06 16:53:33,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:33,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 68 conjunts are in the unsatisfiable core [2021-01-06 16:53:33,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:34,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:34,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:34,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 70 [2021-01-06 16:53:34,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251460236] [2021-01-06 16:53:34,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-01-06 16:53:34,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:34,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-01-06 16:53:34,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2021-01-06 16:53:34,064 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 70 states. [2021-01-06 16:53:34,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:34,337 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2021-01-06 16:53:34,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-01-06 16:53:34,338 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 138 [2021-01-06 16:53:34,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:34,339 INFO L225 Difference]: With dead ends: 146 [2021-01-06 16:53:34,339 INFO L226 Difference]: Without dead ends: 142 [2021-01-06 16:53:34,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2021-01-06 16:53:34,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-01-06 16:53:34,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2021-01-06 16:53:34,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2021-01-06 16:53:34,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2021-01-06 16:53:34,343 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2021-01-06 16:53:34,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:34,344 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2021-01-06 16:53:34,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2021-01-06 16:53:34,344 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2021-01-06 16:53:34,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-01-06 16:53:34,345 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:34,345 INFO L422 BasicCegarLoop]: trace histogram [67, 67, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:34,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-01-06 16:53:34,561 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:34,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:34,562 INFO L82 PathProgramCache]: Analyzing trace with hash -850422477, now seen corresponding path program 67 times [2021-01-06 16:53:34,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:34,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443733761] [2021-01-06 16:53:34,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:34,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:37,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:37,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443733761] [2021-01-06 16:53:37,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91879079] [2021-01-06 16:53:37,689 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:37,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:37,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 69 conjunts are in the unsatisfiable core [2021-01-06 16:53:37,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:37,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:37,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:37,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 71 [2021-01-06 16:53:37,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890167260] [2021-01-06 16:53:37,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-01-06 16:53:37,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:37,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-01-06 16:53:37,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2021-01-06 16:53:37,953 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 71 states. [2021-01-06 16:53:38,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:38,249 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2021-01-06 16:53:38,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-01-06 16:53:38,249 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 140 [2021-01-06 16:53:38,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:38,251 INFO L225 Difference]: With dead ends: 148 [2021-01-06 16:53:38,251 INFO L226 Difference]: Without dead ends: 144 [2021-01-06 16:53:38,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2021-01-06 16:53:38,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-01-06 16:53:38,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2021-01-06 16:53:38,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2021-01-06 16:53:38,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2021-01-06 16:53:38,254 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2021-01-06 16:53:38,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:38,254 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2021-01-06 16:53:38,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2021-01-06 16:53:38,255 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2021-01-06 16:53:38,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-01-06 16:53:38,255 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:38,255 INFO L422 BasicCegarLoop]: trace histogram [68, 68, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:38,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:38,456 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:38,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:38,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1158981835, now seen corresponding path program 68 times [2021-01-06 16:53:38,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:38,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265529284] [2021-01-06 16:53:38,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:38,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:41,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:41,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265529284] [2021-01-06 16:53:41,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626587901] [2021-01-06 16:53:41,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:41,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:53:41,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:41,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 70 conjunts are in the unsatisfiable core [2021-01-06 16:53:41,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:41,917 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:41,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:41,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 72 [2021-01-06 16:53:41,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164533701] [2021-01-06 16:53:41,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-01-06 16:53:41,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:41,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-01-06 16:53:41,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2021-01-06 16:53:41,919 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 72 states. [2021-01-06 16:53:42,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:42,248 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2021-01-06 16:53:42,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-01-06 16:53:42,249 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 142 [2021-01-06 16:53:42,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:42,250 INFO L225 Difference]: With dead ends: 150 [2021-01-06 16:53:42,250 INFO L226 Difference]: Without dead ends: 146 [2021-01-06 16:53:42,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2021-01-06 16:53:42,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-01-06 16:53:42,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2021-01-06 16:53:42,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2021-01-06 16:53:42,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2021-01-06 16:53:42,254 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2021-01-06 16:53:42,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:42,254 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2021-01-06 16:53:42,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2021-01-06 16:53:42,254 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2021-01-06 16:53:42,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-01-06 16:53:42,255 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:42,256 INFO L422 BasicCegarLoop]: trace histogram [69, 69, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:42,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-01-06 16:53:42,470 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:42,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:42,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1331781449, now seen corresponding path program 69 times [2021-01-06 16:53:42,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:42,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798712504] [2021-01-06 16:53:42,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:42,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:45,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:45,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798712504] [2021-01-06 16:53:45,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306255987] [2021-01-06 16:53:45,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:45,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2021-01-06 16:53:45,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:45,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 71 conjunts are in the unsatisfiable core [2021-01-06 16:53:45,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:46,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:46,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:46,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 73 [2021-01-06 16:53:46,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95513711] [2021-01-06 16:53:46,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 73 states [2021-01-06 16:53:46,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:46,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-01-06 16:53:46,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2021-01-06 16:53:46,083 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 73 states. [2021-01-06 16:53:46,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:46,446 INFO L93 Difference]: Finished difference Result 152 states and 152 transitions. [2021-01-06 16:53:46,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-01-06 16:53:46,446 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 144 [2021-01-06 16:53:46,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:46,447 INFO L225 Difference]: With dead ends: 152 [2021-01-06 16:53:46,447 INFO L226 Difference]: Without dead ends: 148 [2021-01-06 16:53:46,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2021-01-06 16:53:46,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-01-06 16:53:46,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2021-01-06 16:53:46,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2021-01-06 16:53:46,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2021-01-06 16:53:46,451 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 144 [2021-01-06 16:53:46,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:46,452 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2021-01-06 16:53:46,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2021-01-06 16:53:46,452 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2021-01-06 16:53:46,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-01-06 16:53:46,453 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:46,453 INFO L422 BasicCegarLoop]: trace histogram [70, 70, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:46,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-01-06 16:53:46,668 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:46,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:46,668 INFO L82 PathProgramCache]: Analyzing trace with hash 111514041, now seen corresponding path program 70 times [2021-01-06 16:53:46,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:46,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003379360] [2021-01-06 16:53:46,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:46,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:50,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:50,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003379360] [2021-01-06 16:53:50,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695273203] [2021-01-06 16:53:50,098 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:50,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:53:50,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:50,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 72 conjunts are in the unsatisfiable core [2021-01-06 16:53:50,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:50,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:50,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:50,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 74 [2021-01-06 16:53:50,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26061645] [2021-01-06 16:53:50,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2021-01-06 16:53:50,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:50,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-01-06 16:53:50,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2021-01-06 16:53:50,357 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 74 states. [2021-01-06 16:53:50,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:50,645 INFO L93 Difference]: Finished difference Result 154 states and 154 transitions. [2021-01-06 16:53:50,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-01-06 16:53:50,646 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 146 [2021-01-06 16:53:50,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:50,647 INFO L225 Difference]: With dead ends: 154 [2021-01-06 16:53:50,647 INFO L226 Difference]: Without dead ends: 150 [2021-01-06 16:53:50,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2021-01-06 16:53:50,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-01-06 16:53:50,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2021-01-06 16:53:50,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2021-01-06 16:53:50,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2021-01-06 16:53:50,651 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 146 [2021-01-06 16:53:50,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:50,652 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2021-01-06 16:53:50,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2021-01-06 16:53:50,652 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2021-01-06 16:53:50,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-01-06 16:53:50,652 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:50,653 INFO L422 BasicCegarLoop]: trace histogram [71, 71, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:50,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-01-06 16:53:50,867 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:50,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:50,868 INFO L82 PathProgramCache]: Analyzing trace with hash -155956677, now seen corresponding path program 71 times [2021-01-06 16:53:50,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:50,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249496400] [2021-01-06 16:53:50,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:50,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:54,372 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:54,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249496400] [2021-01-06 16:53:54,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145577184] [2021-01-06 16:53:54,372 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:54,467 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2021-01-06 16:53:54,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:54,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 73 conjunts are in the unsatisfiable core [2021-01-06 16:53:54,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:54,654 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:54,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:54,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 75 [2021-01-06 16:53:54,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093006428] [2021-01-06 16:53:54,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2021-01-06 16:53:54,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:54,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-01-06 16:53:54,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2021-01-06 16:53:54,656 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 75 states. [2021-01-06 16:53:55,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:55,062 INFO L93 Difference]: Finished difference Result 156 states and 156 transitions. [2021-01-06 16:53:55,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-01-06 16:53:55,063 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 148 [2021-01-06 16:53:55,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:55,064 INFO L225 Difference]: With dead ends: 156 [2021-01-06 16:53:55,065 INFO L226 Difference]: Without dead ends: 152 [2021-01-06 16:53:55,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2021-01-06 16:53:55,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-01-06 16:53:55,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2021-01-06 16:53:55,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2021-01-06 16:53:55,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2021-01-06 16:53:55,069 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 148 [2021-01-06 16:53:55,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:55,069 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2021-01-06 16:53:55,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2021-01-06 16:53:55,069 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2021-01-06 16:53:55,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-01-06 16:53:55,070 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:55,070 INFO L422 BasicCegarLoop]: trace histogram [72, 72, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:55,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:55,279 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:55,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:55,280 INFO L82 PathProgramCache]: Analyzing trace with hash 502721085, now seen corresponding path program 72 times [2021-01-06 16:53:55,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:55,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228298137] [2021-01-06 16:53:55,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:55,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:58,885 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:58,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228298137] [2021-01-06 16:53:58,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123131030] [2021-01-06 16:53:58,886 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:59,005 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2021-01-06 16:53:59,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:59,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 74 conjunts are in the unsatisfiable core [2021-01-06 16:53:59,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:59,208 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:59,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:59,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 76 [2021-01-06 16:53:59,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827168879] [2021-01-06 16:53:59,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2021-01-06 16:53:59,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:59,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-01-06 16:53:59,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2021-01-06 16:53:59,211 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 76 states. [2021-01-06 16:53:59,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:59,514 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2021-01-06 16:53:59,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-01-06 16:53:59,515 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 150 [2021-01-06 16:53:59,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:59,519 INFO L225 Difference]: With dead ends: 158 [2021-01-06 16:53:59,519 INFO L226 Difference]: Without dead ends: 154 [2021-01-06 16:53:59,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2021-01-06 16:53:59,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-01-06 16:53:59,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2021-01-06 16:53:59,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2021-01-06 16:53:59,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2021-01-06 16:53:59,523 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 150 [2021-01-06 16:53:59,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:59,524 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2021-01-06 16:53:59,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2021-01-06 16:53:59,524 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2021-01-06 16:53:59,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-01-06 16:53:59,525 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:59,525 INFO L422 BasicCegarLoop]: trace histogram [73, 73, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:59,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:59,739 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:59,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:59,740 INFO L82 PathProgramCache]: Analyzing trace with hash 2131857855, now seen corresponding path program 73 times [2021-01-06 16:53:59,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:59,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43481158] [2021-01-06 16:53:59,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:59,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:54:03,462 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:54:03,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43481158] [2021-01-06 16:54:03,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693153065] [2021-01-06 16:54:03,463 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:54:03,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:54:03,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 75 conjunts are in the unsatisfiable core [2021-01-06 16:54:03,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:54:03,728 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:54:03,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:54:03,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 77 [2021-01-06 16:54:03,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860129818] [2021-01-06 16:54:03,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 77 states [2021-01-06 16:54:03,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:54:03,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-01-06 16:54:03,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2021-01-06 16:54:03,730 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 77 states. [2021-01-06 16:54:04,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:54:04,132 INFO L93 Difference]: Finished difference Result 160 states and 160 transitions. [2021-01-06 16:54:04,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-01-06 16:54:04,133 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 152 [2021-01-06 16:54:04,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:54:04,134 INFO L225 Difference]: With dead ends: 160 [2021-01-06 16:54:04,134 INFO L226 Difference]: Without dead ends: 156 [2021-01-06 16:54:04,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2021-01-06 16:54:04,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-01-06 16:54:04,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2021-01-06 16:54:04,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2021-01-06 16:54:04,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2021-01-06 16:54:04,139 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 152 [2021-01-06 16:54:04,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:54:04,139 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2021-01-06 16:54:04,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2021-01-06 16:54:04,139 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2021-01-06 16:54:04,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-01-06 16:54:04,140 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:54:04,140 INFO L422 BasicCegarLoop]: trace histogram [74, 74, 1, 1, 1, 1, 1, 1] [2021-01-06 16:54:04,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:54:04,348 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:54:04,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:54:04,349 INFO L82 PathProgramCache]: Analyzing trace with hash 69230785, now seen corresponding path program 74 times [2021-01-06 16:54:04,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:54:04,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042799] [2021-01-06 16:54:04,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:54:04,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:54:08,175 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 0 proven. 5476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:54:08,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042799] [2021-01-06 16:54:08,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541565620] [2021-01-06 16:54:08,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:54:08,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:54:08,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:54:08,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 76 conjunts are in the unsatisfiable core [2021-01-06 16:54:08,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:54:08,455 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 0 proven. 5476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:54:08,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:54:08,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 78 [2021-01-06 16:54:08,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107752447] [2021-01-06 16:54:08,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-01-06 16:54:08,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:54:08,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-01-06 16:54:08,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2021-01-06 16:54:08,457 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 78 states. [2021-01-06 16:54:08,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:54:08,862 INFO L93 Difference]: Finished difference Result 162 states and 162 transitions. [2021-01-06 16:54:08,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-01-06 16:54:08,862 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 154 [2021-01-06 16:54:08,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:54:08,863 INFO L225 Difference]: With dead ends: 162 [2021-01-06 16:54:08,863 INFO L226 Difference]: Without dead ends: 158 [2021-01-06 16:54:08,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2021-01-06 16:54:08,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-01-06 16:54:08,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2021-01-06 16:54:08,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2021-01-06 16:54:08,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2021-01-06 16:54:08,867 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 154 [2021-01-06 16:54:08,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:54:08,868 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2021-01-06 16:54:08,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2021-01-06 16:54:08,868 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2021-01-06 16:54:08,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-01-06 16:54:08,869 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:54:08,869 INFO L422 BasicCegarLoop]: trace histogram [75, 75, 1, 1, 1, 1, 1, 1] [2021-01-06 16:54:09,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-01-06 16:54:09,084 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:54:09,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:54:09,085 INFO L82 PathProgramCache]: Analyzing trace with hash -2135460029, now seen corresponding path program 75 times [2021-01-06 16:54:09,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:54:09,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936080158] [2021-01-06 16:54:09,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:54:09,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:54:13,028 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:54:13,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936080158] [2021-01-06 16:54:13,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849437099] [2021-01-06 16:54:13,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:54:13,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2021-01-06 16:54:13,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:54:13,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 77 conjunts are in the unsatisfiable core [2021-01-06 16:54:13,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:54:13,373 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:54:13,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:54:13,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 79 [2021-01-06 16:54:13,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115454543] [2021-01-06 16:54:13,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 79 states [2021-01-06 16:54:13,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:54:13,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-01-06 16:54:13,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2021-01-06 16:54:13,375 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 79 states. [2021-01-06 16:54:13,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:54:13,761 INFO L93 Difference]: Finished difference Result 164 states and 164 transitions. [2021-01-06 16:54:13,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-01-06 16:54:13,762 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 156 [2021-01-06 16:54:13,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:54:13,763 INFO L225 Difference]: With dead ends: 164 [2021-01-06 16:54:13,763 INFO L226 Difference]: Without dead ends: 160 [2021-01-06 16:54:13,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2021-01-06 16:54:13,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-01-06 16:54:13,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 159. [2021-01-06 16:54:13,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2021-01-06 16:54:13,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2021-01-06 16:54:13,767 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 156 [2021-01-06 16:54:13,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:54:13,767 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2021-01-06 16:54:13,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 79 states. [2021-01-06 16:54:13,767 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2021-01-06 16:54:13,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-01-06 16:54:13,768 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:54:13,768 INFO L422 BasicCegarLoop]: trace histogram [76, 76, 1, 1, 1, 1, 1, 1] [2021-01-06 16:54:13,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:54:13,982 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:54:13,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:54:13,982 INFO L82 PathProgramCache]: Analyzing trace with hash 870511941, now seen corresponding path program 76 times [2021-01-06 16:54:13,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:54:13,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061100616] [2021-01-06 16:54:13,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:54:13,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:54:18,053 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:54:18,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061100616] [2021-01-06 16:54:18,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961172062] [2021-01-06 16:54:18,054 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:54:18,125 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:54:18,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:54:18,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 78 conjunts are in the unsatisfiable core [2021-01-06 16:54:18,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:54:18,334 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:54:18,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:54:18,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 80 [2021-01-06 16:54:18,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672751967] [2021-01-06 16:54:18,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2021-01-06 16:54:18,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:54:18,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-01-06 16:54:18,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2021-01-06 16:54:18,337 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 80 states. [2021-01-06 16:54:18,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:54:18,724 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2021-01-06 16:54:18,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-01-06 16:54:18,724 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 158 [2021-01-06 16:54:18,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:54:18,725 INFO L225 Difference]: With dead ends: 166 [2021-01-06 16:54:18,725 INFO L226 Difference]: Without dead ends: 162 [2021-01-06 16:54:18,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2021-01-06 16:54:18,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-01-06 16:54:18,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2021-01-06 16:54:18,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2021-01-06 16:54:18,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2021-01-06 16:54:18,728 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 158 [2021-01-06 16:54:18,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:54:18,729 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2021-01-06 16:54:18,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2021-01-06 16:54:18,729 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2021-01-06 16:54:18,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-01-06 16:54:18,730 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:54:18,730 INFO L422 BasicCegarLoop]: trace histogram [77, 77, 1, 1, 1, 1, 1, 1] [2021-01-06 16:54:18,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:54:18,946 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:54:18,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:54:18,946 INFO L82 PathProgramCache]: Analyzing trace with hash -903415097, now seen corresponding path program 77 times [2021-01-06 16:54:18,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:54:18,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271602043] [2021-01-06 16:54:18,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:54:18,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:54:23,130 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:54:23,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271602043] [2021-01-06 16:54:23,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684080332] [2021-01-06 16:54:23,130 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:54:23,226 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2021-01-06 16:54:23,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:54:23,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 79 conjunts are in the unsatisfiable core [2021-01-06 16:54:23,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:54:23,438 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:54:23,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:54:23,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 81 [2021-01-06 16:54:23,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024088208] [2021-01-06 16:54:23,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 81 states [2021-01-06 16:54:23,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:54:23,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-01-06 16:54:23,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2021-01-06 16:54:23,443 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 81 states. [2021-01-06 16:54:23,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:54:23,865 INFO L93 Difference]: Finished difference Result 168 states and 168 transitions. [2021-01-06 16:54:23,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-01-06 16:54:23,865 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 160 [2021-01-06 16:54:23,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:54:23,866 INFO L225 Difference]: With dead ends: 168 [2021-01-06 16:54:23,866 INFO L226 Difference]: Without dead ends: 164 [2021-01-06 16:54:23,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2021-01-06 16:54:23,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-01-06 16:54:23,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 163. [2021-01-06 16:54:23,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2021-01-06 16:54:23,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2021-01-06 16:54:23,870 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 160 [2021-01-06 16:54:23,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:54:23,871 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2021-01-06 16:54:23,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2021-01-06 16:54:23,871 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2021-01-06 16:54:23,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-01-06 16:54:23,872 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:54:23,872 INFO L422 BasicCegarLoop]: trace histogram [78, 78, 1, 1, 1, 1, 1, 1] [2021-01-06 16:54:24,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-01-06 16:54:24,087 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:54:24,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:54:24,087 INFO L82 PathProgramCache]: Analyzing trace with hash -545282103, now seen corresponding path program 78 times [2021-01-06 16:54:24,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:54:24,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058980820] [2021-01-06 16:54:24,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:54:24,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:54:28,410 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:54:28,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058980820] [2021-01-06 16:54:28,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265678399] [2021-01-06 16:54:28,411 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:54:28,535 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2021-01-06 16:54:28,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:54:28,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 80 conjunts are in the unsatisfiable core [2021-01-06 16:54:28,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:54:28,809 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:54:28,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:54:28,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 82 [2021-01-06 16:54:28,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480444724] [2021-01-06 16:54:28,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-01-06 16:54:28,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:54:28,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-01-06 16:54:28,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2021-01-06 16:54:28,811 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 82 states. [2021-01-06 16:54:29,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:54:29,259 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2021-01-06 16:54:29,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-01-06 16:54:29,259 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 162 [2021-01-06 16:54:29,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:54:29,260 INFO L225 Difference]: With dead ends: 170 [2021-01-06 16:54:29,260 INFO L226 Difference]: Without dead ends: 166 [2021-01-06 16:54:29,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2021-01-06 16:54:29,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-01-06 16:54:29,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 165. [2021-01-06 16:54:29,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2021-01-06 16:54:29,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2021-01-06 16:54:29,267 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 162 [2021-01-06 16:54:29,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:54:29,268 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2021-01-06 16:54:29,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2021-01-06 16:54:29,268 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2021-01-06 16:54:29,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-01-06 16:54:29,269 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:54:29,269 INFO L422 BasicCegarLoop]: trace histogram [79, 79, 1, 1, 1, 1, 1, 1] [2021-01-06 16:54:29,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-01-06 16:54:29,484 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:54:29,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:54:29,484 INFO L82 PathProgramCache]: Analyzing trace with hash 23141451, now seen corresponding path program 79 times [2021-01-06 16:54:29,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:54:29,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762363970] [2021-01-06 16:54:29,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:54:29,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:54:33,918 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:54:33,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762363970] [2021-01-06 16:54:33,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140704778] [2021-01-06 16:54:33,918 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:54:33,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:54:33,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 81 conjunts are in the unsatisfiable core [2021-01-06 16:54:33,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:54:34,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:54:34,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:54:34,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 83 [2021-01-06 16:54:34,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436573201] [2021-01-06 16:54:34,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 83 states [2021-01-06 16:54:34,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:54:34,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-01-06 16:54:34,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2021-01-06 16:54:34,193 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand 83 states. [2021-01-06 16:54:34,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:54:34,557 INFO L93 Difference]: Finished difference Result 172 states and 172 transitions. [2021-01-06 16:54:34,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-01-06 16:54:34,558 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 164 [2021-01-06 16:54:34,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:54:34,559 INFO L225 Difference]: With dead ends: 172 [2021-01-06 16:54:34,559 INFO L226 Difference]: Without dead ends: 168 [2021-01-06 16:54:34,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2021-01-06 16:54:34,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-01-06 16:54:34,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 167. [2021-01-06 16:54:34,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2021-01-06 16:54:34,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2021-01-06 16:54:34,563 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 164 [2021-01-06 16:54:34,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:54:34,564 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2021-01-06 16:54:34,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 83 states. [2021-01-06 16:54:34,564 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2021-01-06 16:54:34,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-01-06 16:54:34,564 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:54:34,565 INFO L422 BasicCegarLoop]: trace histogram [80, 80, 1, 1, 1, 1, 1, 1] [2021-01-06 16:54:34,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:54:34,766 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:54:34,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:54:34,766 INFO L82 PathProgramCache]: Analyzing trace with hash 817330253, now seen corresponding path program 80 times [2021-01-06 16:54:34,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:54:34,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16442863] [2021-01-06 16:54:34,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:54:34,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:54:39,342 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 0 proven. 6400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:54:39,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16442863] [2021-01-06 16:54:39,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827250647] [2021-01-06 16:54:39,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:54:39,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:54:39,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:54:39,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 82 conjunts are in the unsatisfiable core [2021-01-06 16:54:39,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:54:39,608 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 0 proven. 6400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:54:39,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:54:39,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 84 [2021-01-06 16:54:39,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891078700] [2021-01-06 16:54:39,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 84 states [2021-01-06 16:54:39,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:54:39,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-01-06 16:54:39,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2021-01-06 16:54:39,610 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 84 states. [2021-01-06 16:54:40,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:54:40,013 INFO L93 Difference]: Finished difference Result 174 states and 174 transitions. [2021-01-06 16:54:40,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-01-06 16:54:40,013 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 166 [2021-01-06 16:54:40,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:54:40,014 INFO L225 Difference]: With dead ends: 174 [2021-01-06 16:54:40,014 INFO L226 Difference]: Without dead ends: 170 [2021-01-06 16:54:40,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2021-01-06 16:54:40,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-01-06 16:54:40,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2021-01-06 16:54:40,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2021-01-06 16:54:40,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2021-01-06 16:54:40,017 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 166 [2021-01-06 16:54:40,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:54:40,017 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2021-01-06 16:54:40,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2021-01-06 16:54:40,017 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2021-01-06 16:54:40,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-01-06 16:54:40,018 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:54:40,018 INFO L422 BasicCegarLoop]: trace histogram [81, 81, 1, 1, 1, 1, 1, 1] [2021-01-06 16:54:40,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:54:40,219 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:54:40,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:54:40,221 INFO L82 PathProgramCache]: Analyzing trace with hash -471409713, now seen corresponding path program 81 times [2021-01-06 16:54:40,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:54:40,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542068387] [2021-01-06 16:54:40,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:54:40,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:54:44,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:54:44,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542068387] [2021-01-06 16:54:44,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517549519] [2021-01-06 16:54:44,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:54:45,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2021-01-06 16:54:45,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:54:45,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 83 conjunts are in the unsatisfiable core [2021-01-06 16:54:45,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:54:45,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:54:45,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:54:45,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 85 [2021-01-06 16:54:45,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169748821] [2021-01-06 16:54:45,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 85 states [2021-01-06 16:54:45,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:54:45,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-01-06 16:54:45,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2021-01-06 16:54:45,251 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand 85 states. [2021-01-06 16:54:45,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:54:45,742 INFO L93 Difference]: Finished difference Result 176 states and 176 transitions. [2021-01-06 16:54:45,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-01-06 16:54:45,743 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 168 [2021-01-06 16:54:45,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:54:45,744 INFO L225 Difference]: With dead ends: 176 [2021-01-06 16:54:45,744 INFO L226 Difference]: Without dead ends: 172 [2021-01-06 16:54:45,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2021-01-06 16:54:45,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-01-06 16:54:45,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 171. [2021-01-06 16:54:45,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2021-01-06 16:54:45,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2021-01-06 16:54:45,748 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 168 [2021-01-06 16:54:45,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:54:45,748 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2021-01-06 16:54:45,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 85 states. [2021-01-06 16:54:45,749 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2021-01-06 16:54:45,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-01-06 16:54:45,749 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:54:45,750 INFO L422 BasicCegarLoop]: trace histogram [82, 82, 1, 1, 1, 1, 1, 1] [2021-01-06 16:54:45,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:54:45,964 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:54:45,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:54:45,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1999935791, now seen corresponding path program 82 times [2021-01-06 16:54:45,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:54:45,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627953616] [2021-01-06 16:54:45,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:54:45,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:54:50,782 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:54:50,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627953616] [2021-01-06 16:54:50,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793424661] [2021-01-06 16:54:50,782 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:54:50,846 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:54:50,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:54:50,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 84 conjunts are in the unsatisfiable core [2021-01-06 16:54:50,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:54:51,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:54:51,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:54:51,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 86 [2021-01-06 16:54:51,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801147443] [2021-01-06 16:54:51,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 86 states [2021-01-06 16:54:51,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:54:51,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-01-06 16:54:51,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2021-01-06 16:54:51,073 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 86 states. [2021-01-06 16:54:51,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:54:51,515 INFO L93 Difference]: Finished difference Result 178 states and 178 transitions. [2021-01-06 16:54:51,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-01-06 16:54:51,516 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 170 [2021-01-06 16:54:51,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:54:51,517 INFO L225 Difference]: With dead ends: 178 [2021-01-06 16:54:51,517 INFO L226 Difference]: Without dead ends: 174 [2021-01-06 16:54:51,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2021-01-06 16:54:51,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-01-06 16:54:51,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 173. [2021-01-06 16:54:51,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2021-01-06 16:54:51,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2021-01-06 16:54:51,522 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 170 [2021-01-06 16:54:51,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:54:51,522 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2021-01-06 16:54:51,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 86 states. [2021-01-06 16:54:51,522 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2021-01-06 16:54:51,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-01-06 16:54:51,523 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:54:51,523 INFO L422 BasicCegarLoop]: trace histogram [83, 83, 1, 1, 1, 1, 1, 1] [2021-01-06 16:54:51,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:54:51,736 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:54:51,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:54:51,737 INFO L82 PathProgramCache]: Analyzing trace with hash -2034681517, now seen corresponding path program 83 times [2021-01-06 16:54:51,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:54:51,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637972603] [2021-01-06 16:54:51,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:54:51,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:54:56,726 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:54:56,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637972603] [2021-01-06 16:54:56,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030463035] [2021-01-06 16:54:56,727 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:54:56,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2021-01-06 16:54:56,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:54:56,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 85 conjunts are in the unsatisfiable core [2021-01-06 16:54:56,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:54:57,075 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:54:57,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:54:57,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 87 [2021-01-06 16:54:57,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595413830] [2021-01-06 16:54:57,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 87 states [2021-01-06 16:54:57,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:54:57,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-01-06 16:54:57,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2021-01-06 16:54:57,077 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 87 states. [2021-01-06 16:54:57,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:54:57,464 INFO L93 Difference]: Finished difference Result 180 states and 180 transitions. [2021-01-06 16:54:57,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-01-06 16:54:57,465 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 172 [2021-01-06 16:54:57,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:54:57,466 INFO L225 Difference]: With dead ends: 180 [2021-01-06 16:54:57,466 INFO L226 Difference]: Without dead ends: 176 [2021-01-06 16:54:57,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2021-01-06 16:54:57,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-01-06 16:54:57,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2021-01-06 16:54:57,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2021-01-06 16:54:57,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2021-01-06 16:54:57,473 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 172 [2021-01-06 16:54:57,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:54:57,473 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2021-01-06 16:54:57,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 87 states. [2021-01-06 16:54:57,473 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2021-01-06 16:54:57,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-01-06 16:54:57,474 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:54:57,474 INFO L422 BasicCegarLoop]: trace histogram [84, 84, 1, 1, 1, 1, 1, 1] [2021-01-06 16:54:57,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:54:57,688 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:54:57,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:54:57,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1065585835, now seen corresponding path program 84 times [2021-01-06 16:54:57,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:54:57,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088647972] [2021-01-06 16:54:57,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:54:57,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:02,824 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:55:02,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088647972] [2021-01-06 16:55:02,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609680283] [2021-01-06 16:55:02,825 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:02,960 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2021-01-06 16:55:02,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:02,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 86 conjunts are in the unsatisfiable core [2021-01-06 16:55:02,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:03,232 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:55:03,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:03,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 88 [2021-01-06 16:55:03,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154706776] [2021-01-06 16:55:03,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 88 states [2021-01-06 16:55:03,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:03,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-01-06 16:55:03,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2021-01-06 16:55:03,235 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 88 states. [2021-01-06 16:55:03,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:03,794 INFO L93 Difference]: Finished difference Result 182 states and 182 transitions. [2021-01-06 16:55:03,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-01-06 16:55:03,795 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 174 [2021-01-06 16:55:03,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:03,795 INFO L225 Difference]: With dead ends: 182 [2021-01-06 16:55:03,796 INFO L226 Difference]: Without dead ends: 178 [2021-01-06 16:55:03,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2021-01-06 16:55:03,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-01-06 16:55:03,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2021-01-06 16:55:03,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2021-01-06 16:55:03,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2021-01-06 16:55:03,799 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 174 [2021-01-06 16:55:03,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:03,800 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2021-01-06 16:55:03,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 88 states. [2021-01-06 16:55:03,800 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2021-01-06 16:55:03,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-01-06 16:55:03,801 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:03,801 INFO L422 BasicCegarLoop]: trace histogram [85, 85, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:04,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-01-06 16:55:04,002 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:04,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:04,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1772538665, now seen corresponding path program 85 times [2021-01-06 16:55:04,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:04,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314166256] [2021-01-06 16:55:04,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:04,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:09,370 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 0 proven. 7225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:55:09,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314166256] [2021-01-06 16:55:09,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742149849] [2021-01-06 16:55:09,371 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:09,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:09,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 87 conjunts are in the unsatisfiable core [2021-01-06 16:55:09,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:09,675 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 0 proven. 7225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:55:09,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:09,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 89 [2021-01-06 16:55:09,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965388245] [2021-01-06 16:55:09,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 89 states [2021-01-06 16:55:09,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:09,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-01-06 16:55:09,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2021-01-06 16:55:09,678 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand 89 states. [2021-01-06 16:55:10,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:10,221 INFO L93 Difference]: Finished difference Result 184 states and 184 transitions. [2021-01-06 16:55:10,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-01-06 16:55:10,222 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 176 [2021-01-06 16:55:10,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:10,223 INFO L225 Difference]: With dead ends: 184 [2021-01-06 16:55:10,223 INFO L226 Difference]: Without dead ends: 180 [2021-01-06 16:55:10,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2021-01-06 16:55:10,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-01-06 16:55:10,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 179. [2021-01-06 16:55:10,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2021-01-06 16:55:10,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2021-01-06 16:55:10,227 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 176 [2021-01-06 16:55:10,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:10,227 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2021-01-06 16:55:10,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 89 states. [2021-01-06 16:55:10,227 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2021-01-06 16:55:10,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-01-06 16:55:10,228 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:10,228 INFO L422 BasicCegarLoop]: trace histogram [86, 86, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:10,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:10,429 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:10,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:10,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1745591769, now seen corresponding path program 86 times [2021-01-06 16:55:10,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:10,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351563587] [2021-01-06 16:55:10,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:10,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:15,893 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 0 proven. 7396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:55:15,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351563587] [2021-01-06 16:55:15,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350563128] [2021-01-06 16:55:15,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:15,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:55:15,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:15,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 88 conjunts are in the unsatisfiable core [2021-01-06 16:55:15,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:16,200 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 0 proven. 7396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:55:16,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:16,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 90 [2021-01-06 16:55:16,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178691406] [2021-01-06 16:55:16,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 90 states [2021-01-06 16:55:16,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:16,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-01-06 16:55:16,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2021-01-06 16:55:16,202 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 90 states. [2021-01-06 16:55:16,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:16,751 INFO L93 Difference]: Finished difference Result 186 states and 186 transitions. [2021-01-06 16:55:16,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-01-06 16:55:16,752 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 178 [2021-01-06 16:55:16,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:16,753 INFO L225 Difference]: With dead ends: 186 [2021-01-06 16:55:16,753 INFO L226 Difference]: Without dead ends: 182 [2021-01-06 16:55:16,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2021-01-06 16:55:16,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-01-06 16:55:16,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2021-01-06 16:55:16,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2021-01-06 16:55:16,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2021-01-06 16:55:16,756 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 178 [2021-01-06 16:55:16,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:16,757 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2021-01-06 16:55:16,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 90 states. [2021-01-06 16:55:16,757 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2021-01-06 16:55:16,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-01-06 16:55:16,758 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:16,758 INFO L422 BasicCegarLoop]: trace histogram [87, 87, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:16,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-01-06 16:55:16,969 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:16,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:16,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1765290405, now seen corresponding path program 87 times [2021-01-06 16:55:16,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:16,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752928179] [2021-01-06 16:55:16,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:16,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:22,673 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:55:22,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752928179] [2021-01-06 16:55:22,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888690999] [2021-01-06 16:55:22,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:22,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2021-01-06 16:55:22,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:22,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 89 conjunts are in the unsatisfiable core [2021-01-06 16:55:22,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:23,104 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:55:23,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:23,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 91 [2021-01-06 16:55:23,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020800728] [2021-01-06 16:55:23,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 91 states [2021-01-06 16:55:23,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:23,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-01-06 16:55:23,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2021-01-06 16:55:23,107 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand 91 states. [2021-01-06 16:55:23,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:23,656 INFO L93 Difference]: Finished difference Result 188 states and 188 transitions. [2021-01-06 16:55:23,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-01-06 16:55:23,657 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 180 [2021-01-06 16:55:23,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:23,658 INFO L225 Difference]: With dead ends: 188 [2021-01-06 16:55:23,658 INFO L226 Difference]: Without dead ends: 184 [2021-01-06 16:55:23,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2021-01-06 16:55:23,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-01-06 16:55:23,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 183. [2021-01-06 16:55:23,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2021-01-06 16:55:23,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2021-01-06 16:55:23,662 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 180 [2021-01-06 16:55:23,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:23,662 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2021-01-06 16:55:23,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 91 states. [2021-01-06 16:55:23,663 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2021-01-06 16:55:23,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-01-06 16:55:23,663 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:23,664 INFO L422 BasicCegarLoop]: trace histogram [88, 88, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:23,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-01-06 16:55:23,878 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:23,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:23,878 INFO L82 PathProgramCache]: Analyzing trace with hash 121235037, now seen corresponding path program 88 times [2021-01-06 16:55:23,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:23,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540664054] [2021-01-06 16:55:23,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:23,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:29,672 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:55:29,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540664054] [2021-01-06 16:55:29,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687063795] [2021-01-06 16:55:29,673 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:29,753 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:55:29,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:29,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 90 conjunts are in the unsatisfiable core [2021-01-06 16:55:29,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:29,997 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:55:29,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:29,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 92 [2021-01-06 16:55:29,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890054897] [2021-01-06 16:55:29,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 92 states [2021-01-06 16:55:29,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:29,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-01-06 16:55:29,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2021-01-06 16:55:29,999 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 92 states. [2021-01-06 16:55:30,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:30,440 INFO L93 Difference]: Finished difference Result 190 states and 190 transitions. [2021-01-06 16:55:30,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-01-06 16:55:30,441 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 182 [2021-01-06 16:55:30,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:30,443 INFO L225 Difference]: With dead ends: 190 [2021-01-06 16:55:30,443 INFO L226 Difference]: Without dead ends: 186 [2021-01-06 16:55:30,443 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2021-01-06 16:55:30,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-01-06 16:55:30,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2021-01-06 16:55:30,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2021-01-06 16:55:30,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2021-01-06 16:55:30,448 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 182 [2021-01-06 16:55:30,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:30,448 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2021-01-06 16:55:30,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 92 states. [2021-01-06 16:55:30,448 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2021-01-06 16:55:30,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-01-06 16:55:30,449 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:30,449 INFO L422 BasicCegarLoop]: trace histogram [89, 89, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:30,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:30,663 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:30,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:30,663 INFO L82 PathProgramCache]: Analyzing trace with hash 595985887, now seen corresponding path program 89 times [2021-01-06 16:55:30,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:30,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126050386] [2021-01-06 16:55:30,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:30,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:36,650 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 0 proven. 7921 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:55:36,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126050386] [2021-01-06 16:55:36,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634690518] [2021-01-06 16:55:36,651 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:36,768 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2021-01-06 16:55:36,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:36,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 91 conjunts are in the unsatisfiable core [2021-01-06 16:55:36,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:37,049 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 0 proven. 7921 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:55:37,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:37,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 93 [2021-01-06 16:55:37,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745913181] [2021-01-06 16:55:37,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 93 states [2021-01-06 16:55:37,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:37,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-01-06 16:55:37,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2021-01-06 16:55:37,051 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand 93 states. [2021-01-06 16:55:37,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:37,571 INFO L93 Difference]: Finished difference Result 192 states and 192 transitions. [2021-01-06 16:55:37,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-01-06 16:55:37,572 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 184 [2021-01-06 16:55:37,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:37,573 INFO L225 Difference]: With dead ends: 192 [2021-01-06 16:55:37,573 INFO L226 Difference]: Without dead ends: 188 [2021-01-06 16:55:37,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2021-01-06 16:55:37,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-01-06 16:55:37,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 187. [2021-01-06 16:55:37,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2021-01-06 16:55:37,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2021-01-06 16:55:37,579 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 184 [2021-01-06 16:55:37,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:37,579 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2021-01-06 16:55:37,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 93 states. [2021-01-06 16:55:37,579 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2021-01-06 16:55:37,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-01-06 16:55:37,580 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:37,580 INFO L422 BasicCegarLoop]: trace histogram [90, 90, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:37,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:37,795 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:37,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:37,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1565019361, now seen corresponding path program 90 times [2021-01-06 16:55:37,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:37,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719748175] [2021-01-06 16:55:37,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:37,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:43,959 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:55:43,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719748175] [2021-01-06 16:55:43,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594110784] [2021-01-06 16:55:43,960 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:44,104 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2021-01-06 16:55:44,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:44,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 92 conjunts are in the unsatisfiable core [2021-01-06 16:55:44,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:44,392 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:55:44,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:44,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 94 [2021-01-06 16:55:44,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706018030] [2021-01-06 16:55:44,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 94 states [2021-01-06 16:55:44,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:44,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-01-06 16:55:44,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2021-01-06 16:55:44,395 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 94 states. [2021-01-06 16:55:45,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:45,029 INFO L93 Difference]: Finished difference Result 194 states and 194 transitions. [2021-01-06 16:55:45,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-01-06 16:55:45,029 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 186 [2021-01-06 16:55:45,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:45,030 INFO L225 Difference]: With dead ends: 194 [2021-01-06 16:55:45,030 INFO L226 Difference]: Without dead ends: 190 [2021-01-06 16:55:45,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2021-01-06 16:55:45,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-01-06 16:55:45,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 189. [2021-01-06 16:55:45,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2021-01-06 16:55:45,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 189 transitions. [2021-01-06 16:55:45,034 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 189 transitions. Word has length 186 [2021-01-06 16:55:45,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:45,034 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 189 transitions. [2021-01-06 16:55:45,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 94 states. [2021-01-06 16:55:45,034 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 189 transitions. [2021-01-06 16:55:45,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-01-06 16:55:45,040 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:45,041 INFO L422 BasicCegarLoop]: trace histogram [91, 91, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:45,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:45,242 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:45,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:45,243 INFO L82 PathProgramCache]: Analyzing trace with hash 798284643, now seen corresponding path program 91 times [2021-01-06 16:55:45,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:45,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154528251] [2021-01-06 16:55:45,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:45,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat