/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_nondet.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:51:52,479 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:51:52,484 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:51:52,518 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:51:52,519 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:51:52,521 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:51:52,523 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:51:52,525 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:51:52,528 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:51:52,529 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:51:52,531 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:51:52,532 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:51:52,533 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:51:52,535 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:51:52,536 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:51:52,538 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:51:52,540 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:51:52,541 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:51:52,543 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:51:52,546 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:51:52,552 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:51:52,554 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:51:52,556 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:51:52,557 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:51:52,560 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 16:51:52,565 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 16:51:52,566 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 16:51:52,567 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 16:51:52,568 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 16:51:52,570 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 16:51:52,570 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 16:51:52,571 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 16:51:52,572 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 16:51:52,572 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:51:52,573 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:51:52,574 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:51:52,576 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 16:51:52,639 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:51:52,639 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:51:52,641 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:51:52,641 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:51:52,641 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:51:52,642 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:51:52,642 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:51:52,642 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:51:52,642 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:51:52,642 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:51:52,643 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:51:52,643 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:51:52,643 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:51:52,643 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:51:52,643 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:51:52,643 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:51:52,644 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:51:52,644 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:51:52,644 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:51:52,644 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:51:52,644 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:51:52,645 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:51:52,645 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:51:52,645 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:51:52,645 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:51:52,645 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:51:52,998 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:51:53,027 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:51:53,030 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:51:53,032 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:51:53,033 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:51:53,034 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-new/count_by_nondet.i [2021-01-06 16:51:53,115 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/17d7c7e61/eabb2de2fafd4590ab295bae3e64eb23/FLAG54c7f31b8 [2021-01-06 16:51:53,771 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:51:53,772 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-new/count_by_nondet.i [2021-01-06 16:51:53,779 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/17d7c7e61/eabb2de2fafd4590ab295bae3e64eb23/FLAG54c7f31b8 [2021-01-06 16:51:54,149 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/17d7c7e61/eabb2de2fafd4590ab295bae3e64eb23 [2021-01-06 16:51:54,154 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:51:54,157 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:51:54,161 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:51:54,161 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:51:54,165 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:51:54,167 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:51:54" (1/1) ... [2021-01-06 16:51:54,169 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f0e68e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:51:54, skipping insertion in model container [2021-01-06 16:51:54,169 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:51:54" (1/1) ... [2021-01-06 16:51:54,178 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:51:54,198 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 16:51:54,374 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_nondet.i[891,904] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 16:51:54,386 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:51:54,395 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 16:51:54,410 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_nondet.i[891,904] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 16:51:54,414 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:51:54,431 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:51:54,431 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:51:54 WrapperNode [2021-01-06 16:51:54,435 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:51:54,436 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:51:54,439 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:51:54,439 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:51:54,448 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:51:54" (1/1) ... [2021-01-06 16:51:54,456 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:51:54" (1/1) ... [2021-01-06 16:51:54,475 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:51:54,476 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:51:54,476 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:51:54,476 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:51:54,486 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:51:54" (1/1) ... [2021-01-06 16:51:54,487 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:51:54" (1/1) ... [2021-01-06 16:51:54,488 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:51:54" (1/1) ... [2021-01-06 16:51:54,489 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:51:54" (1/1) ... [2021-01-06 16:51:54,493 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:51:54" (1/1) ... [2021-01-06 16:51:54,497 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:51:54" (1/1) ... [2021-01-06 16:51:54,499 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:51:54" (1/1) ... [2021-01-06 16:51:54,501 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:51:54,502 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:51:54,502 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:51:54,502 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:51:54,503 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:51:54" (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 16:51:54,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:51:54,608 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:51:54,608 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:51:54,608 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:51:54,826 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:51:54,826 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-01-06 16:51:54,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:51:54 BoogieIcfgContainer [2021-01-06 16:51:54,828 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:51:54,829 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:51:54,830 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:51:54,833 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:51:54,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:51:54" (1/3) ... [2021-01-06 16:51:54,834 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3df3dbe2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:51:54, skipping insertion in model container [2021-01-06 16:51:54,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:51:54" (2/3) ... [2021-01-06 16:51:54,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3df3dbe2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:51:54, skipping insertion in model container [2021-01-06 16:51:54,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:51:54" (3/3) ... [2021-01-06 16:51:54,836 INFO L111 eAbstractionObserver]: Analyzing ICFG count_by_nondet.i [2021-01-06 16:51:54,843 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:51:54,848 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 16:51:54,879 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 16:51:54,922 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:51:54,922 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:51:54,923 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:51:54,923 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:51:54,923 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:51:54,923 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:51:54,923 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:51:54,923 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:51:54,943 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2021-01-06 16:51:54,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 16:51:54,949 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:54,950 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 16:51:54,951 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:54,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:54,958 INFO L82 PathProgramCache]: Analyzing trace with hash 889906919, now seen corresponding path program 1 times [2021-01-06 16:51:54,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:54,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697167237] [2021-01-06 16:51:54,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:55,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:55,203 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 16:51:55,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697167237] [2021-01-06 16:51:55,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:51:55,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 16:51:55,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117420178] [2021-01-06 16:51:55,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 16:51:55,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:55,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 16:51:55,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 16:51:55,241 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2021-01-06 16:51:55,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:55,262 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2021-01-06 16:51:55,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 16:51:55,263 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2021-01-06 16:51:55,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:55,280 INFO L225 Difference]: With dead ends: 20 [2021-01-06 16:51:55,280 INFO L226 Difference]: Without dead ends: 8 [2021-01-06 16:51:55,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 16:51:55,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-01-06 16:51:55,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-01-06 16:51:55,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-01-06 16:51:55,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-01-06 16:51:55,326 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2021-01-06 16:51:55,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:55,327 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-01-06 16:51:55,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 16:51:55,328 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-01-06 16:51:55,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 16:51:55,328 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:55,328 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 16:51:55,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:51:55,330 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:55,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:55,333 INFO L82 PathProgramCache]: Analyzing trace with hash 889638800, now seen corresponding path program 1 times [2021-01-06 16:51:55,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:55,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228058736] [2021-01-06 16:51:55,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:55,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:55,430 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 16:51:55,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228058736] [2021-01-06 16:51:55,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:51:55,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 16:51:55,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224271616] [2021-01-06 16:51:55,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 16:51:55,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:55,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 16:51:55,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:51:55,437 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 3 states. [2021-01-06 16:51:55,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:55,481 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2021-01-06 16:51:55,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 16:51:55,485 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2021-01-06 16:51:55,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:55,486 INFO L225 Difference]: With dead ends: 14 [2021-01-06 16:51:55,489 INFO L226 Difference]: Without dead ends: 10 [2021-01-06 16:51:55,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:51:55,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-01-06 16:51:55,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2021-01-06 16:51:55,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-01-06 16:51:55,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-01-06 16:51:55,497 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2021-01-06 16:51:55,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:55,498 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-01-06 16:51:55,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 16:51:55,498 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-01-06 16:51:55,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 16:51:55,502 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:55,502 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:55,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 16:51:55,502 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:55,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:55,503 INFO L82 PathProgramCache]: Analyzing trace with hash 297537973, now seen corresponding path program 1 times [2021-01-06 16:51:55,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:55,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153999730] [2021-01-06 16:51:55,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:55,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:55,609 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 16:51:55,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153999730] [2021-01-06 16:51:55,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924040467] [2021-01-06 16:51:55,610 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 16:51:55,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:55,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 16:51:55,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:55,772 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 16:51:55,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:55,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 16:51:55,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711745849] [2021-01-06 16:51:55,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 16:51:55,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:55,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 16:51:55,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:51:55,776 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2021-01-06 16:51:55,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:55,807 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2021-01-06 16:51:55,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 16:51:55,808 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2021-01-06 16:51:55,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:55,809 INFO L225 Difference]: With dead ends: 15 [2021-01-06 16:51:55,809 INFO L226 Difference]: Without dead ends: 11 [2021-01-06 16:51:55,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:51:55,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-01-06 16:51:55,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-01-06 16:51:55,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-01-06 16:51:55,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2021-01-06 16:51:55,814 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2021-01-06 16:51:55,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:55,815 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2021-01-06 16:51:55,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 16:51:55,815 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2021-01-06 16:51:55,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 16:51:55,816 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:55,816 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:56,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 16:51:56,031 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:56,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:56,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1775673702, now seen corresponding path program 2 times [2021-01-06 16:51:56,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:56,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74439792] [2021-01-06 16:51:56,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:56,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:56,123 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 16:51:56,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74439792] [2021-01-06 16:51:56,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63847440] [2021-01-06 16:51:56,124 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 16:51:56,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:51:56,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:56,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 16:51:56,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:56,233 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 16:51:56,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:56,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-01-06 16:51:56,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997815773] [2021-01-06 16:51:56,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 16:51:56,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:56,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 16:51:56,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-01-06 16:51:56,236 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 8 states. [2021-01-06 16:51:56,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:56,261 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2021-01-06 16:51:56,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 16:51:56,262 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2021-01-06 16:51:56,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:56,262 INFO L225 Difference]: With dead ends: 18 [2021-01-06 16:51:56,263 INFO L226 Difference]: Without dead ends: 14 [2021-01-06 16:51:56,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:51:56,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-01-06 16:51:56,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2021-01-06 16:51:56,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-01-06 16:51:56,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-01-06 16:51:56,267 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2021-01-06 16:51:56,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:56,267 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-01-06 16:51:56,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 16:51:56,268 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-01-06 16:51:56,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 16:51:56,268 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:56,268 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:56,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:56,482 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:56,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:56,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1267268033, now seen corresponding path program 3 times [2021-01-06 16:51:56,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:56,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704464801] [2021-01-06 16:51:56,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:56,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:56,553 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 16:51:56,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704464801] [2021-01-06 16:51:56,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027592807] [2021-01-06 16:51:56,554 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 16:51:56,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 16:51:56,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:56,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 16:51:56,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:56,649 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 16:51:56,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:56,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-01-06 16:51:56,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29831440] [2021-01-06 16:51:56,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 16:51:56,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:56,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 16:51:56,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:51:56,652 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 9 states. [2021-01-06 16:51:56,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:56,674 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2021-01-06 16:51:56,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 16:51:56,675 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2021-01-06 16:51:56,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:56,676 INFO L225 Difference]: With dead ends: 20 [2021-01-06 16:51:56,676 INFO L226 Difference]: Without dead ends: 16 [2021-01-06 16:51:56,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:51:56,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-01-06 16:51:56,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2021-01-06 16:51:56,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-01-06 16:51:56,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-01-06 16:51:56,680 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2021-01-06 16:51:56,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:56,680 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-01-06 16:51:56,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 16:51:56,680 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-01-06 16:51:56,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 16:51:56,681 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:56,681 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:56,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:56,897 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:56,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:56,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1979275428, now seen corresponding path program 4 times [2021-01-06 16:51:56,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:56,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076419199] [2021-01-06 16:51:56,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:56,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:56,972 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 16:51:56,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076419199] [2021-01-06 16:51:56,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64923228] [2021-01-06 16:51:56,973 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 16:51:57,024 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:51:57,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:57,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 16:51:57,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:57,076 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 16:51:57,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:57,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-01-06 16:51:57,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940511655] [2021-01-06 16:51:57,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 16:51:57,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:57,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 16:51:57,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:51:57,079 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 10 states. [2021-01-06 16:51:57,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:57,107 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2021-01-06 16:51:57,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 16:51:57,107 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2021-01-06 16:51:57,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:57,108 INFO L225 Difference]: With dead ends: 22 [2021-01-06 16:51:57,108 INFO L226 Difference]: Without dead ends: 18 [2021-01-06 16:51:57,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:51:57,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-01-06 16:51:57,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-01-06 16:51:57,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 16:51:57,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-01-06 16:51:57,113 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2021-01-06 16:51:57,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:57,113 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-01-06 16:51:57,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 16:51:57,114 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-01-06 16:51:57,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 16:51:57,114 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:57,114 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:57,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:57,330 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:57,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:57,332 INFO L82 PathProgramCache]: Analyzing trace with hash -533682743, now seen corresponding path program 5 times [2021-01-06 16:51:57,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:57,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174278406] [2021-01-06 16:51:57,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:57,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:57,415 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 16:51:57,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174278406] [2021-01-06 16:51:57,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859301607] [2021-01-06 16:51:57,416 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 16:51:57,489 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 16:51:57,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:57,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 16:51:57,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:57,544 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 16:51:57,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:57,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-01-06 16:51:57,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810830500] [2021-01-06 16:51:57,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 16:51:57,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:57,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 16:51:57,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:51:57,547 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 11 states. [2021-01-06 16:51:57,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:57,579 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2021-01-06 16:51:57,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 16:51:57,579 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2021-01-06 16:51:57,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:57,580 INFO L225 Difference]: With dead ends: 24 [2021-01-06 16:51:57,580 INFO L226 Difference]: Without dead ends: 20 [2021-01-06 16:51:57,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-01-06 16:51:57,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-01-06 16:51:57,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-01-06 16:51:57,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 16:51:57,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2021-01-06 16:51:57,585 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2021-01-06 16:51:57,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:57,586 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2021-01-06 16:51:57,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 16:51:57,586 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2021-01-06 16:51:57,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 16:51:57,587 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:57,587 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:57,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-06 16:51:57,803 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:57,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:57,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1714864722, now seen corresponding path program 6 times [2021-01-06 16:51:57,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:57,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647001334] [2021-01-06 16:51:57,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:57,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:57,898 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 16:51:57,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647001334] [2021-01-06 16:51:57,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689438137] [2021-01-06 16:51:57,899 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 16:51:57,949 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 16:51:57,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:57,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 16:51:57,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:58,001 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 16:51:58,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:58,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-01-06 16:51:58,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452138352] [2021-01-06 16:51:58,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 16:51:58,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:58,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 16:51:58,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-01-06 16:51:58,004 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 12 states. [2021-01-06 16:51:58,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:58,031 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-01-06 16:51:58,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 16:51:58,032 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2021-01-06 16:51:58,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:58,032 INFO L225 Difference]: With dead ends: 26 [2021-01-06 16:51:58,032 INFO L226 Difference]: Without dead ends: 22 [2021-01-06 16:51:58,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:51:58,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-01-06 16:51:58,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-01-06 16:51:58,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-01-06 16:51:58,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2021-01-06 16:51:58,037 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2021-01-06 16:51:58,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:58,038 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2021-01-06 16:51:58,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 16:51:58,038 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2021-01-06 16:51:58,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 16:51:58,039 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:58,039 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:58,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:58,254 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:58,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:58,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1335586899, now seen corresponding path program 7 times [2021-01-06 16:51:58,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:58,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816770512] [2021-01-06 16:51:58,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:58,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:58,371 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 16:51:58,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816770512] [2021-01-06 16:51:58,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357426043] [2021-01-06 16:51:58,371 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 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 16:51:58,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:58,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 16:51:58,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:58,478 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 16:51:58,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:58,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-01-06 16:51:58,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539249734] [2021-01-06 16:51:58,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 16:51:58,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:58,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 16:51:58,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:51:58,481 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 13 states. [2021-01-06 16:51:58,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:58,511 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2021-01-06 16:51:58,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 16:51:58,511 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 20 [2021-01-06 16:51:58,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:58,512 INFO L225 Difference]: With dead ends: 28 [2021-01-06 16:51:58,512 INFO L226 Difference]: Without dead ends: 24 [2021-01-06 16:51:58,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-01-06 16:51:58,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-01-06 16:51:58,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-01-06 16:51:58,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 16:51:58,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2021-01-06 16:51:58,517 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2021-01-06 16:51:58,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:58,517 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2021-01-06 16:51:58,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 16:51:58,517 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2021-01-06 16:51:58,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 16:51:58,518 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:58,518 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:58,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:58,732 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:58,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:58,733 INFO L82 PathProgramCache]: Analyzing trace with hash -643068488, now seen corresponding path program 8 times [2021-01-06 16:51:58,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:58,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554412128] [2021-01-06 16:51:58,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:58,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:58,900 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 16:51:58,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554412128] [2021-01-06 16:51:58,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991480181] [2021-01-06 16:51:58,901 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 16:51:58,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:51:58,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:58,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 16:51:58,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:59,054 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 16:51:59,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:59,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-01-06 16:51:59,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938035349] [2021-01-06 16:51:59,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 16:51:59,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:59,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 16:51:59,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-01-06 16:51:59,057 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 14 states. [2021-01-06 16:51:59,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:59,106 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2021-01-06 16:51:59,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 16:51:59,107 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 22 [2021-01-06 16:51:59,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:59,107 INFO L225 Difference]: With dead ends: 30 [2021-01-06 16:51:59,108 INFO L226 Difference]: Without dead ends: 26 [2021-01-06 16:51:59,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2021-01-06 16:51:59,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-01-06 16:51:59,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-01-06 16:51:59,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 16:51:59,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2021-01-06 16:51:59,113 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2021-01-06 16:51:59,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:59,113 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2021-01-06 16:51:59,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 16:51:59,113 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2021-01-06 16:51:59,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 16:51:59,115 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:59,115 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:59,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 16:51:59,330 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:59,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:59,331 INFO L82 PathProgramCache]: Analyzing trace with hash 539616733, now seen corresponding path program 9 times [2021-01-06 16:51:59,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:59,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195772104] [2021-01-06 16:51:59,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:59,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:59,486 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 16:51:59,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195772104] [2021-01-06 16:51:59,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454619217] [2021-01-06 16:51:59,487 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 16:51:59,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-01-06 16:51:59,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:59,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 16:51:59,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:59,624 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 16:51:59,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:59,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-01-06 16:51:59,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55158835] [2021-01-06 16:51:59,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 16:51:59,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:59,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 16:51:59,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2021-01-06 16:51:59,627 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 15 states. [2021-01-06 16:51:59,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:59,671 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2021-01-06 16:51:59,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 16:51:59,672 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 24 [2021-01-06 16:51:59,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:59,673 INFO L225 Difference]: With dead ends: 32 [2021-01-06 16:51:59,673 INFO L226 Difference]: Without dead ends: 28 [2021-01-06 16:51:59,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-01-06 16:51:59,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-06 16:51:59,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-01-06 16:51:59,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 16:51:59,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-01-06 16:51:59,678 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2021-01-06 16:51:59,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:59,679 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-01-06 16:51:59,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 16:51:59,679 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-01-06 16:51:59,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 16:51:59,679 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:59,680 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:59,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:59,894 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:59,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:59,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1066219326, now seen corresponding path program 10 times [2021-01-06 16:51:59,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:59,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038611931] [2021-01-06 16:51:59,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:59,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:00,079 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 16:52:00,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038611931] [2021-01-06 16:52:00,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622026343] [2021-01-06 16:52:00,080 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 16:52:00,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:52:00,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:00,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 16:52:00,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:00,248 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 16:52:00,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:00,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-01-06 16:52:00,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601223758] [2021-01-06 16:52:00,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 16:52:00,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:00,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 16:52:00,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-01-06 16:52:00,251 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 16 states. [2021-01-06 16:52:00,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:00,298 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2021-01-06 16:52:00,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 16:52:00,298 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 26 [2021-01-06 16:52:00,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:00,299 INFO L225 Difference]: With dead ends: 34 [2021-01-06 16:52:00,299 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 16:52:00,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-01-06 16:52:00,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 16:52:00,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2021-01-06 16:52:00,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 16:52:00,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2021-01-06 16:52:00,304 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2021-01-06 16:52:00,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:00,305 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2021-01-06 16:52:00,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 16:52:00,305 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2021-01-06 16:52:00,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 16:52:00,306 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:00,306 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:00,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:00,522 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:00,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:00,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1913554535, now seen corresponding path program 11 times [2021-01-06 16:52:00,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:00,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064070653] [2021-01-06 16:52:00,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:00,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:00,736 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 16:52:00,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064070653] [2021-01-06 16:52:00,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713198768] [2021-01-06 16:52:00,736 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 16:52:00,796 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-01-06 16:52:00,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:00,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 16:52:00,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:00,894 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 16:52:00,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:00,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-01-06 16:52:00,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688416660] [2021-01-06 16:52:00,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 16:52:00,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:00,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 16:52:00,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2021-01-06 16:52:00,900 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 17 states. [2021-01-06 16:52:00,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:00,957 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2021-01-06 16:52:00,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 16:52:00,958 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 28 [2021-01-06 16:52:00,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:00,964 INFO L225 Difference]: With dead ends: 36 [2021-01-06 16:52:00,964 INFO L226 Difference]: Without dead ends: 32 [2021-01-06 16:52:00,965 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2021-01-06 16:52:00,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-01-06 16:52:00,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2021-01-06 16:52:00,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 16:52:00,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2021-01-06 16:52:00,980 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2021-01-06 16:52:00,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:00,981 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2021-01-06 16:52:00,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 16:52:00,981 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2021-01-06 16:52:00,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-01-06 16:52:00,982 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:00,982 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:01,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 16:52:01,183 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:01,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:01,184 INFO L82 PathProgramCache]: Analyzing trace with hash 733048524, now seen corresponding path program 12 times [2021-01-06 16:52:01,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:01,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796549568] [2021-01-06 16:52:01,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:01,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:01,391 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 16:52:01,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796549568] [2021-01-06 16:52:01,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100548607] [2021-01-06 16:52:01,392 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 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 16:52:01,471 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-01-06 16:52:01,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:01,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 16:52:01,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:01,561 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 16:52:01,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:01,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-01-06 16:52:01,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729299719] [2021-01-06 16:52:01,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 16:52:01,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:01,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 16:52:01,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2021-01-06 16:52:01,564 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 18 states. [2021-01-06 16:52:01,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:01,615 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2021-01-06 16:52:01,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 16:52:01,615 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 30 [2021-01-06 16:52:01,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:01,616 INFO L225 Difference]: With dead ends: 38 [2021-01-06 16:52:01,616 INFO L226 Difference]: Without dead ends: 34 [2021-01-06 16:52:01,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=212, Unknown=0, NotChecked=0, Total=342 [2021-01-06 16:52:01,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-01-06 16:52:01,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-01-06 16:52:01,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 16:52:01,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2021-01-06 16:52:01,621 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2021-01-06 16:52:01,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:01,622 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2021-01-06 16:52:01,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 16:52:01,622 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2021-01-06 16:52:01,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-06 16:52:01,623 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:01,623 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:01,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 16:52:01,838 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:01,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:01,839 INFO L82 PathProgramCache]: Analyzing trace with hash 138138097, now seen corresponding path program 13 times [2021-01-06 16:52:01,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:01,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838798902] [2021-01-06 16:52:01,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:01,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:02,034 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 16:52:02,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838798902] [2021-01-06 16:52:02,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904470722] [2021-01-06 16:52:02,035 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 16:52:02,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:02,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 16:52:02,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:02,191 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 16:52:02,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:02,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-01-06 16:52:02,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417458728] [2021-01-06 16:52:02,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 16:52:02,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:02,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 16:52:02,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2021-01-06 16:52:02,196 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 19 states. [2021-01-06 16:52:02,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:02,245 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2021-01-06 16:52:02,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 16:52:02,245 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 32 [2021-01-06 16:52:02,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:02,247 INFO L225 Difference]: With dead ends: 40 [2021-01-06 16:52:02,247 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 16:52:02,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2021-01-06 16:52:02,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 16:52:02,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-01-06 16:52:02,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 16:52:02,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2021-01-06 16:52:02,255 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2021-01-06 16:52:02,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:02,256 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2021-01-06 16:52:02,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 16:52:02,256 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2021-01-06 16:52:02,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 16:52:02,259 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:02,259 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:02,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 16:52:02,475 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:02,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:02,476 INFO L82 PathProgramCache]: Analyzing trace with hash -340131882, now seen corresponding path program 14 times [2021-01-06 16:52:02,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:02,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144976171] [2021-01-06 16:52:02,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:02,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:02,699 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 16:52:02,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144976171] [2021-01-06 16:52:02,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537078329] [2021-01-06 16:52:02,700 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 16:52:02,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:52:02,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:02,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 16:52:02,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:02,876 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 16:52:02,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:02,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-01-06 16:52:02,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750663470] [2021-01-06 16:52:02,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 16:52:02,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:02,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 16:52:02,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2021-01-06 16:52:02,879 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 20 states. [2021-01-06 16:52:02,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:02,933 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2021-01-06 16:52:02,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 16:52:02,934 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 34 [2021-01-06 16:52:02,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:02,936 INFO L225 Difference]: With dead ends: 42 [2021-01-06 16:52:02,936 INFO L226 Difference]: Without dead ends: 38 [2021-01-06 16:52:02,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=163, Invalid=257, Unknown=0, NotChecked=0, Total=420 [2021-01-06 16:52:02,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-01-06 16:52:02,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2021-01-06 16:52:02,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 16:52:02,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2021-01-06 16:52:02,945 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2021-01-06 16:52:02,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:02,946 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2021-01-06 16:52:02,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 16:52:02,946 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2021-01-06 16:52:02,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 16:52:02,947 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:02,947 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:03,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:03,162 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:03,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:03,163 INFO L82 PathProgramCache]: Analyzing trace with hash -396081029, now seen corresponding path program 15 times [2021-01-06 16:52:03,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:03,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791146385] [2021-01-06 16:52:03,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:03,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:03,386 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 16:52:03,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791146385] [2021-01-06 16:52:03,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059361928] [2021-01-06 16:52:03,387 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 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 16:52:03,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-01-06 16:52:03,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:03,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 16:52:03,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:03,591 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 16:52:03,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:03,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-01-06 16:52:03,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827504737] [2021-01-06 16:52:03,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 16:52:03,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:03,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 16:52:03,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2021-01-06 16:52:03,593 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 21 states. [2021-01-06 16:52:03,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:03,644 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2021-01-06 16:52:03,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 16:52:03,645 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 36 [2021-01-06 16:52:03,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:03,645 INFO L225 Difference]: With dead ends: 44 [2021-01-06 16:52:03,645 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 16:52:03,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=181, Invalid=281, Unknown=0, NotChecked=0, Total=462 [2021-01-06 16:52:03,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 16:52:03,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-01-06 16:52:03,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 16:52:03,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2021-01-06 16:52:03,650 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2021-01-06 16:52:03,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:03,650 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2021-01-06 16:52:03,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 16:52:03,651 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2021-01-06 16:52:03,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-06 16:52:03,651 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:03,651 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:03,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 16:52:03,866 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:03,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:03,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1671363552, now seen corresponding path program 16 times [2021-01-06 16:52:03,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:03,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671723821] [2021-01-06 16:52:03,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:03,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:04,104 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 16:52:04,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671723821] [2021-01-06 16:52:04,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873805318] [2021-01-06 16:52:04,105 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 16:52:04,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:52:04,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:04,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 16:52:04,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:04,273 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 16:52:04,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:04,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-01-06 16:52:04,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34678845] [2021-01-06 16:52:04,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 16:52:04,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:04,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 16:52:04,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2021-01-06 16:52:04,275 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 22 states. [2021-01-06 16:52:04,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:04,330 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2021-01-06 16:52:04,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 16:52:04,330 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 38 [2021-01-06 16:52:04,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:04,331 INFO L225 Difference]: With dead ends: 46 [2021-01-06 16:52:04,331 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 16:52:04,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=306, Unknown=0, NotChecked=0, Total=506 [2021-01-06 16:52:04,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 16:52:04,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-01-06 16:52:04,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-01-06 16:52:04,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2021-01-06 16:52:04,336 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2021-01-06 16:52:04,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:04,336 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2021-01-06 16:52:04,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 16:52:04,336 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2021-01-06 16:52:04,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 16:52:04,337 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:04,337 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:04,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 16:52:04,552 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:04,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:04,553 INFO L82 PathProgramCache]: Analyzing trace with hash -84252155, now seen corresponding path program 17 times [2021-01-06 16:52:04,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:04,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632795865] [2021-01-06 16:52:04,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:04,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:04,855 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 16:52:04,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632795865] [2021-01-06 16:52:04,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937482508] [2021-01-06 16:52:04,855 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 16:52:04,927 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-01-06 16:52:04,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:04,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 16:52:04,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:05,011 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 16:52:05,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:05,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-01-06 16:52:05,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372970758] [2021-01-06 16:52:05,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 16:52:05,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:05,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 16:52:05,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2021-01-06 16:52:05,015 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 23 states. [2021-01-06 16:52:05,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:05,060 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2021-01-06 16:52:05,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 16:52:05,061 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 40 [2021-01-06 16:52:05,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:05,062 INFO L225 Difference]: With dead ends: 48 [2021-01-06 16:52:05,062 INFO L226 Difference]: Without dead ends: 44 [2021-01-06 16:52:05,062 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=220, Invalid=332, Unknown=0, NotChecked=0, Total=552 [2021-01-06 16:52:05,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-01-06 16:52:05,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2021-01-06 16:52:05,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-01-06 16:52:05,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2021-01-06 16:52:05,067 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2021-01-06 16:52:05,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:05,068 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2021-01-06 16:52:05,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 16:52:05,068 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2021-01-06 16:52:05,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 16:52:05,068 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:05,069 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:05,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:05,283 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:05,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:05,284 INFO L82 PathProgramCache]: Analyzing trace with hash 691200746, now seen corresponding path program 18 times [2021-01-06 16:52:05,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:05,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724263716] [2021-01-06 16:52:05,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:05,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:05,545 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 16:52:05,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724263716] [2021-01-06 16:52:05,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340015466] [2021-01-06 16:52:05,546 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 16:52:05,636 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-01-06 16:52:05,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:05,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 16:52:05,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:05,735 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 16:52:05,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:05,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-01-06 16:52:05,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581872325] [2021-01-06 16:52:05,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 16:52:05,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:05,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 16:52:05,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2021-01-06 16:52:05,737 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 24 states. [2021-01-06 16:52:05,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:05,802 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2021-01-06 16:52:05,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 16:52:05,803 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 42 [2021-01-06 16:52:05,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:05,803 INFO L225 Difference]: With dead ends: 50 [2021-01-06 16:52:05,803 INFO L226 Difference]: Without dead ends: 46 [2021-01-06 16:52:05,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=241, Invalid=359, Unknown=0, NotChecked=0, Total=600 [2021-01-06 16:52:05,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-01-06 16:52:05,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-01-06 16:52:05,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-01-06 16:52:05,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2021-01-06 16:52:05,821 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2021-01-06 16:52:05,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:05,821 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2021-01-06 16:52:05,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 16:52:05,821 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2021-01-06 16:52:05,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-01-06 16:52:05,823 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:05,823 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:06,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:06,038 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:06,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:06,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1422870897, now seen corresponding path program 19 times [2021-01-06 16:52:06,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:06,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845528228] [2021-01-06 16:52:06,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:06,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:06,397 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 16:52:06,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845528228] [2021-01-06 16:52:06,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16238360] [2021-01-06 16:52:06,398 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 16:52:06,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:06,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 16:52:06,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:06,560 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 16:52:06,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:06,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-01-06 16:52:06,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563773205] [2021-01-06 16:52:06,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 16:52:06,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:06,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 16:52:06,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2021-01-06 16:52:06,563 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 25 states. [2021-01-06 16:52:06,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:06,623 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2021-01-06 16:52:06,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 16:52:06,623 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 44 [2021-01-06 16:52:06,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:06,624 INFO L225 Difference]: With dead ends: 52 [2021-01-06 16:52:06,624 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 16:52:06,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=263, Invalid=387, Unknown=0, NotChecked=0, Total=650 [2021-01-06 16:52:06,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 16:52:06,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2021-01-06 16:52:06,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-01-06 16:52:06,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2021-01-06 16:52:06,628 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2021-01-06 16:52:06,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:06,629 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2021-01-06 16:52:06,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 16:52:06,629 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2021-01-06 16:52:06,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 16:52:06,629 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:06,630 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:06,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:06,845 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:06,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:06,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1526188812, now seen corresponding path program 20 times [2021-01-06 16:52:06,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:06,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208823314] [2021-01-06 16:52:06,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:06,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:07,183 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 16:52:07,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208823314] [2021-01-06 16:52:07,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402178328] [2021-01-06 16:52:07,183 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 16:52:07,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:52:07,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:07,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 29 conjunts are in the unsatisfiable core [2021-01-06 16:52:07,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:07,370 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 16:52:07,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:07,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2021-01-06 16:52:07,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998531286] [2021-01-06 16:52:07,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 16:52:07,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:07,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 16:52:07,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2021-01-06 16:52:07,373 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 26 states. [2021-01-06 16:52:07,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:07,436 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2021-01-06 16:52:07,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 16:52:07,437 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 46 [2021-01-06 16:52:07,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:07,438 INFO L225 Difference]: With dead ends: 54 [2021-01-06 16:52:07,438 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 16:52:07,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=286, Invalid=416, Unknown=0, NotChecked=0, Total=702 [2021-01-06 16:52:07,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 16:52:07,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2021-01-06 16:52:07,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-01-06 16:52:07,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2021-01-06 16:52:07,442 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2021-01-06 16:52:07,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:07,442 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2021-01-06 16:52:07,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 16:52:07,443 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2021-01-06 16:52:07,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-06 16:52:07,443 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:07,443 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:07,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 16:52:07,658 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:07,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:07,658 INFO L82 PathProgramCache]: Analyzing trace with hash -2030457319, now seen corresponding path program 21 times [2021-01-06 16:52:07,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:07,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478171065] [2021-01-06 16:52:07,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:07,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:08,057 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 16:52:08,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478171065] [2021-01-06 16:52:08,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94805177] [2021-01-06 16:52:08,058 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 16:52:08,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-01-06 16:52:08,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:08,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 30 conjunts are in the unsatisfiable core [2021-01-06 16:52:08,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:08,243 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 16:52:08,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:08,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2021-01-06 16:52:08,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828553999] [2021-01-06 16:52:08,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 16:52:08,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:08,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 16:52:08,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2021-01-06 16:52:08,246 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 27 states. [2021-01-06 16:52:08,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:08,311 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2021-01-06 16:52:08,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 16:52:08,312 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 48 [2021-01-06 16:52:08,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:08,312 INFO L225 Difference]: With dead ends: 56 [2021-01-06 16:52:08,313 INFO L226 Difference]: Without dead ends: 52 [2021-01-06 16:52:08,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=310, Invalid=446, Unknown=0, NotChecked=0, Total=756 [2021-01-06 16:52:08,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-06 16:52:08,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2021-01-06 16:52:08,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-01-06 16:52:08,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2021-01-06 16:52:08,320 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2021-01-06 16:52:08,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:08,321 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2021-01-06 16:52:08,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 16:52:08,321 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2021-01-06 16:52:08,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-01-06 16:52:08,321 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:08,321 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:08,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-06 16:52:08,535 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:08,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:08,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1301188098, now seen corresponding path program 22 times [2021-01-06 16:52:08,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:08,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634821629] [2021-01-06 16:52:08,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:08,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:08,938 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 16:52:08,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634821629] [2021-01-06 16:52:08,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745645206] [2021-01-06 16:52:08,939 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 16:52:09,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:52:09,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:09,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 16:52:09,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:09,131 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 16:52:09,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:09,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2021-01-06 16:52:09,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277533402] [2021-01-06 16:52:09,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 16:52:09,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:09,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 16:52:09,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2021-01-06 16:52:09,134 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 28 states. [2021-01-06 16:52:09,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:09,201 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2021-01-06 16:52:09,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 16:52:09,202 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 50 [2021-01-06 16:52:09,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:09,203 INFO L225 Difference]: With dead ends: 58 [2021-01-06 16:52:09,203 INFO L226 Difference]: Without dead ends: 54 [2021-01-06 16:52:09,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=335, Invalid=477, Unknown=0, NotChecked=0, Total=812 [2021-01-06 16:52:09,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-01-06 16:52:09,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-01-06 16:52:09,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-01-06 16:52:09,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2021-01-06 16:52:09,206 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2021-01-06 16:52:09,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:09,207 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2021-01-06 16:52:09,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 16:52:09,207 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2021-01-06 16:52:09,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-01-06 16:52:09,207 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:09,208 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:09,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:09,422 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:09,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:09,423 INFO L82 PathProgramCache]: Analyzing trace with hash -553135965, now seen corresponding path program 23 times [2021-01-06 16:52:09,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:09,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303863567] [2021-01-06 16:52:09,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:09,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:09,882 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 16:52:09,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303863567] [2021-01-06 16:52:09,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410704228] [2021-01-06 16:52:09,882 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 16:52:09,977 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-01-06 16:52:09,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:09,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 16:52:09,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:10,071 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 16:52:10,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:10,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-01-06 16:52:10,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125095911] [2021-01-06 16:52:10,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 16:52:10,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:10,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 16:52:10,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2021-01-06 16:52:10,074 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 29 states. [2021-01-06 16:52:10,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:10,127 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2021-01-06 16:52:10,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 16:52:10,128 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 52 [2021-01-06 16:52:10,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:10,128 INFO L225 Difference]: With dead ends: 60 [2021-01-06 16:52:10,129 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 16:52:10,129 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=361, Invalid=509, Unknown=0, NotChecked=0, Total=870 [2021-01-06 16:52:10,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 16:52:10,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-01-06 16:52:10,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2021-01-06 16:52:10,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2021-01-06 16:52:10,132 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2021-01-06 16:52:10,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:10,133 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2021-01-06 16:52:10,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 16:52:10,133 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2021-01-06 16:52:10,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-01-06 16:52:10,133 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:10,133 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:10,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-06 16:52:10,348 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:10,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:10,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1065425416, now seen corresponding path program 24 times [2021-01-06 16:52:10,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:10,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676906373] [2021-01-06 16:52:10,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:10,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:10,808 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 16:52:10,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676906373] [2021-01-06 16:52:10,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52988041] [2021-01-06 16:52:10,809 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 16:52:10,935 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-01-06 16:52:10,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:10,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 33 conjunts are in the unsatisfiable core [2021-01-06 16:52:10,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:11,068 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 16:52:11,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:11,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-01-06 16:52:11,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901363520] [2021-01-06 16:52:11,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-01-06 16:52:11,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:11,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-01-06 16:52:11,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2021-01-06 16:52:11,072 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 30 states. [2021-01-06 16:52:11,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:11,138 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2021-01-06 16:52:11,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 16:52:11,138 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 54 [2021-01-06 16:52:11,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:11,139 INFO L225 Difference]: With dead ends: 62 [2021-01-06 16:52:11,139 INFO L226 Difference]: Without dead ends: 58 [2021-01-06 16:52:11,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=388, Invalid=542, Unknown=0, NotChecked=0, Total=930 [2021-01-06 16:52:11,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-01-06 16:52:11,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-01-06 16:52:11,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-01-06 16:52:11,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2021-01-06 16:52:11,142 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2021-01-06 16:52:11,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:11,142 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2021-01-06 16:52:11,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2021-01-06 16:52:11,142 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2021-01-06 16:52:11,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-06 16:52:11,143 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:11,143 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:11,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:11,348 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:11,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:11,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1724751405, now seen corresponding path program 25 times [2021-01-06 16:52:11,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:11,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867037168] [2021-01-06 16:52:11,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:11,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:11,817 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 16:52:11,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867037168] [2021-01-06 16:52:11,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306638649] [2021-01-06 16:52:11,818 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 16:52:11,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:11,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 29 conjunts are in the unsatisfiable core [2021-01-06 16:52:11,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:12,040 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 16:52:12,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:12,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-01-06 16:52:12,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412819720] [2021-01-06 16:52:12,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 16:52:12,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:12,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 16:52:12,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2021-01-06 16:52:12,043 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 31 states. [2021-01-06 16:52:12,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:12,111 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2021-01-06 16:52:12,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 16:52:12,112 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 56 [2021-01-06 16:52:12,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:12,112 INFO L225 Difference]: With dead ends: 64 [2021-01-06 16:52:12,113 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 16:52:12,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=416, Invalid=576, Unknown=0, NotChecked=0, Total=992 [2021-01-06 16:52:12,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 16:52:12,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-01-06 16:52:12,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-01-06 16:52:12,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2021-01-06 16:52:12,118 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2021-01-06 16:52:12,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:12,118 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2021-01-06 16:52:12,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-01-06 16:52:12,118 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2021-01-06 16:52:12,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-06 16:52:12,119 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:12,119 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:12,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 16:52:12,333 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:12,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:12,334 INFO L82 PathProgramCache]: Analyzing trace with hash -318132974, now seen corresponding path program 26 times [2021-01-06 16:52:12,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:12,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353736449] [2021-01-06 16:52:12,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:12,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:12,877 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 16:52:12,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353736449] [2021-01-06 16:52:12,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375342566] [2021-01-06 16:52:12,878 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 16:52:12,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:52:12,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:12,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 35 conjunts are in the unsatisfiable core [2021-01-06 16:52:12,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:13,094 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 16:52:13,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:13,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 32 [2021-01-06 16:52:13,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447755217] [2021-01-06 16:52:13,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 16:52:13,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:13,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 16:52:13,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2021-01-06 16:52:13,097 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 32 states. [2021-01-06 16:52:13,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:13,164 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2021-01-06 16:52:13,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 16:52:13,164 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 58 [2021-01-06 16:52:13,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:13,165 INFO L225 Difference]: With dead ends: 66 [2021-01-06 16:52:13,165 INFO L226 Difference]: Without dead ends: 62 [2021-01-06 16:52:13,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=445, Invalid=611, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 16:52:13,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-01-06 16:52:13,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-01-06 16:52:13,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2021-01-06 16:52:13,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2021-01-06 16:52:13,170 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2021-01-06 16:52:13,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:13,170 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2021-01-06 16:52:13,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 16:52:13,170 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2021-01-06 16:52:13,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-01-06 16:52:13,171 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:13,171 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:13,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 16:52:13,385 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:13,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:13,386 INFO L82 PathProgramCache]: Analyzing trace with hash -729966921, now seen corresponding path program 27 times [2021-01-06 16:52:13,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:13,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860426067] [2021-01-06 16:52:13,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:13,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:13,955 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 16:52:13,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860426067] [2021-01-06 16:52:13,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795687030] [2021-01-06 16:52:13,956 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 16:52:14,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-01-06 16:52:14,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:14,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 16:52:14,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:14,195 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 16:52:14,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:14,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 33 [2021-01-06 16:52:14,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746925912] [2021-01-06 16:52:14,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 16:52:14,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:14,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 16:52:14,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 16:52:14,198 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 33 states. [2021-01-06 16:52:14,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:14,267 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2021-01-06 16:52:14,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 16:52:14,267 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 60 [2021-01-06 16:52:14,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:14,270 INFO L225 Difference]: With dead ends: 68 [2021-01-06 16:52:14,270 INFO L226 Difference]: Without dead ends: 64 [2021-01-06 16:52:14,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=475, Invalid=647, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 16:52:14,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-01-06 16:52:14,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-01-06 16:52:14,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-01-06 16:52:14,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2021-01-06 16:52:14,281 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2021-01-06 16:52:14,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:14,281 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2021-01-06 16:52:14,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 16:52:14,282 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2021-01-06 16:52:14,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-01-06 16:52:14,282 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:14,282 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:14,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 16:52:14,497 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:14,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:14,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1365398756, now seen corresponding path program 28 times [2021-01-06 16:52:14,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:14,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871960355] [2021-01-06 16:52:14,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:14,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:15,127 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 16:52:15,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871960355] [2021-01-06 16:52:15,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963068274] [2021-01-06 16:52:15,128 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 16:52:15,216 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:52:15,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:15,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 32 conjunts are in the unsatisfiable core [2021-01-06 16:52:15,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:15,338 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 16:52:15,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:15,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 34 [2021-01-06 16:52:15,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982662495] [2021-01-06 16:52:15,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-01-06 16:52:15,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:15,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-01-06 16:52:15,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 16:52:15,341 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 34 states. [2021-01-06 16:52:15,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:15,421 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2021-01-06 16:52:15,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 16:52:15,421 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 62 [2021-01-06 16:52:15,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:15,422 INFO L225 Difference]: With dead ends: 70 [2021-01-06 16:52:15,422 INFO L226 Difference]: Without dead ends: 66 [2021-01-06 16:52:15,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=506, Invalid=684, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 16:52:15,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-01-06 16:52:15,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2021-01-06 16:52:15,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-01-06 16:52:15,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2021-01-06 16:52:15,427 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2021-01-06 16:52:15,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:15,428 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2021-01-06 16:52:15,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2021-01-06 16:52:15,430 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2021-01-06 16:52:15,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-01-06 16:52:15,430 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:15,430 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:15,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:15,644 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:15,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:15,644 INFO L82 PathProgramCache]: Analyzing trace with hash -2130036159, now seen corresponding path program 29 times [2021-01-06 16:52:15,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:15,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058818548] [2021-01-06 16:52:15,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:15,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:16,264 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 16:52:16,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058818548] [2021-01-06 16:52:16,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837502949] [2021-01-06 16:52:16,265 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 16:52:16,381 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2021-01-06 16:52:16,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:16,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 33 conjunts are in the unsatisfiable core [2021-01-06 16:52:16,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:16,483 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 16:52:16,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:16,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 35 [2021-01-06 16:52:16,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904231858] [2021-01-06 16:52:16,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-01-06 16:52:16,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:16,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-01-06 16:52:16,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 16:52:16,486 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 35 states. [2021-01-06 16:52:16,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:16,546 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2021-01-06 16:52:16,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-06 16:52:16,546 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 64 [2021-01-06 16:52:16,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:16,547 INFO L225 Difference]: With dead ends: 72 [2021-01-06 16:52:16,547 INFO L226 Difference]: Without dead ends: 68 [2021-01-06 16:52:16,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=538, Invalid=722, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 16:52:16,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-01-06 16:52:16,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2021-01-06 16:52:16,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-01-06 16:52:16,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2021-01-06 16:52:16,551 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2021-01-06 16:52:16,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:16,551 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2021-01-06 16:52:16,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2021-01-06 16:52:16,551 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2021-01-06 16:52:16,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-06 16:52:16,552 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:16,552 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:16,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-01-06 16:52:16,767 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:16,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:16,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1787794470, now seen corresponding path program 30 times [2021-01-06 16:52:16,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:16,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327267412] [2021-01-06 16:52:16,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:16,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:17,436 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 16:52:17,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327267412] [2021-01-06 16:52:17,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588327650] [2021-01-06 16:52:17,437 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 16:52:17,553 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-01-06 16:52:17,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:17,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 39 conjunts are in the unsatisfiable core [2021-01-06 16:52:17,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:17,662 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 16:52:17,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:17,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 36 [2021-01-06 16:52:17,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013344105] [2021-01-06 16:52:17,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-01-06 16:52:17,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:17,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-01-06 16:52:17,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 16:52:17,664 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 36 states. [2021-01-06 16:52:17,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:17,741 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2021-01-06 16:52:17,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 16:52:17,741 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 66 [2021-01-06 16:52:17,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:17,742 INFO L225 Difference]: With dead ends: 74 [2021-01-06 16:52:17,742 INFO L226 Difference]: Without dead ends: 70 [2021-01-06 16:52:17,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=571, Invalid=761, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 16:52:17,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-01-06 16:52:17,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2021-01-06 16:52:17,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2021-01-06 16:52:17,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2021-01-06 16:52:17,746 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2021-01-06 16:52:17,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:17,746 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2021-01-06 16:52:17,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-01-06 16:52:17,747 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2021-01-06 16:52:17,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-01-06 16:52:17,747 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:17,747 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:17,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:17,963 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:17,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:17,963 INFO L82 PathProgramCache]: Analyzing trace with hash 136710347, now seen corresponding path program 31 times [2021-01-06 16:52:17,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:17,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170810397] [2021-01-06 16:52:17,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:17,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:18,649 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 16:52:18,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170810397] [2021-01-06 16:52:18,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277963431] [2021-01-06 16:52:18,650 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 16:52:18,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:18,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 35 conjunts are in the unsatisfiable core [2021-01-06 16:52:18,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:18,879 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 16:52:18,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:18,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-01-06 16:52:18,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048564033] [2021-01-06 16:52:18,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-01-06 16:52:18,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:18,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-01-06 16:52:18,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 16:52:18,881 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 37 states. [2021-01-06 16:52:18,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:18,966 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2021-01-06 16:52:18,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-06 16:52:18,967 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 68 [2021-01-06 16:52:18,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:18,968 INFO L225 Difference]: With dead ends: 76 [2021-01-06 16:52:18,968 INFO L226 Difference]: Without dead ends: 72 [2021-01-06 16:52:18,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=605, Invalid=801, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 16:52:18,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-01-06 16:52:18,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2021-01-06 16:52:18,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2021-01-06 16:52:18,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2021-01-06 16:52:18,972 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2021-01-06 16:52:18,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:18,972 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2021-01-06 16:52:18,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2021-01-06 16:52:18,973 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2021-01-06 16:52:18,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-01-06 16:52:18,973 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:18,973 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:19,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-01-06 16:52:19,189 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:19,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:19,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1712199632, now seen corresponding path program 32 times [2021-01-06 16:52:19,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:19,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203621498] [2021-01-06 16:52:19,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:19,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:19,864 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 16:52:19,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203621498] [2021-01-06 16:52:19,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545486695] [2021-01-06 16:52:19,864 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 16:52:19,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:52:19,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:19,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 41 conjunts are in the unsatisfiable core [2021-01-06 16:52:19,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:20,087 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 16:52:20,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:20,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 38 [2021-01-06 16:52:20,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767378411] [2021-01-06 16:52:20,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-01-06 16:52:20,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:20,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-01-06 16:52:20,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 16:52:20,091 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 38 states. [2021-01-06 16:52:20,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:20,199 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2021-01-06 16:52:20,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-06 16:52:20,200 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 70 [2021-01-06 16:52:20,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:20,201 INFO L225 Difference]: With dead ends: 78 [2021-01-06 16:52:20,201 INFO L226 Difference]: Without dead ends: 74 [2021-01-06 16:52:20,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=640, Invalid=842, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 16:52:20,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-01-06 16:52:20,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2021-01-06 16:52:20,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-01-06 16:52:20,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2021-01-06 16:52:20,205 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2021-01-06 16:52:20,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:20,205 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2021-01-06 16:52:20,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2021-01-06 16:52:20,206 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2021-01-06 16:52:20,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-01-06 16:52:20,206 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:20,206 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:20,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-01-06 16:52:20,419 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:20,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:20,420 INFO L82 PathProgramCache]: Analyzing trace with hash -398228907, now seen corresponding path program 33 times [2021-01-06 16:52:20,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:20,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963427692] [2021-01-06 16:52:20,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:20,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:21,139 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 16:52:21,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963427692] [2021-01-06 16:52:21,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989302880] [2021-01-06 16:52:21,139 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 16:52:21,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2021-01-06 16:52:21,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:21,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 42 conjunts are in the unsatisfiable core [2021-01-06 16:52:21,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:21,401 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 16:52:21,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:21,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-01-06 16:52:21,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539432442] [2021-01-06 16:52:21,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-01-06 16:52:21,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:21,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-01-06 16:52:21,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 16:52:21,403 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 39 states. [2021-01-06 16:52:21,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:21,488 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2021-01-06 16:52:21,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-06 16:52:21,488 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 72 [2021-01-06 16:52:21,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:21,489 INFO L225 Difference]: With dead ends: 80 [2021-01-06 16:52:21,489 INFO L226 Difference]: Without dead ends: 76 [2021-01-06 16:52:21,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=676, Invalid=884, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 16:52:21,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-01-06 16:52:21,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2021-01-06 16:52:21,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2021-01-06 16:52:21,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2021-01-06 16:52:21,493 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2021-01-06 16:52:21,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:21,494 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2021-01-06 16:52:21,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2021-01-06 16:52:21,494 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2021-01-06 16:52:21,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-01-06 16:52:21,494 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:21,495 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:21,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-01-06 16:52:21,709 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:21,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:21,709 INFO L82 PathProgramCache]: Analyzing trace with hash -392747206, now seen corresponding path program 34 times [2021-01-06 16:52:21,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:21,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371047527] [2021-01-06 16:52:21,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:21,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:22,474 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 16:52:22,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371047527] [2021-01-06 16:52:22,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771111512] [2021-01-06 16:52:22,475 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 16:52:22,565 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:52:22,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:22,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 38 conjunts are in the unsatisfiable core [2021-01-06 16:52:22,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:22,693 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 16:52:22,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:22,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 40 [2021-01-06 16:52:22,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746137489] [2021-01-06 16:52:22,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-01-06 16:52:22,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:22,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-01-06 16:52:22,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=852, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 16:52:22,696 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 40 states. [2021-01-06 16:52:22,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:22,787 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2021-01-06 16:52:22,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-06 16:52:22,787 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 74 [2021-01-06 16:52:22,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:22,788 INFO L225 Difference]: With dead ends: 82 [2021-01-06 16:52:22,788 INFO L226 Difference]: Without dead ends: 78 [2021-01-06 16:52:22,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=713, Invalid=927, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 16:52:22,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-01-06 16:52:22,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2021-01-06 16:52:22,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2021-01-06 16:52:22,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2021-01-06 16:52:22,792 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2021-01-06 16:52:22,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:22,792 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2021-01-06 16:52:22,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2021-01-06 16:52:22,793 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2021-01-06 16:52:22,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-06 16:52:22,793 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:22,793 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:23,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-01-06 16:52:23,006 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:23,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:23,007 INFO L82 PathProgramCache]: Analyzing trace with hash 580200159, now seen corresponding path program 35 times [2021-01-06 16:52:23,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:23,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306642851] [2021-01-06 16:52:23,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:23,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:23,832 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 16:52:23,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306642851] [2021-01-06 16:52:23,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731739178] [2021-01-06 16:52:23,833 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 16:52:23,960 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2021-01-06 16:52:23,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:23,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 39 conjunts are in the unsatisfiable core [2021-01-06 16:52:23,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:24,095 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 16:52:24,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:24,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 41 [2021-01-06 16:52:24,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211138960] [2021-01-06 16:52:24,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-01-06 16:52:24,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:24,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-01-06 16:52:24,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=746, Invalid=894, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 16:52:24,097 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 41 states. [2021-01-06 16:52:24,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:24,171 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2021-01-06 16:52:24,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-06 16:52:24,171 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 76 [2021-01-06 16:52:24,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:24,172 INFO L225 Difference]: With dead ends: 84 [2021-01-06 16:52:24,172 INFO L226 Difference]: Without dead ends: 80 [2021-01-06 16:52:24,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=751, Invalid=971, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 16:52:24,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-01-06 16:52:24,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2021-01-06 16:52:24,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-01-06 16:52:24,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2021-01-06 16:52:24,176 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2021-01-06 16:52:24,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:24,177 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2021-01-06 16:52:24,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2021-01-06 16:52:24,177 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2021-01-06 16:52:24,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-01-06 16:52:24,177 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:24,178 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:24,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-01-06 16:52:24,384 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:24,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:24,384 INFO L82 PathProgramCache]: Analyzing trace with hash -720252604, now seen corresponding path program 36 times [2021-01-06 16:52:24,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:24,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656536998] [2021-01-06 16:52:24,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:24,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:25,296 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 16:52:25,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656536998] [2021-01-06 16:52:25,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936398027] [2021-01-06 16:52:25,297 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 16:52:25,435 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2021-01-06 16:52:25,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:25,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 45 conjunts are in the unsatisfiable core [2021-01-06 16:52:25,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:25,587 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 16:52:25,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:25,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 42 [2021-01-06 16:52:25,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056670478] [2021-01-06 16:52:25,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-01-06 16:52:25,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:25,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-01-06 16:52:25,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=937, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 16:52:25,590 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 42 states. [2021-01-06 16:52:25,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:25,668 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2021-01-06 16:52:25,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-06 16:52:25,669 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 78 [2021-01-06 16:52:25,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:25,669 INFO L225 Difference]: With dead ends: 86 [2021-01-06 16:52:25,669 INFO L226 Difference]: Without dead ends: 82 [2021-01-06 16:52:25,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=790, Invalid=1016, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 16:52:25,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-01-06 16:52:25,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2021-01-06 16:52:25,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2021-01-06 16:52:25,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2021-01-06 16:52:25,674 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2021-01-06 16:52:25,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:25,674 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2021-01-06 16:52:25,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2021-01-06 16:52:25,674 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2021-01-06 16:52:25,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-01-06 16:52:25,675 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:25,675 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:25,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-06 16:52:25,889 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:25,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:25,890 INFO L82 PathProgramCache]: Analyzing trace with hash -619874711, now seen corresponding path program 37 times [2021-01-06 16:52:25,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:25,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637425808] [2021-01-06 16:52:25,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:25,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:26,748 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 16:52:26,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637425808] [2021-01-06 16:52:26,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780314384] [2021-01-06 16:52:26,748 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 16:52:26,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:26,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 41 conjunts are in the unsatisfiable core [2021-01-06 16:52:26,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:26,993 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 16:52:26,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:26,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 43 [2021-01-06 16:52:26,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688503731] [2021-01-06 16:52:26,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-01-06 16:52:26,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:26,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-01-06 16:52:26,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=825, Invalid=981, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 16:52:26,996 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 43 states. [2021-01-06 16:52:27,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:27,088 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2021-01-06 16:52:27,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-06 16:52:27,089 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 80 [2021-01-06 16:52:27,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:27,090 INFO L225 Difference]: With dead ends: 88 [2021-01-06 16:52:27,090 INFO L226 Difference]: Without dead ends: 84 [2021-01-06 16:52:27,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=830, Invalid=1062, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 16:52:27,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-01-06 16:52:27,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2021-01-06 16:52:27,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2021-01-06 16:52:27,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2021-01-06 16:52:27,097 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2021-01-06 16:52:27,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:27,097 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2021-01-06 16:52:27,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2021-01-06 16:52:27,098 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2021-01-06 16:52:27,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-01-06 16:52:27,099 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:27,099 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:27,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-06 16:52:27,313 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:27,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:27,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1353999950, now seen corresponding path program 38 times [2021-01-06 16:52:27,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:27,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022862147] [2021-01-06 16:52:27,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:27,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:28,319 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 16:52:28,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022862147] [2021-01-06 16:52:28,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064330177] [2021-01-06 16:52:28,319 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 16:52:28,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:52:28,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:28,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 47 conjunts are in the unsatisfiable core [2021-01-06 16:52:28,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:28,567 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 16:52:28,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:28,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 44 [2021-01-06 16:52:28,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445979670] [2021-01-06 16:52:28,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-01-06 16:52:28,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:28,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-01-06 16:52:28,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=866, Invalid=1026, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 16:52:28,570 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 44 states. [2021-01-06 16:52:28,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:28,678 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2021-01-06 16:52:28,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-06 16:52:28,679 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 82 [2021-01-06 16:52:28,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:28,680 INFO L225 Difference]: With dead ends: 90 [2021-01-06 16:52:28,680 INFO L226 Difference]: Without dead ends: 86 [2021-01-06 16:52:28,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=871, Invalid=1109, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 16:52:28,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-01-06 16:52:28,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2021-01-06 16:52:28,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2021-01-06 16:52:28,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2021-01-06 16:52:28,684 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2021-01-06 16:52:28,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:28,684 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2021-01-06 16:52:28,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2021-01-06 16:52:28,684 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2021-01-06 16:52:28,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-01-06 16:52:28,685 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:28,685 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:28,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-06 16:52:28,900 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:28,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:28,900 INFO L82 PathProgramCache]: Analyzing trace with hash -127995661, now seen corresponding path program 39 times [2021-01-06 16:52:28,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:28,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866786782] [2021-01-06 16:52:28,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:28,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:29,922 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 16:52:29,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866786782] [2021-01-06 16:52:29,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388878687] [2021-01-06 16:52:29,923 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 16:52:30,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2021-01-06 16:52:30,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:30,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 48 conjunts are in the unsatisfiable core [2021-01-06 16:52:30,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:30,224 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 16:52:30,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:30,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 45 [2021-01-06 16:52:30,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120618747] [2021-01-06 16:52:30,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-01-06 16:52:30,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:30,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-01-06 16:52:30,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=908, Invalid=1072, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 16:52:30,227 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 45 states. [2021-01-06 16:52:30,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:30,320 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2021-01-06 16:52:30,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-06 16:52:30,321 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 84 [2021-01-06 16:52:30,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:30,322 INFO L225 Difference]: With dead ends: 92 [2021-01-06 16:52:30,322 INFO L226 Difference]: Without dead ends: 88 [2021-01-06 16:52:30,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=913, Invalid=1157, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 16:52:30,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-01-06 16:52:30,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2021-01-06 16:52:30,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2021-01-06 16:52:30,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2021-01-06 16:52:30,326 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2021-01-06 16:52:30,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:30,326 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2021-01-06 16:52:30,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2021-01-06 16:52:30,326 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2021-01-06 16:52:30,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-06 16:52:30,327 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:30,327 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:30,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:30,537 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:30,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:30,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1603364440, now seen corresponding path program 40 times [2021-01-06 16:52:30,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:30,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253753381] [2021-01-06 16:52:30,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:30,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:31,677 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 16:52:31,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253753381] [2021-01-06 16:52:31,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104846776] [2021-01-06 16:52:31,678 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 16:52:31,785 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:52:31,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:31,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 44 conjunts are in the unsatisfiable core [2021-01-06 16:52:31,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:31,922 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 16:52:31,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:31,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 46 [2021-01-06 16:52:31,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602479132] [2021-01-06 16:52:31,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-01-06 16:52:31,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:31,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-01-06 16:52:31,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 16:52:31,924 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 46 states. [2021-01-06 16:52:32,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:32,034 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2021-01-06 16:52:32,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-06 16:52:32,035 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 86 [2021-01-06 16:52:32,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:32,036 INFO L225 Difference]: With dead ends: 94 [2021-01-06 16:52:32,036 INFO L226 Difference]: Without dead ends: 90 [2021-01-06 16:52:32,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=956, Invalid=1206, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 16:52:32,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-01-06 16:52:32,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2021-01-06 16:52:32,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2021-01-06 16:52:32,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2021-01-06 16:52:32,039 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2021-01-06 16:52:32,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:32,040 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2021-01-06 16:52:32,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2021-01-06 16:52:32,040 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2021-01-06 16:52:32,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-01-06 16:52:32,041 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:32,041 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:32,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:32,254 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:32,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:32,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1006889347, now seen corresponding path program 41 times [2021-01-06 16:52:32,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:32,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398746245] [2021-01-06 16:52:32,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:32,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:33,480 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 16:52:33,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398746245] [2021-01-06 16:52:33,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146278965] [2021-01-06 16:52:33,480 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 16:52:33,627 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2021-01-06 16:52:33,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:33,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 45 conjunts are in the unsatisfiable core [2021-01-06 16:52:33,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:33,773 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 16:52:33,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:33,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 47 [2021-01-06 16:52:33,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109485548] [2021-01-06 16:52:33,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-01-06 16:52:33,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:33,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-01-06 16:52:33,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=995, Invalid=1167, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 16:52:33,775 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 47 states. [2021-01-06 16:52:33,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:33,889 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2021-01-06 16:52:33,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-01-06 16:52:33,889 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 88 [2021-01-06 16:52:33,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:33,890 INFO L225 Difference]: With dead ends: 96 [2021-01-06 16:52:33,890 INFO L226 Difference]: Without dead ends: 92 [2021-01-06 16:52:33,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1000, Invalid=1256, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 16:52:33,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-01-06 16:52:33,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2021-01-06 16:52:33,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2021-01-06 16:52:33,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2021-01-06 16:52:33,894 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2021-01-06 16:52:33,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:33,895 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2021-01-06 16:52:33,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2021-01-06 16:52:33,895 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2021-01-06 16:52:33,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-01-06 16:52:33,895 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:33,896 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:34,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-01-06 16:52:34,109 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:34,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:34,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1199877790, now seen corresponding path program 42 times [2021-01-06 16:52:34,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:34,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389168240] [2021-01-06 16:52:34,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:34,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:35,287 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 16:52:35,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389168240] [2021-01-06 16:52:35,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225944752] [2021-01-06 16:52:35,288 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 16:52:35,446 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2021-01-06 16:52:35,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:35,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 51 conjunts are in the unsatisfiable core [2021-01-06 16:52:35,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:35,603 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 16:52:35,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:35,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 48 [2021-01-06 16:52:35,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490381201] [2021-01-06 16:52:35,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-01-06 16:52:35,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:35,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-01-06 16:52:35,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=1216, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 16:52:35,605 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 48 states. [2021-01-06 16:52:35,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:35,730 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2021-01-06 16:52:35,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-01-06 16:52:35,730 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 90 [2021-01-06 16:52:35,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:35,731 INFO L225 Difference]: With dead ends: 98 [2021-01-06 16:52:35,731 INFO L226 Difference]: Without dead ends: 94 [2021-01-06 16:52:35,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1045, Invalid=1307, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 16:52:35,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-01-06 16:52:35,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2021-01-06 16:52:35,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2021-01-06 16:52:35,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2021-01-06 16:52:35,735 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2021-01-06 16:52:35,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:35,736 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2021-01-06 16:52:35,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2021-01-06 16:52:35,736 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2021-01-06 16:52:35,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-01-06 16:52:35,736 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:35,737 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:35,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:35,951 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:35,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:35,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1978177785, now seen corresponding path program 43 times [2021-01-06 16:52:35,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:35,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623883075] [2021-01-06 16:52:35,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:35,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:37,286 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 16:52:37,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623883075] [2021-01-06 16:52:37,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365082125] [2021-01-06 16:52:37,287 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 16:52:37,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:37,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 47 conjunts are in the unsatisfiable core [2021-01-06 16:52:37,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:37,553 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 16:52:37,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:37,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 49 [2021-01-06 16:52:37,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299334910] [2021-01-06 16:52:37,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-01-06 16:52:37,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:37,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-01-06 16:52:37,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1086, Invalid=1266, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 16:52:37,555 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 49 states. [2021-01-06 16:52:37,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:37,648 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2021-01-06 16:52:37,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-06 16:52:37,648 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 92 [2021-01-06 16:52:37,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:37,649 INFO L225 Difference]: With dead ends: 100 [2021-01-06 16:52:37,649 INFO L226 Difference]: Without dead ends: 96 [2021-01-06 16:52:37,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1091, Invalid=1359, Unknown=0, NotChecked=0, Total=2450 [2021-01-06 16:52:37,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-01-06 16:52:37,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2021-01-06 16:52:37,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2021-01-06 16:52:37,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2021-01-06 16:52:37,653 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2021-01-06 16:52:37,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:37,654 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2021-01-06 16:52:37,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2021-01-06 16:52:37,654 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2021-01-06 16:52:37,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-01-06 16:52:37,654 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:37,655 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:37,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:37,869 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:37,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:37,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1694803820, now seen corresponding path program 44 times [2021-01-06 16:52:37,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:37,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547155982] [2021-01-06 16:52:37,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:37,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:39,161 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 16:52:39,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547155982] [2021-01-06 16:52:39,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860761518] [2021-01-06 16:52:39,162 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 16:52:39,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:52:39,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:39,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 53 conjunts are in the unsatisfiable core [2021-01-06 16:52:39,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:39,441 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 16:52:39,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:39,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 50 [2021-01-06 16:52:39,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788448934] [2021-01-06 16:52:39,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-01-06 16:52:39,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:39,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-01-06 16:52:39,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2021-01-06 16:52:39,443 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 50 states. [2021-01-06 16:52:39,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:39,564 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2021-01-06 16:52:39,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-01-06 16:52:39,565 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 94 [2021-01-06 16:52:39,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:39,566 INFO L225 Difference]: With dead ends: 102 [2021-01-06 16:52:39,566 INFO L226 Difference]: Without dead ends: 98 [2021-01-06 16:52:39,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1138, Invalid=1412, Unknown=0, NotChecked=0, Total=2550 [2021-01-06 16:52:39,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-01-06 16:52:39,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2021-01-06 16:52:39,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2021-01-06 16:52:39,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2021-01-06 16:52:39,571 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2021-01-06 16:52:39,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:39,571 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2021-01-06 16:52:39,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2021-01-06 16:52:39,572 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2021-01-06 16:52:39,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-01-06 16:52:39,572 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:39,572 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:39,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-01-06 16:52:39,787 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:39,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:39,787 INFO L82 PathProgramCache]: Analyzing trace with hash 967008913, now seen corresponding path program 45 times [2021-01-06 16:52:39,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:39,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854703801] [2021-01-06 16:52:39,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:39,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:41,209 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 16:52:41,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854703801] [2021-01-06 16:52:41,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735997748] [2021-01-06 16:52:41,210 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 16:52:41,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2021-01-06 16:52:41,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:41,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 54 conjunts are in the unsatisfiable core [2021-01-06 16:52:41,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:41,558 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 16:52:41,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:41,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 51 [2021-01-06 16:52:41,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147137812] [2021-01-06 16:52:41,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-01-06 16:52:41,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:41,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-01-06 16:52:41,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1181, Invalid=1369, Unknown=0, NotChecked=0, Total=2550 [2021-01-06 16:52:41,561 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 51 states. [2021-01-06 16:52:41,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:41,689 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2021-01-06 16:52:41,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-01-06 16:52:41,692 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 96 [2021-01-06 16:52:41,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:41,693 INFO L225 Difference]: With dead ends: 104 [2021-01-06 16:52:41,693 INFO L226 Difference]: Without dead ends: 100 [2021-01-06 16:52:41,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1186, Invalid=1466, Unknown=0, NotChecked=0, Total=2652 [2021-01-06 16:52:41,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-01-06 16:52:41,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2021-01-06 16:52:41,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2021-01-06 16:52:41,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2021-01-06 16:52:41,698 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2021-01-06 16:52:41,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:41,698 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2021-01-06 16:52:41,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2021-01-06 16:52:41,698 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2021-01-06 16:52:41,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-01-06 16:52:41,699 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:41,699 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:41,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-01-06 16:52:41,913 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:41,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:41,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1635772534, now seen corresponding path program 46 times [2021-01-06 16:52:41,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:41,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031444660] [2021-01-06 16:52:41,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:41,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:43,377 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 16:52:43,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031444660] [2021-01-06 16:52:43,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313103168] [2021-01-06 16:52:43,378 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 16:52:43,509 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:52:43,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:43,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 50 conjunts are in the unsatisfiable core [2021-01-06 16:52:43,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:43,681 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 16:52:43,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:43,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 52 [2021-01-06 16:52:43,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515419872] [2021-01-06 16:52:43,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-01-06 16:52:43,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:43,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-01-06 16:52:43,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1230, Invalid=1422, Unknown=0, NotChecked=0, Total=2652 [2021-01-06 16:52:43,683 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 52 states. [2021-01-06 16:52:43,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:43,806 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2021-01-06 16:52:43,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-01-06 16:52:43,807 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 98 [2021-01-06 16:52:43,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:43,808 INFO L225 Difference]: With dead ends: 106 [2021-01-06 16:52:43,808 INFO L226 Difference]: Without dead ends: 102 [2021-01-06 16:52:43,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1235, Invalid=1521, Unknown=0, NotChecked=0, Total=2756 [2021-01-06 16:52:43,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-01-06 16:52:43,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2021-01-06 16:52:43,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2021-01-06 16:52:43,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2021-01-06 16:52:43,812 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2021-01-06 16:52:43,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:43,813 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2021-01-06 16:52:43,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2021-01-06 16:52:43,813 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2021-01-06 16:52:43,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-01-06 16:52:43,814 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:43,814 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:44,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-01-06 16:52:44,029 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:44,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:44,030 INFO L82 PathProgramCache]: Analyzing trace with hash 72517915, now seen corresponding path program 47 times [2021-01-06 16:52:44,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:44,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725434152] [2021-01-06 16:52:44,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:44,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:45,592 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 16:52:45,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725434152] [2021-01-06 16:52:45,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724021166] [2021-01-06 16:52:45,592 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 16:52:45,760 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2021-01-06 16:52:45,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:45,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 51 conjunts are in the unsatisfiable core [2021-01-06 16:52:45,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:45,926 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 16:52:45,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:45,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 53 [2021-01-06 16:52:45,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132082819] [2021-01-06 16:52:45,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-01-06 16:52:45,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:45,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-01-06 16:52:45,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1280, Invalid=1476, Unknown=0, NotChecked=0, Total=2756 [2021-01-06 16:52:45,928 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 53 states. [2021-01-06 16:52:46,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:46,081 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2021-01-06 16:52:46,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-01-06 16:52:46,082 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 100 [2021-01-06 16:52:46,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:46,084 INFO L225 Difference]: With dead ends: 108 [2021-01-06 16:52:46,084 INFO L226 Difference]: Without dead ends: 104 [2021-01-06 16:52:46,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1285, Invalid=1577, Unknown=0, NotChecked=0, Total=2862 [2021-01-06 16:52:46,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-01-06 16:52:46,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2021-01-06 16:52:46,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2021-01-06 16:52:46,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2021-01-06 16:52:46,088 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2021-01-06 16:52:46,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:46,089 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2021-01-06 16:52:46,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2021-01-06 16:52:46,089 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2021-01-06 16:52:46,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-01-06 16:52:46,089 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:46,090 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:46,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:46,304 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:46,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:46,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1023382656, now seen corresponding path program 48 times [2021-01-06 16:52:46,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:46,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132318526] [2021-01-06 16:52:46,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:46,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:47,897 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 16:52:47,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132318526] [2021-01-06 16:52:47,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238430191] [2021-01-06 16:52:47,897 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 16:52:48,068 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2021-01-06 16:52:48,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:48,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 57 conjunts are in the unsatisfiable core [2021-01-06 16:52:48,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:48,247 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 16:52:48,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:48,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 54 [2021-01-06 16:52:48,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499268333] [2021-01-06 16:52:48,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-01-06 16:52:48,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:48,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-01-06 16:52:48,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2021-01-06 16:52:48,249 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 54 states. [2021-01-06 16:52:48,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:48,409 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2021-01-06 16:52:48,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-01-06 16:52:48,409 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 102 [2021-01-06 16:52:48,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:48,411 INFO L225 Difference]: With dead ends: 110 [2021-01-06 16:52:48,411 INFO L226 Difference]: Without dead ends: 106 [2021-01-06 16:52:48,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1336, Invalid=1634, Unknown=0, NotChecked=0, Total=2970 [2021-01-06 16:52:48,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-01-06 16:52:48,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2021-01-06 16:52:48,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2021-01-06 16:52:48,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2021-01-06 16:52:48,416 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2021-01-06 16:52:48,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:48,416 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2021-01-06 16:52:48,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2021-01-06 16:52:48,416 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2021-01-06 16:52:48,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-01-06 16:52:48,417 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:48,417 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:48,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-01-06 16:52:48,632 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:48,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:48,632 INFO L82 PathProgramCache]: Analyzing trace with hash -23635291, now seen corresponding path program 49 times [2021-01-06 16:52:48,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:48,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108114815] [2021-01-06 16:52:48,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:48,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:50,271 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 16:52:50,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108114815] [2021-01-06 16:52:50,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777476043] [2021-01-06 16:52:50,272 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 16:52:50,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:50,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 53 conjunts are in the unsatisfiable core [2021-01-06 16:52:50,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:50,579 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 16:52:50,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:50,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 55 [2021-01-06 16:52:50,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573352410] [2021-01-06 16:52:50,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-01-06 16:52:50,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:50,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-01-06 16:52:50,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1383, Invalid=1587, Unknown=0, NotChecked=0, Total=2970 [2021-01-06 16:52:50,581 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 55 states. [2021-01-06 16:52:50,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:50,710 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2021-01-06 16:52:50,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-01-06 16:52:50,710 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 104 [2021-01-06 16:52:50,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:50,712 INFO L225 Difference]: With dead ends: 112 [2021-01-06 16:52:50,712 INFO L226 Difference]: Without dead ends: 108 [2021-01-06 16:52:50,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1388, Invalid=1692, Unknown=0, NotChecked=0, Total=3080 [2021-01-06 16:52:50,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-01-06 16:52:50,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2021-01-06 16:52:50,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2021-01-06 16:52:50,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2021-01-06 16:52:50,717 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2021-01-06 16:52:50,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:50,717 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2021-01-06 16:52:50,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2021-01-06 16:52:50,717 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2021-01-06 16:52:50,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-01-06 16:52:50,718 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:50,718 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:50,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:50,932 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:50,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:50,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1185535094, now seen corresponding path program 50 times [2021-01-06 16:52:50,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:50,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015847545] [2021-01-06 16:52:50,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:50,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:52,580 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 16:52:52,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015847545] [2021-01-06 16:52:52,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47719402] [2021-01-06 16:52:52,581 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 16:52:52,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:52:52,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:52,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 59 conjunts are in the unsatisfiable core [2021-01-06 16:52:52,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:52,913 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 16:52:52,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:52,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 56 [2021-01-06 16:52:52,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112876780] [2021-01-06 16:52:52,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-01-06 16:52:52,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:52,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-01-06 16:52:52,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1436, Invalid=1644, Unknown=0, NotChecked=0, Total=3080 [2021-01-06 16:52:52,915 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 56 states. [2021-01-06 16:52:53,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:53,077 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2021-01-06 16:52:53,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-01-06 16:52:53,077 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 106 [2021-01-06 16:52:53,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:53,079 INFO L225 Difference]: With dead ends: 114 [2021-01-06 16:52:53,079 INFO L226 Difference]: Without dead ends: 110 [2021-01-06 16:52:53,079 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1441, Invalid=1751, Unknown=0, NotChecked=0, Total=3192 [2021-01-06 16:52:53,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-01-06 16:52:53,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2021-01-06 16:52:53,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2021-01-06 16:52:53,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2021-01-06 16:52:53,083 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2021-01-06 16:52:53,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:53,083 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2021-01-06 16:52:53,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2021-01-06 16:52:53,084 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2021-01-06 16:52:53,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-01-06 16:52:53,084 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:53,084 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:53,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:53,291 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:53,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:53,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1079748817, now seen corresponding path program 51 times [2021-01-06 16:52:53,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:53,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284299719] [2021-01-06 16:52:53,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:53,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:54,954 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 16:52:54,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284299719] [2021-01-06 16:52:54,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549891684] [2021-01-06 16:52:54,955 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 16:52:55,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2021-01-06 16:52:55,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:55,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 60 conjunts are in the unsatisfiable core [2021-01-06 16:52:55,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:55,327 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 16:52:55,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:55,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 57 [2021-01-06 16:52:55,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086970820] [2021-01-06 16:52:55,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-01-06 16:52:55,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:55,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-01-06 16:52:55,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1490, Invalid=1702, Unknown=0, NotChecked=0, Total=3192 [2021-01-06 16:52:55,329 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 57 states. [2021-01-06 16:52:55,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:55,465 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2021-01-06 16:52:55,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-01-06 16:52:55,466 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 108 [2021-01-06 16:52:55,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:55,467 INFO L225 Difference]: With dead ends: 116 [2021-01-06 16:52:55,467 INFO L226 Difference]: Without dead ends: 112 [2021-01-06 16:52:55,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1495, Invalid=1811, Unknown=0, NotChecked=0, Total=3306 [2021-01-06 16:52:55,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-01-06 16:52:55,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2021-01-06 16:52:55,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2021-01-06 16:52:55,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2021-01-06 16:52:55,470 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2021-01-06 16:52:55,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:55,471 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2021-01-06 16:52:55,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2021-01-06 16:52:55,471 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2021-01-06 16:52:55,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-01-06 16:52:55,471 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:55,471 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:55,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-01-06 16:52:55,672 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:55,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:55,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1796615572, now seen corresponding path program 52 times [2021-01-06 16:52:55,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:55,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535375598] [2021-01-06 16:52:55,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:55,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:57,496 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 16:52:57,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535375598] [2021-01-06 16:52:57,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261247859] [2021-01-06 16:52:57,497 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 16:52:57,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:52:57,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:57,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 56 conjunts are in the unsatisfiable core [2021-01-06 16:52:57,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:57,817 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 16:52:57,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:57,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 58 [2021-01-06 16:52:57,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699024253] [2021-01-06 16:52:57,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-01-06 16:52:57,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:57,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-01-06 16:52:57,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1545, Invalid=1761, Unknown=0, NotChecked=0, Total=3306 [2021-01-06 16:52:57,820 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 58 states. [2021-01-06 16:52:57,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:57,985 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2021-01-06 16:52:57,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-01-06 16:52:57,986 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 110 [2021-01-06 16:52:57,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:57,987 INFO L225 Difference]: With dead ends: 118 [2021-01-06 16:52:57,987 INFO L226 Difference]: Without dead ends: 114 [2021-01-06 16:52:57,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1550, Invalid=1872, Unknown=0, NotChecked=0, Total=3422 [2021-01-06 16:52:57,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-01-06 16:52:57,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2021-01-06 16:52:57,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2021-01-06 16:52:57,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2021-01-06 16:52:57,993 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2021-01-06 16:52:57,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:57,993 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2021-01-06 16:52:57,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2021-01-06 16:52:57,994 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2021-01-06 16:52:57,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-01-06 16:52:57,994 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:57,994 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:58,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:58,208 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:58,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:58,208 INFO L82 PathProgramCache]: Analyzing trace with hash 23854777, now seen corresponding path program 53 times [2021-01-06 16:52:58,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:58,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397254152] [2021-01-06 16:52:58,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:58,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:00,179 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 16:53:00,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397254152] [2021-01-06 16:53:00,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59302237] [2021-01-06 16:53:00,179 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 16:53:00,354 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2021-01-06 16:53:00,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:00,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 57 conjunts are in the unsatisfiable core [2021-01-06 16:53:00,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:00,536 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 16:53:00,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:00,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 59 [2021-01-06 16:53:00,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811047258] [2021-01-06 16:53:00,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-01-06 16:53:00,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:00,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-01-06 16:53:00,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1601, Invalid=1821, Unknown=0, NotChecked=0, Total=3422 [2021-01-06 16:53:00,539 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 59 states. [2021-01-06 16:53:00,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:00,696 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2021-01-06 16:53:00,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-01-06 16:53:00,697 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 112 [2021-01-06 16:53:00,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:00,699 INFO L225 Difference]: With dead ends: 120 [2021-01-06 16:53:00,699 INFO L226 Difference]: Without dead ends: 116 [2021-01-06 16:53:00,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1606, Invalid=1934, Unknown=0, NotChecked=0, Total=3540 [2021-01-06 16:53:00,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-01-06 16:53:00,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2021-01-06 16:53:00,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2021-01-06 16:53:00,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2021-01-06 16:53:00,703 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2021-01-06 16:53:00,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:00,703 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2021-01-06 16:53:00,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2021-01-06 16:53:00,704 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2021-01-06 16:53:00,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-01-06 16:53:00,704 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:00,704 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:00,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-01-06 16:53:00,920 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:00,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:00,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1502747294, now seen corresponding path program 54 times [2021-01-06 16:53:00,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:00,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60521960] [2021-01-06 16:53:00,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:00,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:02,905 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 16:53:02,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60521960] [2021-01-06 16:53:02,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515641300] [2021-01-06 16:53:02,906 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 16:53:03,117 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2021-01-06 16:53:03,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:03,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 63 conjunts are in the unsatisfiable core [2021-01-06 16:53:03,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:03,310 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 16:53:03,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:03,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 60 [2021-01-06 16:53:03,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782060106] [2021-01-06 16:53:03,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-01-06 16:53:03,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:03,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-01-06 16:53:03,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1658, Invalid=1882, Unknown=0, NotChecked=0, Total=3540 [2021-01-06 16:53:03,314 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 60 states. [2021-01-06 16:53:03,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:03,454 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2021-01-06 16:53:03,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-01-06 16:53:03,454 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 114 [2021-01-06 16:53:03,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:03,455 INFO L225 Difference]: With dead ends: 122 [2021-01-06 16:53:03,456 INFO L226 Difference]: Without dead ends: 118 [2021-01-06 16:53:03,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1663, Invalid=1997, Unknown=0, NotChecked=0, Total=3660 [2021-01-06 16:53:03,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-01-06 16:53:03,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2021-01-06 16:53:03,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2021-01-06 16:53:03,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2021-01-06 16:53:03,460 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2021-01-06 16:53:03,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:03,460 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2021-01-06 16:53:03,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2021-01-06 16:53:03,460 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2021-01-06 16:53:03,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-01-06 16:53:03,461 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:03,461 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:03,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-01-06 16:53:03,676 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:03,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:03,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1084281155, now seen corresponding path program 55 times [2021-01-06 16:53:03,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:03,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511874216] [2021-01-06 16:53:03,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:03,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:05,737 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 16:53:05,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511874216] [2021-01-06 16:53:05,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892871009] [2021-01-06 16:53:05,738 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 16:53:05,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:05,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 642 conjuncts, 59 conjunts are in the unsatisfiable core [2021-01-06 16:53:05,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:06,047 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 16:53:06,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:06,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 61 [2021-01-06 16:53:06,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136928417] [2021-01-06 16:53:06,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-01-06 16:53:06,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:06,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-01-06 16:53:06,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1716, Invalid=1944, Unknown=0, NotChecked=0, Total=3660 [2021-01-06 16:53:06,049 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 61 states. [2021-01-06 16:53:06,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:06,221 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2021-01-06 16:53:06,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-01-06 16:53:06,222 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 116 [2021-01-06 16:53:06,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:06,223 INFO L225 Difference]: With dead ends: 124 [2021-01-06 16:53:06,223 INFO L226 Difference]: Without dead ends: 120 [2021-01-06 16:53:06,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1721, Invalid=2061, Unknown=0, NotChecked=0, Total=3782 [2021-01-06 16:53:06,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-01-06 16:53:06,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2021-01-06 16:53:06,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2021-01-06 16:53:06,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2021-01-06 16:53:06,228 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2021-01-06 16:53:06,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:06,229 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2021-01-06 16:53:06,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2021-01-06 16:53:06,229 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2021-01-06 16:53:06,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-01-06 16:53:06,229 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:06,230 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:06,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:06,445 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:06,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:06,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1629719896, now seen corresponding path program 56 times [2021-01-06 16:53:06,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:06,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590192436] [2021-01-06 16:53:06,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:06,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:08,566 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 16:53:08,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590192436] [2021-01-06 16:53:08,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312704846] [2021-01-06 16:53:08,567 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 16:53:08,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:53:08,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:08,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 65 conjunts are in the unsatisfiable core [2021-01-06 16:53:08,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:08,904 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 16:53:08,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:08,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 62 [2021-01-06 16:53:08,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148218930] [2021-01-06 16:53:08,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-01-06 16:53:08,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:08,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-01-06 16:53:08,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1775, Invalid=2007, Unknown=0, NotChecked=0, Total=3782 [2021-01-06 16:53:08,906 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 62 states. [2021-01-06 16:53:09,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:09,080 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2021-01-06 16:53:09,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-01-06 16:53:09,081 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 118 [2021-01-06 16:53:09,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:09,082 INFO L225 Difference]: With dead ends: 126 [2021-01-06 16:53:09,082 INFO L226 Difference]: Without dead ends: 122 [2021-01-06 16:53:09,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1780, Invalid=2126, Unknown=0, NotChecked=0, Total=3906 [2021-01-06 16:53:09,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-01-06 16:53:09,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2021-01-06 16:53:09,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2021-01-06 16:53:09,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2021-01-06 16:53:09,085 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2021-01-06 16:53:09,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:09,085 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2021-01-06 16:53:09,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2021-01-06 16:53:09,085 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2021-01-06 16:53:09,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-01-06 16:53:09,086 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:09,086 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:09,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-01-06 16:53:09,287 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:09,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:09,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1555386061, now seen corresponding path program 57 times [2021-01-06 16:53:09,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:09,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977464415] [2021-01-06 16:53:09,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:09,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:11,499 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 16:53:11,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977464415] [2021-01-06 16:53:11,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659039677] [2021-01-06 16:53:11,500 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 16:53:11,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2021-01-06 16:53:11,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:11,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 66 conjunts are in the unsatisfiable core [2021-01-06 16:53:11,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:11,927 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 16:53:11,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:11,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 63 [2021-01-06 16:53:11,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771596223] [2021-01-06 16:53:11,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-01-06 16:53:11,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:11,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-01-06 16:53:11,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1835, Invalid=2071, Unknown=0, NotChecked=0, Total=3906 [2021-01-06 16:53:11,929 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 63 states. [2021-01-06 16:53:12,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:12,072 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2021-01-06 16:53:12,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-01-06 16:53:12,074 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 120 [2021-01-06 16:53:12,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:12,075 INFO L225 Difference]: With dead ends: 128 [2021-01-06 16:53:12,075 INFO L226 Difference]: Without dead ends: 124 [2021-01-06 16:53:12,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1840, Invalid=2192, Unknown=0, NotChecked=0, Total=4032 [2021-01-06 16:53:12,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-01-06 16:53:12,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2021-01-06 16:53:12,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2021-01-06 16:53:12,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2021-01-06 16:53:12,079 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2021-01-06 16:53:12,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:12,079 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2021-01-06 16:53:12,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2021-01-06 16:53:12,079 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2021-01-06 16:53:12,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-01-06 16:53:12,080 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:12,080 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:12,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:12,294 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:12,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:12,294 INFO L82 PathProgramCache]: Analyzing trace with hash 130528690, now seen corresponding path program 58 times [2021-01-06 16:53:12,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:12,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135752655] [2021-01-06 16:53:12,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:12,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:14,612 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 16:53:14,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135752655] [2021-01-06 16:53:14,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101512764] [2021-01-06 16:53:14,612 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 16:53:14,757 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:53:14,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:14,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 62 conjunts are in the unsatisfiable core [2021-01-06 16:53:14,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:14,947 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 16:53:14,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:14,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 64 [2021-01-06 16:53:14,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946768737] [2021-01-06 16:53:14,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2021-01-06 16:53:14,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:14,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-01-06 16:53:14,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1896, Invalid=2136, Unknown=0, NotChecked=0, Total=4032 [2021-01-06 16:53:14,949 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 64 states. [2021-01-06 16:53:15,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:15,095 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2021-01-06 16:53:15,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-01-06 16:53:15,095 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 122 [2021-01-06 16:53:15,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:15,097 INFO L225 Difference]: With dead ends: 130 [2021-01-06 16:53:15,097 INFO L226 Difference]: Without dead ends: 126 [2021-01-06 16:53:15,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1901, Invalid=2259, Unknown=0, NotChecked=0, Total=4160 [2021-01-06 16:53:15,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-01-06 16:53:15,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2021-01-06 16:53:15,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2021-01-06 16:53:15,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2021-01-06 16:53:15,101 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2021-01-06 16:53:15,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:15,102 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2021-01-06 16:53:15,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2021-01-06 16:53:15,102 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2021-01-06 16:53:15,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-01-06 16:53:15,102 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:15,103 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:15,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-01-06 16:53:15,315 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:15,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:15,315 INFO L82 PathProgramCache]: Analyzing trace with hash 937162583, now seen corresponding path program 59 times [2021-01-06 16:53:15,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:15,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771086165] [2021-01-06 16:53:15,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:15,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:17,727 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 16:53:17,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771086165] [2021-01-06 16:53:17,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109516279] [2021-01-06 16:53:17,728 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 16:53:17,924 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2021-01-06 16:53:17,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:17,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 686 conjuncts, 63 conjunts are in the unsatisfiable core [2021-01-06 16:53:17,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:18,131 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 16:53:18,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:18,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 65 [2021-01-06 16:53:18,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591684584] [2021-01-06 16:53:18,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2021-01-06 16:53:18,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:18,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-01-06 16:53:18,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1958, Invalid=2202, Unknown=0, NotChecked=0, Total=4160 [2021-01-06 16:53:18,133 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 65 states. [2021-01-06 16:53:18,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:18,330 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2021-01-06 16:53:18,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-01-06 16:53:18,330 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 124 [2021-01-06 16:53:18,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:18,332 INFO L225 Difference]: With dead ends: 132 [2021-01-06 16:53:18,332 INFO L226 Difference]: Without dead ends: 128 [2021-01-06 16:53:18,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1963, Invalid=2327, Unknown=0, NotChecked=0, Total=4290 [2021-01-06 16:53:18,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-01-06 16:53:18,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2021-01-06 16:53:18,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2021-01-06 16:53:18,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2021-01-06 16:53:18,336 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2021-01-06 16:53:18,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:18,337 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2021-01-06 16:53:18,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2021-01-06 16:53:18,337 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2021-01-06 16:53:18,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-01-06 16:53:18,338 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:18,338 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:18,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:18,552 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:18,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:18,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1276746820, now seen corresponding path program 60 times [2021-01-06 16:53:18,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:18,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402136341] [2021-01-06 16:53:18,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:18,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:21,005 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 16:53:21,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402136341] [2021-01-06 16:53:21,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978510264] [2021-01-06 16:53:21,005 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 16:53:21,225 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2021-01-06 16:53:21,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:21,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 69 conjunts are in the unsatisfiable core [2021-01-06 16:53:21,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:21,440 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 16:53:21,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:21,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 66 [2021-01-06 16:53:21,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110927979] [2021-01-06 16:53:21,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-01-06 16:53:21,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:21,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-01-06 16:53:21,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2021, Invalid=2269, Unknown=0, NotChecked=0, Total=4290 [2021-01-06 16:53:21,442 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 66 states. [2021-01-06 16:53:21,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:21,628 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2021-01-06 16:53:21,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-01-06 16:53:21,629 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 126 [2021-01-06 16:53:21,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:21,630 INFO L225 Difference]: With dead ends: 134 [2021-01-06 16:53:21,630 INFO L226 Difference]: Without dead ends: 130 [2021-01-06 16:53:21,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2026, Invalid=2396, Unknown=0, NotChecked=0, Total=4422 [2021-01-06 16:53:21,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-01-06 16:53:21,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2021-01-06 16:53:21,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2021-01-06 16:53:21,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2021-01-06 16:53:21,636 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2021-01-06 16:53:21,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:21,636 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2021-01-06 16:53:21,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2021-01-06 16:53:21,637 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2021-01-06 16:53:21,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-01-06 16:53:21,637 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:21,637 INFO L422 BasicCegarLoop]: trace histogram [61, 61, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:21,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-01-06 16:53:21,852 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:21,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:21,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1460095713, now seen corresponding path program 61 times [2021-01-06 16:53:21,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:21,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257894763] [2021-01-06 16:53:21,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:21,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:24,386 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 16:53:24,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257894763] [2021-01-06 16:53:24,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042878982] [2021-01-06 16:53:24,386 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 16:53:24,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:24,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 65 conjunts are in the unsatisfiable core [2021-01-06 16:53:24,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:24,749 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 16:53:24,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:24,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 67 [2021-01-06 16:53:24,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538216104] [2021-01-06 16:53:24,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2021-01-06 16:53:24,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:24,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-01-06 16:53:24,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2085, Invalid=2337, Unknown=0, NotChecked=0, Total=4422 [2021-01-06 16:53:24,752 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 67 states. [2021-01-06 16:53:24,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:24,931 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2021-01-06 16:53:24,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-01-06 16:53:24,931 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 128 [2021-01-06 16:53:24,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:24,933 INFO L225 Difference]: With dead ends: 136 [2021-01-06 16:53:24,933 INFO L226 Difference]: Without dead ends: 132 [2021-01-06 16:53:24,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2090, Invalid=2466, Unknown=0, NotChecked=0, Total=4556 [2021-01-06 16:53:24,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-01-06 16:53:24,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2021-01-06 16:53:24,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2021-01-06 16:53:24,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2021-01-06 16:53:24,938 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2021-01-06 16:53:24,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:24,938 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2021-01-06 16:53:24,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2021-01-06 16:53:24,938 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2021-01-06 16:53:24,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-01-06 16:53:24,939 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:24,939 INFO L422 BasicCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:25,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:25,154 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:25,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:25,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1249182522, now seen corresponding path program 62 times [2021-01-06 16:53:25,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:25,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363776754] [2021-01-06 16:53:25,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:25,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:27,739 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 16:53:27,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363776754] [2021-01-06 16:53:27,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676106469] [2021-01-06 16:53:27,739 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 16:53:27,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:53:27,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:27,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 719 conjuncts, 71 conjunts are in the unsatisfiable core [2021-01-06 16:53:27,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:28,114 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 16:53:28,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:28,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 68 [2021-01-06 16:53:28,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268727326] [2021-01-06 16:53:28,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2021-01-06 16:53:28,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:28,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-01-06 16:53:28,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2150, Invalid=2406, Unknown=0, NotChecked=0, Total=4556 [2021-01-06 16:53:28,116 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 68 states. [2021-01-06 16:53:28,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:28,319 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2021-01-06 16:53:28,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-01-06 16:53:28,320 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 130 [2021-01-06 16:53:28,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:28,321 INFO L225 Difference]: With dead ends: 138 [2021-01-06 16:53:28,321 INFO L226 Difference]: Without dead ends: 134 [2021-01-06 16:53:28,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2155, Invalid=2537, Unknown=0, NotChecked=0, Total=4692 [2021-01-06 16:53:28,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-01-06 16:53:28,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2021-01-06 16:53:28,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2021-01-06 16:53:28,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2021-01-06 16:53:28,325 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2021-01-06 16:53:28,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:28,325 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2021-01-06 16:53:28,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2021-01-06 16:53:28,325 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2021-01-06 16:53:28,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-01-06 16:53:28,326 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:28,326 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:28,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-01-06 16:53:28,541 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:28,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:28,542 INFO L82 PathProgramCache]: Analyzing trace with hash -2115384981, now seen corresponding path program 63 times [2021-01-06 16:53:28,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:28,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350738757] [2021-01-06 16:53:28,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:28,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:31,241 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 16:53:31,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350738757] [2021-01-06 16:53:31,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243295702] [2021-01-06 16:53:31,242 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 16:53:31,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2021-01-06 16:53:31,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:31,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 72 conjunts are in the unsatisfiable core [2021-01-06 16:53:31,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:31,697 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 16:53:31,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:31,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 69 [2021-01-06 16:53:31,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840313420] [2021-01-06 16:53:31,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-01-06 16:53:31,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:31,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-01-06 16:53:31,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2216, Invalid=2476, Unknown=0, NotChecked=0, Total=4692 [2021-01-06 16:53:31,699 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 69 states. [2021-01-06 16:53:31,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:31,924 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2021-01-06 16:53:31,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-01-06 16:53:31,925 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 132 [2021-01-06 16:53:31,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:31,926 INFO L225 Difference]: With dead ends: 140 [2021-01-06 16:53:31,926 INFO L226 Difference]: Without dead ends: 136 [2021-01-06 16:53:31,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2221, Invalid=2609, Unknown=0, NotChecked=0, Total=4830 [2021-01-06 16:53:31,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-01-06 16:53:31,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2021-01-06 16:53:31,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2021-01-06 16:53:31,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2021-01-06 16:53:31,931 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2021-01-06 16:53:31,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:31,931 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2021-01-06 16:53:31,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2021-01-06 16:53:31,931 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2021-01-06 16:53:31,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-01-06 16:53:31,932 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:31,932 INFO L422 BasicCegarLoop]: trace histogram [64, 64, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:32,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:32,146 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:32,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:32,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1312292656, now seen corresponding path program 64 times [2021-01-06 16:53:32,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:32,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185620351] [2021-01-06 16:53:32,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:32,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:34,951 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 16:53:34,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185620351] [2021-01-06 16:53:34,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618934770] [2021-01-06 16:53:34,952 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 16:53:35,107 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:53:35,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:35,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 68 conjunts are in the unsatisfiable core [2021-01-06 16:53:35,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:35,342 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 16:53:35,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:35,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 70 [2021-01-06 16:53:35,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854540181] [2021-01-06 16:53:35,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-01-06 16:53:35,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:35,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-01-06 16:53:35,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2283, Invalid=2547, Unknown=0, NotChecked=0, Total=4830 [2021-01-06 16:53:35,346 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 70 states. [2021-01-06 16:53:35,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:35,581 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2021-01-06 16:53:35,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-01-06 16:53:35,581 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 134 [2021-01-06 16:53:35,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:35,584 INFO L225 Difference]: With dead ends: 142 [2021-01-06 16:53:35,584 INFO L226 Difference]: Without dead ends: 138 [2021-01-06 16:53:35,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2288, Invalid=2682, Unknown=0, NotChecked=0, Total=4970 [2021-01-06 16:53:35,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-01-06 16:53:35,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2021-01-06 16:53:35,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2021-01-06 16:53:35,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2021-01-06 16:53:35,589 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2021-01-06 16:53:35,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:35,590 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2021-01-06 16:53:35,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2021-01-06 16:53:35,590 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2021-01-06 16:53:35,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-01-06 16:53:35,591 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:35,591 INFO L422 BasicCegarLoop]: trace histogram [65, 65, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:35,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-01-06 16:53:35,807 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:35,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:35,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1660285685, now seen corresponding path program 65 times [2021-01-06 16:53:35,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:35,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049742431] [2021-01-06 16:53:35,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:35,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:38,662 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 16:53:38,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049742431] [2021-01-06 16:53:38,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376567960] [2021-01-06 16:53:38,663 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 16:53:38,872 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2021-01-06 16:53:38,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:38,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 69 conjunts are in the unsatisfiable core [2021-01-06 16:53:38,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:39,094 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 16:53:39,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:39,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 71 [2021-01-06 16:53:39,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160417248] [2021-01-06 16:53:39,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-01-06 16:53:39,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:39,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-01-06 16:53:39,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2351, Invalid=2619, Unknown=0, NotChecked=0, Total=4970 [2021-01-06 16:53:39,096 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 71 states. [2021-01-06 16:53:39,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:39,283 INFO L93 Difference]: Finished difference Result 144 states and 144 transitions. [2021-01-06 16:53:39,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-01-06 16:53:39,283 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 136 [2021-01-06 16:53:39,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:39,284 INFO L225 Difference]: With dead ends: 144 [2021-01-06 16:53:39,284 INFO L226 Difference]: Without dead ends: 140 [2021-01-06 16:53:39,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2356, Invalid=2756, Unknown=0, NotChecked=0, Total=5112 [2021-01-06 16:53:39,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-01-06 16:53:39,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2021-01-06 16:53:39,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2021-01-06 16:53:39,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2021-01-06 16:53:39,289 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2021-01-06 16:53:39,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:39,289 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2021-01-06 16:53:39,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2021-01-06 16:53:39,289 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2021-01-06 16:53:39,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-01-06 16:53:39,290 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:39,290 INFO L422 BasicCegarLoop]: trace histogram [66, 66, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:39,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-01-06 16:53:39,504 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:39,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:39,505 INFO L82 PathProgramCache]: Analyzing trace with hash -2140147750, now seen corresponding path program 66 times [2021-01-06 16:53:39,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:39,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026394898] [2021-01-06 16:53:39,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:39,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:42,432 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 16:53:42,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026394898] [2021-01-06 16:53:42,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770546296] [2021-01-06 16:53:42,432 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 16:53:42,686 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2021-01-06 16:53:42,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:42,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 75 conjunts are in the unsatisfiable core [2021-01-06 16:53:42,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:42,898 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 16:53:42,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:42,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 72 [2021-01-06 16:53:42,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836492471] [2021-01-06 16:53:42,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-01-06 16:53:42,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:42,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-01-06 16:53:42,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2420, Invalid=2692, Unknown=0, NotChecked=0, Total=5112 [2021-01-06 16:53:42,900 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 72 states. [2021-01-06 16:53:43,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:43,093 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2021-01-06 16:53:43,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-01-06 16:53:43,094 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 138 [2021-01-06 16:53:43,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:43,095 INFO L225 Difference]: With dead ends: 146 [2021-01-06 16:53:43,095 INFO L226 Difference]: Without dead ends: 142 [2021-01-06 16:53:43,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2425, Invalid=2831, Unknown=0, NotChecked=0, Total=5256 [2021-01-06 16:53:43,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-01-06 16:53:43,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2021-01-06 16:53:43,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2021-01-06 16:53:43,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2021-01-06 16:53:43,100 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2021-01-06 16:53:43,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:43,100 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2021-01-06 16:53:43,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2021-01-06 16:53:43,100 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2021-01-06 16:53:43,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-01-06 16:53:43,101 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:43,101 INFO L422 BasicCegarLoop]: trace histogram [67, 67, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:43,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-01-06 16:53:43,305 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:43,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:43,306 INFO L82 PathProgramCache]: Analyzing trace with hash 660490111, now seen corresponding path program 67 times [2021-01-06 16:53:43,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:43,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605497684] [2021-01-06 16:53:43,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:43,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:46,359 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 16:53:46,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605497684] [2021-01-06 16:53:46,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836458574] [2021-01-06 16:53:46,360 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 16:53:46,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:46,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 71 conjunts are in the unsatisfiable core [2021-01-06 16:53:46,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:46,757 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 16:53:46,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:46,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 73 [2021-01-06 16:53:46,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947845912] [2021-01-06 16:53:46,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 73 states [2021-01-06 16:53:46,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:46,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-01-06 16:53:46,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2490, Invalid=2766, Unknown=0, NotChecked=0, Total=5256 [2021-01-06 16:53:46,759 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 73 states. [2021-01-06 16:53:46,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:46,981 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2021-01-06 16:53:46,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-01-06 16:53:46,981 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 140 [2021-01-06 16:53:46,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:46,982 INFO L225 Difference]: With dead ends: 148 [2021-01-06 16:53:46,982 INFO L226 Difference]: Without dead ends: 144 [2021-01-06 16:53:46,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2495, Invalid=2907, Unknown=0, NotChecked=0, Total=5402 [2021-01-06 16:53:46,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-01-06 16:53:46,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2021-01-06 16:53:46,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2021-01-06 16:53:46,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2021-01-06 16:53:46,986 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2021-01-06 16:53:46,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:46,986 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2021-01-06 16:53:46,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2021-01-06 16:53:46,986 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2021-01-06 16:53:46,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-01-06 16:53:46,986 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:46,986 INFO L422 BasicCegarLoop]: trace histogram [68, 68, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:47,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:47,187 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:47,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:47,188 INFO L82 PathProgramCache]: Analyzing trace with hash -871020060, now seen corresponding path program 68 times [2021-01-06 16:53:47,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:47,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794216918] [2021-01-06 16:53:47,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:47,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:50,235 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 16:53:50,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794216918] [2021-01-06 16:53:50,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30255019] [2021-01-06 16:53:50,236 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 16:53:50,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:53:50,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:50,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 785 conjuncts, 77 conjunts are in the unsatisfiable core [2021-01-06 16:53:50,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:50,652 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 16:53:50,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:50,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 74 [2021-01-06 16:53:50,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141271649] [2021-01-06 16:53:50,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2021-01-06 16:53:50,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:50,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-01-06 16:53:50,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2561, Invalid=2841, Unknown=0, NotChecked=0, Total=5402 [2021-01-06 16:53:50,655 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 74 states. [2021-01-06 16:53:50,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:50,896 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2021-01-06 16:53:50,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-01-06 16:53:50,897 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 142 [2021-01-06 16:53:50,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:50,898 INFO L225 Difference]: With dead ends: 150 [2021-01-06 16:53:50,898 INFO L226 Difference]: Without dead ends: 146 [2021-01-06 16:53:50,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2566, Invalid=2984, Unknown=0, NotChecked=0, Total=5550 [2021-01-06 16:53:50,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-01-06 16:53:50,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2021-01-06 16:53:50,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2021-01-06 16:53:50,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2021-01-06 16:53:50,901 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2021-01-06 16:53:50,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:50,902 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2021-01-06 16:53:50,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2021-01-06 16:53:50,902 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2021-01-06 16:53:50,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-01-06 16:53:50,903 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:50,903 INFO L422 BasicCegarLoop]: trace histogram [69, 69, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:51,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-01-06 16:53:51,119 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:51,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:51,120 INFO L82 PathProgramCache]: Analyzing trace with hash 521488137, now seen corresponding path program 69 times [2021-01-06 16:53:51,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:51,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925892031] [2021-01-06 16:53:51,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:51,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:54,365 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 16:53:54,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925892031] [2021-01-06 16:53:54,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653573296] [2021-01-06 16:53:54,365 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 16:53:54,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2021-01-06 16:53:54,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:54,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 796 conjuncts, 78 conjunts are in the unsatisfiable core [2021-01-06 16:53:54,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:54,888 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 16:53:54,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:54,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 75 [2021-01-06 16:53:54,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927009285] [2021-01-06 16:53:54,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2021-01-06 16:53:54,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:54,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-01-06 16:53:54,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2633, Invalid=2917, Unknown=0, NotChecked=0, Total=5550 [2021-01-06 16:53:54,890 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 75 states. [2021-01-06 16:53:55,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:55,140 INFO L93 Difference]: Finished difference Result 152 states and 152 transitions. [2021-01-06 16:53:55,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-01-06 16:53:55,140 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 144 [2021-01-06 16:53:55,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:55,141 INFO L225 Difference]: With dead ends: 152 [2021-01-06 16:53:55,141 INFO L226 Difference]: Without dead ends: 148 [2021-01-06 16:53:55,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2638, Invalid=3062, Unknown=0, NotChecked=0, Total=5700 [2021-01-06 16:53:55,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-01-06 16:53:55,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2021-01-06 16:53:55,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2021-01-06 16:53:55,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2021-01-06 16:53:55,145 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 144 [2021-01-06 16:53:55,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:55,145 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2021-01-06 16:53:55,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2021-01-06 16:53:55,145 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2021-01-06 16:53:55,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-01-06 16:53:55,146 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:55,146 INFO L422 BasicCegarLoop]: trace histogram [70, 70, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:55,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:55,360 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:55,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:55,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1307930898, now seen corresponding path program 70 times [2021-01-06 16:53:55,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:55,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833043911] [2021-01-06 16:53:55,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:55,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:58,717 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 16:53:58,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833043911] [2021-01-06 16:53:58,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884757101] [2021-01-06 16:53:58,717 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 16:53:58,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:53:58,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:58,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 807 conjuncts, 74 conjunts are in the unsatisfiable core [2021-01-06 16:53:58,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:59,142 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 16:53:59,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:59,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 76 [2021-01-06 16:53:59,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627274588] [2021-01-06 16:53:59,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2021-01-06 16:53:59,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:59,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-01-06 16:53:59,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2706, Invalid=2994, Unknown=0, NotChecked=0, Total=5700 [2021-01-06 16:53:59,144 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 76 states. [2021-01-06 16:53:59,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:59,361 INFO L93 Difference]: Finished difference Result 154 states and 154 transitions. [2021-01-06 16:53:59,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-01-06 16:53:59,362 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 146 [2021-01-06 16:53:59,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:59,362 INFO L225 Difference]: With dead ends: 154 [2021-01-06 16:53:59,362 INFO L226 Difference]: Without dead ends: 150 [2021-01-06 16:53:59,363 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2711, Invalid=3141, Unknown=0, NotChecked=0, Total=5852 [2021-01-06 16:53:59,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-01-06 16:53:59,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2021-01-06 16:53:59,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2021-01-06 16:53:59,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2021-01-06 16:53:59,366 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 146 [2021-01-06 16:53:59,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:59,366 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2021-01-06 16:53:59,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2021-01-06 16:53:59,366 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2021-01-06 16:53:59,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-01-06 16:53:59,367 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:59,367 INFO L422 BasicCegarLoop]: trace histogram [71, 71, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:59,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-01-06 16:53:59,581 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:59,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:59,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1556967827, now seen corresponding path program 71 times [2021-01-06 16:53:59,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:59,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231990329] [2021-01-06 16:53:59,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:59,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:54:03,039 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 16:54:03,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231990329] [2021-01-06 16:54:03,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955132223] [2021-01-06 16:54:03,040 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 16:54:03,270 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2021-01-06 16:54:03,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:54:03,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 818 conjuncts, 75 conjunts are in the unsatisfiable core [2021-01-06 16:54:03,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:54:03,554 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 16:54:03,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:54:03,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 77 [2021-01-06 16:54:03,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710162441] [2021-01-06 16:54:03,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 77 states [2021-01-06 16:54:03,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:54:03,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-01-06 16:54:03,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2780, Invalid=3072, Unknown=0, NotChecked=0, Total=5852 [2021-01-06 16:54:03,556 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 77 states. [2021-01-06 16:54:03,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:54:03,865 INFO L93 Difference]: Finished difference Result 156 states and 156 transitions. [2021-01-06 16:54:03,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-01-06 16:54:03,865 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 148 [2021-01-06 16:54:03,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:54:03,866 INFO L225 Difference]: With dead ends: 156 [2021-01-06 16:54:03,869 INFO L226 Difference]: Without dead ends: 152 [2021-01-06 16:54:03,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2785, Invalid=3221, Unknown=0, NotChecked=0, Total=6006 [2021-01-06 16:54:03,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-01-06 16:54:03,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2021-01-06 16:54:03,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2021-01-06 16:54:03,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2021-01-06 16:54:03,874 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 148 [2021-01-06 16:54:03,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:54:03,874 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2021-01-06 16:54:03,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2021-01-06 16:54:03,874 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2021-01-06 16:54:03,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-01-06 16:54:03,875 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:54:03,875 INFO L422 BasicCegarLoop]: trace histogram [72, 72, 1, 1, 1, 1, 1, 1] [2021-01-06 16:54:04,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:54:04,089 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:54:04,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:54:04,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1650605816, now seen corresponding path program 72 times [2021-01-06 16:54:04,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:54:04,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988994172] [2021-01-06 16:54:04,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:54:04,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:54:07,632 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 16:54:07,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988994172] [2021-01-06 16:54:07,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536531361] [2021-01-06 16:54:07,633 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 16:54:07,891 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2021-01-06 16:54:07,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:54:07,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 81 conjunts are in the unsatisfiable core [2021-01-06 16:54:07,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:54:08,137 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 16:54:08,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:54:08,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 78 [2021-01-06 16:54:08,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518849948] [2021-01-06 16:54:08,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-01-06 16:54:08,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:54:08,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-01-06 16:54:08,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2855, Invalid=3151, Unknown=0, NotChecked=0, Total=6006 [2021-01-06 16:54:08,139 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 78 states. [2021-01-06 16:54:08,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:54:08,398 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2021-01-06 16:54:08,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-01-06 16:54:08,399 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 150 [2021-01-06 16:54:08,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:54:08,400 INFO L225 Difference]: With dead ends: 158 [2021-01-06 16:54:08,400 INFO L226 Difference]: Without dead ends: 154 [2021-01-06 16:54:08,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2860, Invalid=3302, Unknown=0, NotChecked=0, Total=6162 [2021-01-06 16:54:08,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-01-06 16:54:08,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2021-01-06 16:54:08,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2021-01-06 16:54:08,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2021-01-06 16:54:08,404 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 150 [2021-01-06 16:54:08,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:54:08,404 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2021-01-06 16:54:08,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2021-01-06 16:54:08,405 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2021-01-06 16:54:08,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-01-06 16:54:08,405 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:54:08,405 INFO L422 BasicCegarLoop]: trace histogram [73, 73, 1, 1, 1, 1, 1, 1] [2021-01-06 16:54:08,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:54:08,616 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:54:08,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:54:08,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1442400029, now seen corresponding path program 73 times [2021-01-06 16:54:08,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:54:08,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865969425] [2021-01-06 16:54:08,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:54:08,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:54:12,299 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 16:54:12,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865969425] [2021-01-06 16:54:12,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549870207] [2021-01-06 16:54:12,299 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 16:54:12,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:54:12,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 77 conjunts are in the unsatisfiable core [2021-01-06 16:54:12,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:54:12,714 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 16:54:12,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:54:12,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 79 [2021-01-06 16:54:12,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638667092] [2021-01-06 16:54:12,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 79 states [2021-01-06 16:54:12,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:54:12,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-01-06 16:54:12,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2931, Invalid=3231, Unknown=0, NotChecked=0, Total=6162 [2021-01-06 16:54:12,716 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 79 states. [2021-01-06 16:54:12,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:54:12,923 INFO L93 Difference]: Finished difference Result 160 states and 160 transitions. [2021-01-06 16:54:12,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-01-06 16:54:12,923 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 152 [2021-01-06 16:54:12,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:54:12,924 INFO L225 Difference]: With dead ends: 160 [2021-01-06 16:54:12,925 INFO L226 Difference]: Without dead ends: 156 [2021-01-06 16:54:12,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2936, Invalid=3384, Unknown=0, NotChecked=0, Total=6320 [2021-01-06 16:54:12,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-01-06 16:54:12,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2021-01-06 16:54:12,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2021-01-06 16:54:12,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2021-01-06 16:54:12,930 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 152 [2021-01-06 16:54:12,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:54:12,930 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2021-01-06 16:54:12,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 79 states. [2021-01-06 16:54:12,930 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2021-01-06 16:54:12,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-01-06 16:54:12,931 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:54:12,931 INFO L422 BasicCegarLoop]: trace histogram [74, 74, 1, 1, 1, 1, 1, 1] [2021-01-06 16:54:13,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:54:13,145 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:54:13,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:54:13,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1074865662, now seen corresponding path program 74 times [2021-01-06 16:54:13,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:54:13,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399614499] [2021-01-06 16:54:13,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:54:13,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:54:16,922 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 16:54:16,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399614499] [2021-01-06 16:54:16,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241559426] [2021-01-06 16:54:16,923 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 16:54:17,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:54:17,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:54:17,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 83 conjunts are in the unsatisfiable core [2021-01-06 16:54:17,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:54:17,358 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 16:54:17,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:54:17,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 80 [2021-01-06 16:54:17,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242570202] [2021-01-06 16:54:17,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2021-01-06 16:54:17,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:54:17,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-01-06 16:54:17,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3008, Invalid=3312, Unknown=0, NotChecked=0, Total=6320 [2021-01-06 16:54:17,360 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 80 states. [2021-01-06 16:54:17,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:54:17,587 INFO L93 Difference]: Finished difference Result 162 states and 162 transitions. [2021-01-06 16:54:17,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-01-06 16:54:17,587 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 154 [2021-01-06 16:54:17,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:54:17,589 INFO L225 Difference]: With dead ends: 162 [2021-01-06 16:54:17,589 INFO L226 Difference]: Without dead ends: 158 [2021-01-06 16:54:17,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3013, Invalid=3467, Unknown=0, NotChecked=0, Total=6480 [2021-01-06 16:54:17,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-01-06 16:54:17,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2021-01-06 16:54:17,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2021-01-06 16:54:17,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2021-01-06 16:54:17,592 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 154 [2021-01-06 16:54:17,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:54:17,593 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2021-01-06 16:54:17,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2021-01-06 16:54:17,593 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2021-01-06 16:54:17,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-01-06 16:54:17,593 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:54:17,593 INFO L422 BasicCegarLoop]: trace histogram [75, 75, 1, 1, 1, 1, 1, 1] [2021-01-06 16:54:17,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-01-06 16:54:17,794 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:54:17,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:54:17,795 INFO L82 PathProgramCache]: Analyzing trace with hash -2100607065, now seen corresponding path program 75 times [2021-01-06 16:54:17,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:54:17,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859422730] [2021-01-06 16:54:17,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:54:17,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:54:21,705 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 16:54:21,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859422730] [2021-01-06 16:54:21,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649007807] [2021-01-06 16:54:21,706 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 16:54:21,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2021-01-06 16:54:21,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:54:21,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 862 conjuncts, 84 conjunts are in the unsatisfiable core [2021-01-06 16:54:21,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:54:22,252 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 16:54:22,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:54:22,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 81 [2021-01-06 16:54:22,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737862361] [2021-01-06 16:54:22,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 81 states [2021-01-06 16:54:22,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:54:22,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-01-06 16:54:22,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3086, Invalid=3394, Unknown=0, NotChecked=0, Total=6480 [2021-01-06 16:54:22,255 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 81 states. [2021-01-06 16:54:22,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:54:22,540 INFO L93 Difference]: Finished difference Result 164 states and 164 transitions. [2021-01-06 16:54:22,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-01-06 16:54:22,540 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 156 [2021-01-06 16:54:22,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:54:22,541 INFO L225 Difference]: With dead ends: 164 [2021-01-06 16:54:22,541 INFO L226 Difference]: Without dead ends: 160 [2021-01-06 16:54:22,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3091, Invalid=3551, Unknown=0, NotChecked=0, Total=6642 [2021-01-06 16:54:22,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-01-06 16:54:22,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 159. [2021-01-06 16:54:22,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2021-01-06 16:54:22,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2021-01-06 16:54:22,547 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 156 [2021-01-06 16:54:22,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:54:22,547 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2021-01-06 16:54:22,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2021-01-06 16:54:22,547 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2021-01-06 16:54:22,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-01-06 16:54:22,548 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:54:22,548 INFO L422 BasicCegarLoop]: trace histogram [76, 76, 1, 1, 1, 1, 1, 1] [2021-01-06 16:54:22,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:54:22,758 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:54:22,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:54:22,758 INFO L82 PathProgramCache]: Analyzing trace with hash 4382732, now seen corresponding path program 76 times [2021-01-06 16:54:22,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:54:22,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403481628] [2021-01-06 16:54:22,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:54:22,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:54:26,774 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 16:54:26,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403481628] [2021-01-06 16:54:26,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873350595] [2021-01-06 16:54:26,774 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 16:54:26,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:54:26,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:54:26,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 873 conjuncts, 80 conjunts are in the unsatisfiable core [2021-01-06 16:54:26,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:54:27,243 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 16:54:27,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:54:27,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 82 [2021-01-06 16:54:27,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759782764] [2021-01-06 16:54:27,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-01-06 16:54:27,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:54:27,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-01-06 16:54:27,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3165, Invalid=3477, Unknown=0, NotChecked=0, Total=6642 [2021-01-06 16:54:27,245 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 82 states. [2021-01-06 16:54:27,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:54:27,536 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2021-01-06 16:54:27,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-01-06 16:54:27,537 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 158 [2021-01-06 16:54:27,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:54:27,538 INFO L225 Difference]: With dead ends: 166 [2021-01-06 16:54:27,538 INFO L226 Difference]: Without dead ends: 162 [2021-01-06 16:54:27,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3170, Invalid=3636, Unknown=0, NotChecked=0, Total=6806 [2021-01-06 16:54:27,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-01-06 16:54:27,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2021-01-06 16:54:27,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2021-01-06 16:54:27,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2021-01-06 16:54:27,543 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 158 [2021-01-06 16:54:27,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:54:27,543 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2021-01-06 16:54:27,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2021-01-06 16:54:27,543 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2021-01-06 16:54:27,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-01-06 16:54:27,544 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:54:27,544 INFO L422 BasicCegarLoop]: trace histogram [77, 77, 1, 1, 1, 1, 1, 1] [2021-01-06 16:54:27,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:54:27,760 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:54:27,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:54:27,760 INFO L82 PathProgramCache]: Analyzing trace with hash -30018767, now seen corresponding path program 77 times [2021-01-06 16:54:27,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:54:27,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564173901] [2021-01-06 16:54:27,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:54:27,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:54:31,954 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 16:54:31,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564173901] [2021-01-06 16:54:31,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7235314] [2021-01-06 16:54:31,954 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 16:54:32,209 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2021-01-06 16:54:32,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:54:32,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 884 conjuncts, 81 conjunts are in the unsatisfiable core [2021-01-06 16:54:32,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:54:32,464 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 16:54:32,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:54:32,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 83 [2021-01-06 16:54:32,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393159998] [2021-01-06 16:54:32,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 83 states [2021-01-06 16:54:32,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:54:32,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-01-06 16:54:32,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3245, Invalid=3561, Unknown=0, NotChecked=0, Total=6806 [2021-01-06 16:54:32,465 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 83 states. [2021-01-06 16:54:32,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:54:32,702 INFO L93 Difference]: Finished difference Result 168 states and 168 transitions. [2021-01-06 16:54:32,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-01-06 16:54:32,703 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 160 [2021-01-06 16:54:32,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:54:32,704 INFO L225 Difference]: With dead ends: 168 [2021-01-06 16:54:32,704 INFO L226 Difference]: Without dead ends: 164 [2021-01-06 16:54:32,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3250, Invalid=3722, Unknown=0, NotChecked=0, Total=6972 [2021-01-06 16:54:32,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-01-06 16:54:32,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 163. [2021-01-06 16:54:32,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2021-01-06 16:54:32,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2021-01-06 16:54:32,710 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 160 [2021-01-06 16:54:32,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:54:32,710 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2021-01-06 16:54:32,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 83 states. [2021-01-06 16:54:32,710 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2021-01-06 16:54:32,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-01-06 16:54:32,711 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:54:32,711 INFO L422 BasicCegarLoop]: trace histogram [78, 78, 1, 1, 1, 1, 1, 1] [2021-01-06 16:54:32,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-01-06 16:54:32,926 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:54:32,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:54:32,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1269879062, now seen corresponding path program 78 times [2021-01-06 16:54:32,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:54:32,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812279558] [2021-01-06 16:54:32,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:54:32,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:54:37,175 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 16:54:37,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812279558] [2021-01-06 16:54:37,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714506587] [2021-01-06 16:54:37,176 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 16:54:37,469 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2021-01-06 16:54:37,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:54:37,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 895 conjuncts, 87 conjunts are in the unsatisfiable core [2021-01-06 16:54:37,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:54:37,738 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 16:54:37,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:54:37,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 84 [2021-01-06 16:54:37,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735336973] [2021-01-06 16:54:37,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 84 states [2021-01-06 16:54:37,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:54:37,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-01-06 16:54:37,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3326, Invalid=3646, Unknown=0, NotChecked=0, Total=6972 [2021-01-06 16:54:37,741 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 84 states. [2021-01-06 16:54:37,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:54:37,971 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2021-01-06 16:54:37,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-01-06 16:54:37,972 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 162 [2021-01-06 16:54:37,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:54:37,973 INFO L225 Difference]: With dead ends: 170 [2021-01-06 16:54:37,973 INFO L226 Difference]: Without dead ends: 166 [2021-01-06 16:54:37,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3331, Invalid=3809, Unknown=0, NotChecked=0, Total=7140 [2021-01-06 16:54:37,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-01-06 16:54:37,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 165. [2021-01-06 16:54:37,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2021-01-06 16:54:37,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2021-01-06 16:54:37,978 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 162 [2021-01-06 16:54:37,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:54:37,978 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2021-01-06 16:54:37,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2021-01-06 16:54:37,978 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2021-01-06 16:54:37,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-01-06 16:54:37,978 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:54:37,979 INFO L422 BasicCegarLoop]: trace histogram [79, 79, 1, 1, 1, 1, 1, 1] [2021-01-06 16:54:38,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-01-06 16:54:38,179 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:54:38,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:54:38,180 INFO L82 PathProgramCache]: Analyzing trace with hash 636209595, now seen corresponding path program 79 times [2021-01-06 16:54:38,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:54:38,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334399080] [2021-01-06 16:54:38,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:54:38,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:54:42,566 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 16:54:42,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334399080] [2021-01-06 16:54:42,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247761000] [2021-01-06 16:54:42,567 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 16:54:42,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:54:42,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 83 conjunts are in the unsatisfiable core [2021-01-06 16:54:42,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:54:43,040 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 16:54:43,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:54:43,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 85 [2021-01-06 16:54:43,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414440085] [2021-01-06 16:54:43,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 85 states [2021-01-06 16:54:43,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:54:43,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-01-06 16:54:43,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3408, Invalid=3732, Unknown=0, NotChecked=0, Total=7140 [2021-01-06 16:54:43,042 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand 85 states. [2021-01-06 16:54:43,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:54:43,363 INFO L93 Difference]: Finished difference Result 172 states and 172 transitions. [2021-01-06 16:54:43,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-01-06 16:54:43,364 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 164 [2021-01-06 16:54:43,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:54:43,365 INFO L225 Difference]: With dead ends: 172 [2021-01-06 16:54:43,365 INFO L226 Difference]: Without dead ends: 168 [2021-01-06 16:54:43,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=3413, Invalid=3897, Unknown=0, NotChecked=0, Total=7310 [2021-01-06 16:54:43,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-01-06 16:54:43,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 167. [2021-01-06 16:54:43,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2021-01-06 16:54:43,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2021-01-06 16:54:43,368 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 164 [2021-01-06 16:54:43,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:54:43,368 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2021-01-06 16:54:43,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 85 states. [2021-01-06 16:54:43,368 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2021-01-06 16:54:43,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-01-06 16:54:43,369 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:54:43,369 INFO L422 BasicCegarLoop]: trace histogram [80, 80, 1, 1, 1, 1, 1, 1] [2021-01-06 16:54:43,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:54:43,570 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:54:43,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:54:43,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1565207840, now seen corresponding path program 80 times [2021-01-06 16:54:43,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:54:43,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609644938] [2021-01-06 16:54:43,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:54:43,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:54:48,071 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 16:54:48,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609644938] [2021-01-06 16:54:48,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551656216] [2021-01-06 16:54:48,072 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 16:54:48,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:54:48,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:54:48,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 917 conjuncts, 89 conjunts are in the unsatisfiable core [2021-01-06 16:54:48,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:54:48,520 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 16:54:48,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:54:48,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 86 [2021-01-06 16:54:48,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747532878] [2021-01-06 16:54:48,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 86 states [2021-01-06 16:54:48,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:54:48,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-01-06 16:54:48,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3491, Invalid=3819, Unknown=0, NotChecked=0, Total=7310 [2021-01-06 16:54:48,522 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 86 states. [2021-01-06 16:54:48,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:54:48,781 INFO L93 Difference]: Finished difference Result 174 states and 174 transitions. [2021-01-06 16:54:48,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-01-06 16:54:48,782 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 166 [2021-01-06 16:54:48,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:54:48,783 INFO L225 Difference]: With dead ends: 174 [2021-01-06 16:54:48,783 INFO L226 Difference]: Without dead ends: 170 [2021-01-06 16:54:48,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=3496, Invalid=3986, Unknown=0, NotChecked=0, Total=7482 [2021-01-06 16:54:48,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-01-06 16:54:48,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2021-01-06 16:54:48,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2021-01-06 16:54:48,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2021-01-06 16:54:48,789 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 166 [2021-01-06 16:54:48,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:54:48,789 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2021-01-06 16:54:48,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 86 states. [2021-01-06 16:54:48,789 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2021-01-06 16:54:48,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-01-06 16:54:48,790 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:54:48,790 INFO L422 BasicCegarLoop]: trace histogram [81, 81, 1, 1, 1, 1, 1, 1] [2021-01-06 16:54:48,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:54:48,991 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:54:48,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:54:48,992 INFO L82 PathProgramCache]: Analyzing trace with hash 979323717, now seen corresponding path program 81 times [2021-01-06 16:54:48,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:54:48,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169004190] [2021-01-06 16:54:48,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:54:49,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:54:53,675 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 16:54:53,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169004190] [2021-01-06 16:54:53,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262064600] [2021-01-06 16:54:53,675 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 16:54:53,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2021-01-06 16:54:53,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:54:53,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 928 conjuncts, 90 conjunts are in the unsatisfiable core [2021-01-06 16:54:53,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:54:54,262 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 16:54:54,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:54:54,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 87 [2021-01-06 16:54:54,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383515835] [2021-01-06 16:54:54,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 87 states [2021-01-06 16:54:54,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:54:54,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-01-06 16:54:54,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3575, Invalid=3907, Unknown=0, NotChecked=0, Total=7482 [2021-01-06 16:54:54,264 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand 87 states. [2021-01-06 16:54:54,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:54:54,579 INFO L93 Difference]: Finished difference Result 176 states and 176 transitions. [2021-01-06 16:54:54,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-01-06 16:54:54,580 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 168 [2021-01-06 16:54:54,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:54:54,581 INFO L225 Difference]: With dead ends: 176 [2021-01-06 16:54:54,581 INFO L226 Difference]: Without dead ends: 172 [2021-01-06 16:54:54,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3580, Invalid=4076, Unknown=0, NotChecked=0, Total=7656 [2021-01-06 16:54:54,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-01-06 16:54:54,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 171. [2021-01-06 16:54:54,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2021-01-06 16:54:54,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2021-01-06 16:54:54,587 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 168 [2021-01-06 16:54:54,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:54:54,587 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2021-01-06 16:54:54,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 87 states. [2021-01-06 16:54:54,588 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2021-01-06 16:54:54,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-01-06 16:54:54,589 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:54:54,589 INFO L422 BasicCegarLoop]: trace histogram [82, 82, 1, 1, 1, 1, 1, 1] [2021-01-06 16:54:54,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:54:54,804 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:54:54,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:54:54,805 INFO L82 PathProgramCache]: Analyzing trace with hash 585397290, now seen corresponding path program 82 times [2021-01-06 16:54:54,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:54:54,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060246719] [2021-01-06 16:54:54,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:54:54,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:54:59,563 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 16:54:59,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060246719] [2021-01-06 16:54:59,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299005078] [2021-01-06 16:54:59,563 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 16:54:59,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:54:59,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:54:59,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 939 conjuncts, 86 conjunts are in the unsatisfiable core [2021-01-06 16:54:59,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:00,052 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 16:55:00,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:00,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 88 [2021-01-06 16:55:00,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122799768] [2021-01-06 16:55:00,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 88 states [2021-01-06 16:55:00,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:00,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-01-06 16:55:00,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3660, Invalid=3996, Unknown=0, NotChecked=0, Total=7656 [2021-01-06 16:55:00,054 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 88 states. [2021-01-06 16:55:00,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:00,304 INFO L93 Difference]: Finished difference Result 178 states and 178 transitions. [2021-01-06 16:55:00,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-01-06 16:55:00,305 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 170 [2021-01-06 16:55:00,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:00,306 INFO L225 Difference]: With dead ends: 178 [2021-01-06 16:55:00,307 INFO L226 Difference]: Without dead ends: 174 [2021-01-06 16:55:00,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=3665, Invalid=4167, Unknown=0, NotChecked=0, Total=7832 [2021-01-06 16:55:00,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-01-06 16:55:00,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 173. [2021-01-06 16:55:00,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2021-01-06 16:55:00,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2021-01-06 16:55:00,312 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 170 [2021-01-06 16:55:00,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:00,312 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2021-01-06 16:55:00,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 88 states. [2021-01-06 16:55:00,313 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2021-01-06 16:55:00,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-01-06 16:55:00,313 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:00,314 INFO L422 BasicCegarLoop]: trace histogram [83, 83, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:00,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:00,529 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:00,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:00,529 INFO L82 PathProgramCache]: Analyzing trace with hash -20777009, now seen corresponding path program 83 times [2021-01-06 16:55:00,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:00,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821390092] [2021-01-06 16:55:00,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:00,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:05,554 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 16:55:05,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821390092] [2021-01-06 16:55:05,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731924107] [2021-01-06 16:55:05,555 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 16:55:05,836 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2021-01-06 16:55:05,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:05,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 950 conjuncts, 87 conjunts are in the unsatisfiable core [2021-01-06 16:55:05,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:06,142 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 16:55:06,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:06,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 89 [2021-01-06 16:55:06,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955020559] [2021-01-06 16:55:06,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 89 states [2021-01-06 16:55:06,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:06,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-01-06 16:55:06,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3746, Invalid=4086, Unknown=0, NotChecked=0, Total=7832 [2021-01-06 16:55:06,144 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 89 states. [2021-01-06 16:55:06,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:06,491 INFO L93 Difference]: Finished difference Result 180 states and 180 transitions. [2021-01-06 16:55:06,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-01-06 16:55:06,492 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 172 [2021-01-06 16:55:06,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:06,493 INFO L225 Difference]: With dead ends: 180 [2021-01-06 16:55:06,493 INFO L226 Difference]: Without dead ends: 176 [2021-01-06 16:55:06,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=3751, Invalid=4259, Unknown=0, NotChecked=0, Total=8010 [2021-01-06 16:55:06,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-01-06 16:55:06,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2021-01-06 16:55:06,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2021-01-06 16:55:06,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2021-01-06 16:55:06,498 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 172 [2021-01-06 16:55:06,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:06,498 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2021-01-06 16:55:06,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 89 states. [2021-01-06 16:55:06,498 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2021-01-06 16:55:06,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-01-06 16:55:06,499 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:06,499 INFO L422 BasicCegarLoop]: trace histogram [84, 84, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:06,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:06,714 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:06,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:06,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1561273908, now seen corresponding path program 84 times [2021-01-06 16:55:06,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:06,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549809386] [2021-01-06 16:55:06,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:06,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:11,796 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 16:55:11,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549809386] [2021-01-06 16:55:11,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002192789] [2021-01-06 16:55:11,796 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 16:55:12,126 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2021-01-06 16:55:12,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:12,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 961 conjuncts, 93 conjunts are in the unsatisfiable core [2021-01-06 16:55:12,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:12,436 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 16:55:12,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:12,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 90 [2021-01-06 16:55:12,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879184962] [2021-01-06 16:55:12,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 90 states [2021-01-06 16:55:12,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:12,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-01-06 16:55:12,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3833, Invalid=4177, Unknown=0, NotChecked=0, Total=8010 [2021-01-06 16:55:12,439 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 90 states. [2021-01-06 16:55:12,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:12,822 INFO L93 Difference]: Finished difference Result 182 states and 182 transitions. [2021-01-06 16:55:12,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-01-06 16:55:12,822 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 174 [2021-01-06 16:55:12,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:12,824 INFO L225 Difference]: With dead ends: 182 [2021-01-06 16:55:12,824 INFO L226 Difference]: Without dead ends: 178 [2021-01-06 16:55:12,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=3838, Invalid=4352, Unknown=0, NotChecked=0, Total=8190 [2021-01-06 16:55:12,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-01-06 16:55:12,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2021-01-06 16:55:12,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2021-01-06 16:55:12,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2021-01-06 16:55:12,830 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 174 [2021-01-06 16:55:12,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:12,830 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2021-01-06 16:55:12,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 90 states. [2021-01-06 16:55:12,830 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2021-01-06 16:55:12,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-01-06 16:55:12,831 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:12,831 INFO L422 BasicCegarLoop]: trace histogram [85, 85, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:13,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-01-06 16:55:13,037 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:13,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:13,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1493782361, now seen corresponding path program 85 times [2021-01-06 16:55:13,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:13,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79848647] [2021-01-06 16:55:13,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:13,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:18,228 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 16:55:18,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79848647] [2021-01-06 16:55:18,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724576471] [2021-01-06 16:55:18,229 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 16:55:18,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:18,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 972 conjuncts, 89 conjunts are in the unsatisfiable core [2021-01-06 16:55:18,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:18,741 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 16:55:18,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:18,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 91 [2021-01-06 16:55:18,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243164162] [2021-01-06 16:55:18,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 91 states [2021-01-06 16:55:18,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:18,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-01-06 16:55:18,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3921, Invalid=4269, Unknown=0, NotChecked=0, Total=8190 [2021-01-06 16:55:18,744 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand 91 states. [2021-01-06 16:55:19,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:19,131 INFO L93 Difference]: Finished difference Result 184 states and 184 transitions. [2021-01-06 16:55:19,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-01-06 16:55:19,131 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 176 [2021-01-06 16:55:19,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:19,133 INFO L225 Difference]: With dead ends: 184 [2021-01-06 16:55:19,133 INFO L226 Difference]: Without dead ends: 180 [2021-01-06 16:55:19,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=3926, Invalid=4446, Unknown=0, NotChecked=0, Total=8372 [2021-01-06 16:55:19,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-01-06 16:55:19,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 179. [2021-01-06 16:55:19,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2021-01-06 16:55:19,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2021-01-06 16:55:19,138 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 176 [2021-01-06 16:55:19,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:19,139 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2021-01-06 16:55:19,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 91 states. [2021-01-06 16:55:19,139 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2021-01-06 16:55:19,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-01-06 16:55:19,140 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:19,140 INFO L422 BasicCegarLoop]: trace histogram [86, 86, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:19,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:19,348 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:19,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:19,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1058915134, now seen corresponding path program 86 times [2021-01-06 16:55:19,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:19,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223066108] [2021-01-06 16:55:19,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:19,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:24,786 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 16:55:24,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223066108] [2021-01-06 16:55:24,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333470889] [2021-01-06 16:55:24,786 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 16:55:24,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:55:24,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:24,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 983 conjuncts, 95 conjunts are in the unsatisfiable core [2021-01-06 16:55:24,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:25,344 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 16:55:25,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:25,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 92 [2021-01-06 16:55:25,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830009040] [2021-01-06 16:55:25,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 92 states [2021-01-06 16:55:25,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:25,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-01-06 16:55:25,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4010, Invalid=4362, Unknown=0, NotChecked=0, Total=8372 [2021-01-06 16:55:25,347 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 92 states. [2021-01-06 16:55:25,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:25,749 INFO L93 Difference]: Finished difference Result 186 states and 186 transitions. [2021-01-06 16:55:25,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-01-06 16:55:25,749 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 178 [2021-01-06 16:55:25,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:25,751 INFO L225 Difference]: With dead ends: 186 [2021-01-06 16:55:25,751 INFO L226 Difference]: Without dead ends: 182 [2021-01-06 16:55:25,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=4015, Invalid=4541, Unknown=0, NotChecked=0, Total=8556 [2021-01-06 16:55:25,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-01-06 16:55:25,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2021-01-06 16:55:25,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2021-01-06 16:55:25,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2021-01-06 16:55:25,756 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 178 [2021-01-06 16:55:25,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:25,757 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2021-01-06 16:55:25,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 92 states. [2021-01-06 16:55:25,757 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2021-01-06 16:55:25,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-01-06 16:55:25,758 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:25,758 INFO L422 BasicCegarLoop]: trace histogram [87, 87, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:25,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-01-06 16:55:25,972 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:25,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:25,972 INFO L82 PathProgramCache]: Analyzing trace with hash -236662301, now seen corresponding path program 87 times [2021-01-06 16:55:25,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:25,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249716715] [2021-01-06 16:55:25,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:26,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:31,472 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 16:55:31,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249716715] [2021-01-06 16:55:31,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521638731] [2021-01-06 16:55:31,473 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 16:55:31,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2021-01-06 16:55:31,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:31,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 994 conjuncts, 96 conjunts are in the unsatisfiable core [2021-01-06 16:55:31,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:32,142 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 16:55:32,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:32,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 93 [2021-01-06 16:55:32,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135753014] [2021-01-06 16:55:32,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 93 states [2021-01-06 16:55:32,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:32,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-01-06 16:55:32,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4100, Invalid=4456, Unknown=0, NotChecked=0, Total=8556 [2021-01-06 16:55:32,144 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand 93 states. [2021-01-06 16:55:32,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:32,547 INFO L93 Difference]: Finished difference Result 188 states and 188 transitions. [2021-01-06 16:55:32,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-01-06 16:55:32,547 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 180 [2021-01-06 16:55:32,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:32,548 INFO L225 Difference]: With dead ends: 188 [2021-01-06 16:55:32,548 INFO L226 Difference]: Without dead ends: 184 [2021-01-06 16:55:32,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=4105, Invalid=4637, Unknown=0, NotChecked=0, Total=8742 [2021-01-06 16:55:32,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-01-06 16:55:32,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 183. [2021-01-06 16:55:32,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2021-01-06 16:55:32,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2021-01-06 16:55:32,553 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 180 [2021-01-06 16:55:32,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:32,553 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2021-01-06 16:55:32,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 93 states. [2021-01-06 16:55:32,554 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2021-01-06 16:55:32,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-01-06 16:55:32,557 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:32,557 INFO L422 BasicCegarLoop]: trace histogram [88, 88, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:32,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-01-06 16:55:32,771 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:32,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:32,771 INFO L82 PathProgramCache]: Analyzing trace with hash 253938504, now seen corresponding path program 88 times [2021-01-06 16:55:32,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:32,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063867256] [2021-01-06 16:55:32,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:32,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:38,536 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 16:55:38,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063867256] [2021-01-06 16:55:38,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773200450] [2021-01-06 16:55:38,537 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 16:55:38,746 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:55:38,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:38,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 1005 conjuncts, 92 conjunts are in the unsatisfiable core [2021-01-06 16:55:38,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:39,067 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 16:55:39,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:39,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 94 [2021-01-06 16:55:39,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804808027] [2021-01-06 16:55:39,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 94 states [2021-01-06 16:55:39,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:39,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-01-06 16:55:39,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4191, Invalid=4551, Unknown=0, NotChecked=0, Total=8742 [2021-01-06 16:55:39,069 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 94 states. [2021-01-06 16:55:39,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:39,392 INFO L93 Difference]: Finished difference Result 190 states and 190 transitions. [2021-01-06 16:55:39,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-01-06 16:55:39,393 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 182 [2021-01-06 16:55:39,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:39,394 INFO L225 Difference]: With dead ends: 190 [2021-01-06 16:55:39,395 INFO L226 Difference]: Without dead ends: 186 [2021-01-06 16:55:39,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=4196, Invalid=4734, Unknown=0, NotChecked=0, Total=8930 [2021-01-06 16:55:39,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-01-06 16:55:39,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2021-01-06 16:55:39,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2021-01-06 16:55:39,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2021-01-06 16:55:39,399 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 182 [2021-01-06 16:55:39,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:39,400 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2021-01-06 16:55:39,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 94 states. [2021-01-06 16:55:39,400 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2021-01-06 16:55:39,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-01-06 16:55:39,401 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:39,401 INFO L422 BasicCegarLoop]: trace histogram [89, 89, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:39,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:39,615 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:39,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:39,615 INFO L82 PathProgramCache]: Analyzing trace with hash -725090451, now seen corresponding path program 89 times [2021-01-06 16:55:39,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:39,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342325653] [2021-01-06 16:55:39,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:39,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:45,579 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 16:55:45,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342325653] [2021-01-06 16:55:45,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504011012] [2021-01-06 16:55:45,580 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 16:55:45,892 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2021-01-06 16:55:45,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:45,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 1016 conjuncts, 93 conjunts are in the unsatisfiable core [2021-01-06 16:55:45,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:46,221 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 16:55:46,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:46,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 95 [2021-01-06 16:55:46,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212379298] [2021-01-06 16:55:46,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 95 states [2021-01-06 16:55:46,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:46,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-01-06 16:55:46,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4283, Invalid=4647, Unknown=0, NotChecked=0, Total=8930 [2021-01-06 16:55:46,223 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand 95 states. [2021-01-06 16:55:46,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:46,527 INFO L93 Difference]: Finished difference Result 192 states and 192 transitions. [2021-01-06 16:55:46,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-01-06 16:55:46,528 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 184 [2021-01-06 16:55:46,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:46,529 INFO L225 Difference]: With dead ends: 192 [2021-01-06 16:55:46,529 INFO L226 Difference]: Without dead ends: 188 [2021-01-06 16:55:46,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=4288, Invalid=4832, Unknown=0, NotChecked=0, Total=9120 [2021-01-06 16:55:46,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-01-06 16:55:46,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 187. [2021-01-06 16:55:46,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2021-01-06 16:55:46,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2021-01-06 16:55:46,534 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 184 [2021-01-06 16:55:46,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:46,535 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2021-01-06 16:55:46,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 95 states. [2021-01-06 16:55:46,535 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2021-01-06 16:55:46,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-01-06 16:55:46,536 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:46,536 INFO L422 BasicCegarLoop]: trace histogram [90, 90, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:46,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:46,750 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:46,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:46,750 INFO L82 PathProgramCache]: Analyzing trace with hash -974078382, now seen corresponding path program 90 times [2021-01-06 16:55:46,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:46,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101429206] [2021-01-06 16:55:46,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:46,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat