/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/loops-crafted-1/Mono4_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:55:09,093 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:55:09,100 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:55:09,180 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:55:09,181 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:55:09,187 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:55:09,193 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:55:09,201 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:55:09,206 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:55:09,214 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:55:09,219 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:55:09,222 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:55:09,222 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:55:09,227 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:55:09,231 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:55:09,233 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:55:09,235 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:55:09,242 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:55:09,253 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:55:09,263 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:55:09,266 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:55:09,270 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:55:09,272 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:55:09,273 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:55:09,310 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 16:55:09,321 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 16:55:09,322 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 16:55:09,335 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 16:55:09,337 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 16:55:09,338 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 16:55:09,339 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 16:55:09,340 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 16:55:09,349 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 16:55:09,349 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:55:09,351 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:55:09,353 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:55:09,356 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 16:55:09,419 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:55:09,420 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:55:09,426 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:55:09,427 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:55:09,427 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:55:09,428 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:55:09,428 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:55:09,428 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:55:09,428 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:55:09,429 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:55:09,430 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:55:09,432 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:55:09,432 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:55:09,432 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:55:09,433 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:55:09,433 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:55:09,433 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:55:09,433 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:55:09,434 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:55:09,434 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:55:09,434 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:55:09,434 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:55:09,435 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:55:09,435 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:55:09,435 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:55:09,435 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:55:09,956 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:55:10,001 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:55:10,006 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:55:10,008 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:55:10,009 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:55:10,011 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/Mono4_1.c [2021-01-06 16:55:10,134 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/dd15c17f7/cd5baa1ea1214ca3830d24b822c80e0a/FLAGe8f690e5d [2021-01-06 16:55:11,164 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:55:11,165 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/Mono4_1.c [2021-01-06 16:55:11,173 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/dd15c17f7/cd5baa1ea1214ca3830d24b822c80e0a/FLAGe8f690e5d [2021-01-06 16:55:11,449 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/dd15c17f7/cd5baa1ea1214ca3830d24b822c80e0a [2021-01-06 16:55:11,454 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:55:11,457 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:55:11,459 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:55:11,459 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:55:11,465 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:55:11,466 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:55:11" (1/1) ... [2021-01-06 16:55:11,468 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75dbcd67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:55:11, skipping insertion in model container [2021-01-06 16:55:11,468 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:55:11" (1/1) ... [2021-01-06 16:55:11,481 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:55:11,501 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 16:55:11,701 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/loops-crafted-1/Mono4_1.c[311,324] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] [2021-01-06 16:55:11,721 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:55:11,737 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 16:55:11,753 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/loops-crafted-1/Mono4_1.c[311,324] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] [2021-01-06 16:55:11,758 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:55:11,781 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:55:11,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:55:11 WrapperNode [2021-01-06 16:55:11,782 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:55:11,783 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:55:11,784 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:55:11,784 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:55:11,795 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:55:11" (1/1) ... [2021-01-06 16:55:11,805 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:55:11" (1/1) ... [2021-01-06 16:55:11,830 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:55:11,831 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:55:11,831 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:55:11,832 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:55:11,844 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:55:11" (1/1) ... [2021-01-06 16:55:11,845 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:55:11" (1/1) ... [2021-01-06 16:55:11,846 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:55:11" (1/1) ... [2021-01-06 16:55:11,847 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:55:11" (1/1) ... [2021-01-06 16:55:11,851 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:55:11" (1/1) ... [2021-01-06 16:55:11,856 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:55:11" (1/1) ... [2021-01-06 16:55:11,858 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:55:11" (1/1) ... [2021-01-06 16:55:11,861 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:55:11,863 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:55:11,863 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:55:11,863 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:55:11,865 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:55:11" (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 16:55:12,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:55:12,040 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:55:12,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:55:12,041 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:55:12,333 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:55:12,333 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-01-06 16:55:12,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:55:12 BoogieIcfgContainer [2021-01-06 16:55:12,336 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:55:12,339 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:55:12,340 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:55:12,345 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:55:12,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:55:11" (1/3) ... [2021-01-06 16:55:12,347 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56f23079 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:55:12, skipping insertion in model container [2021-01-06 16:55:12,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:55:11" (2/3) ... [2021-01-06 16:55:12,348 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56f23079 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:55:12, skipping insertion in model container [2021-01-06 16:55:12,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:55:12" (3/3) ... [2021-01-06 16:55:12,350 INFO L111 eAbstractionObserver]: Analyzing ICFG Mono4_1.c [2021-01-06 16:55:12,362 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:55:12,369 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 16:55:12,403 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 16:55:12,445 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:55:12,445 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:55:12,446 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:55:12,446 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:55:12,446 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:55:12,446 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:55:12,447 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:55:12,447 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:55:12,472 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2021-01-06 16:55:12,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 16:55:12,482 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:12,483 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 16:55:12,484 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:12,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:12,495 INFO L82 PathProgramCache]: Analyzing trace with hash 889937703, now seen corresponding path program 1 times [2021-01-06 16:55:12,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:12,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782309375] [2021-01-06 16:55:12,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:12,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:12,735 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 16:55:12,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782309375] [2021-01-06 16:55:12,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:55:12,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 16:55:12,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952753079] [2021-01-06 16:55:12,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 16:55:12,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:12,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 16:55:12,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 16:55:12,772 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2021-01-06 16:55:12,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:12,800 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2021-01-06 16:55:12,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 16:55:12,803 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2021-01-06 16:55:12,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:12,816 INFO L225 Difference]: With dead ends: 20 [2021-01-06 16:55:12,816 INFO L226 Difference]: Without dead ends: 8 [2021-01-06 16:55:12,821 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 16:55:12,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-01-06 16:55:12,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-01-06 16:55:12,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-01-06 16:55:12,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2021-01-06 16:55:12,878 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2021-01-06 16:55:12,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:12,878 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-01-06 16:55:12,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 16:55:12,879 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2021-01-06 16:55:12,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 16:55:12,880 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:12,880 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 16:55:12,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:55:12,881 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:12,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:12,883 INFO L82 PathProgramCache]: Analyzing trace with hash 889639793, now seen corresponding path program 1 times [2021-01-06 16:55:12,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:12,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847362955] [2021-01-06 16:55:12,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:12,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:13,033 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 16:55:13,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847362955] [2021-01-06 16:55:13,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:55:13,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 16:55:13,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270459354] [2021-01-06 16:55:13,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 16:55:13,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:13,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 16:55:13,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:55:13,040 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 3 states. [2021-01-06 16:55:13,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:13,088 INFO L93 Difference]: Finished difference Result 16 states and 20 transitions. [2021-01-06 16:55:13,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 16:55:13,090 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2021-01-06 16:55:13,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:13,093 INFO L225 Difference]: With dead ends: 16 [2021-01-06 16:55:13,093 INFO L226 Difference]: Without dead ends: 10 [2021-01-06 16:55:13,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:55:13,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-01-06 16:55:13,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-01-06 16:55:13,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-01-06 16:55:13,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-01-06 16:55:13,107 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2021-01-06 16:55:13,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:13,108 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-01-06 16:55:13,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 16:55:13,109 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-01-06 16:55:13,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 16:55:13,111 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:13,111 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:13,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 16:55:13,114 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:13,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:13,117 INFO L82 PathProgramCache]: Analyzing trace with hash 295691924, now seen corresponding path program 1 times [2021-01-06 16:55:13,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:13,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435119678] [2021-01-06 16:55:13,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:13,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:13,278 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 16:55:13,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435119678] [2021-01-06 16:55:13,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448218643] [2021-01-06 16:55:13,279 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 16:55:13,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:13,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 16:55:13,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:13,665 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 16:55:13,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:13,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 16:55:13,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940819763] [2021-01-06 16:55:13,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 16:55:13,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:13,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 16:55:13,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:55:13,675 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 5 states. [2021-01-06 16:55:13,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:13,783 INFO L93 Difference]: Finished difference Result 18 states and 22 transitions. [2021-01-06 16:55:13,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 16:55:13,786 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2021-01-06 16:55:13,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:13,788 INFO L225 Difference]: With dead ends: 18 [2021-01-06 16:55:13,789 INFO L226 Difference]: Without dead ends: 12 [2021-01-06 16:55:13,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:55:13,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-01-06 16:55:13,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-01-06 16:55:13,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-01-06 16:55:13,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-01-06 16:55:13,807 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2021-01-06 16:55:13,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:13,808 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-01-06 16:55:13,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 16:55:13,809 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-01-06 16:55:13,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 16:55:13,810 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:13,811 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:14,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 16:55:14,026 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:14,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:14,028 INFO L82 PathProgramCache]: Analyzing trace with hash 742440183, now seen corresponding path program 2 times [2021-01-06 16:55:14,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:14,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989452616] [2021-01-06 16:55:14,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:14,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:14,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 16:55:14,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989452616] [2021-01-06 16:55:14,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:55:14,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 16:55:14,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284574381] [2021-01-06 16:55:14,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 16:55:14,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:14,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 16:55:14,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:55:14,141 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 3 states. [2021-01-06 16:55:14,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:14,183 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2021-01-06 16:55:14,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 16:55:14,184 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2021-01-06 16:55:14,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:14,186 INFO L225 Difference]: With dead ends: 18 [2021-01-06 16:55:14,186 INFO L226 Difference]: Without dead ends: 14 [2021-01-06 16:55:14,187 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 16:55:14,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-01-06 16:55:14,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2021-01-06 16:55:14,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-01-06 16:55:14,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-01-06 16:55:14,200 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2021-01-06 16:55:14,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:14,200 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-01-06 16:55:14,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 16:55:14,200 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-01-06 16:55:14,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 16:55:14,201 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:14,202 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:14,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-06 16:55:14,202 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:14,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:14,208 INFO L82 PathProgramCache]: Analyzing trace with hash 572634524, now seen corresponding path program 1 times [2021-01-06 16:55:14,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:14,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210692021] [2021-01-06 16:55:14,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:14,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:14,443 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 16:55:14,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210692021] [2021-01-06 16:55:14,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532645923] [2021-01-06 16:55:14,444 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 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 16:55:14,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:14,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 16:55:14,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:14,640 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:55:14,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:14,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-01-06 16:55:14,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995288226] [2021-01-06 16:55:14,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 16:55:14,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:14,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 16:55:14,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:55:14,644 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 9 states. [2021-01-06 16:55:14,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:14,807 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2021-01-06 16:55:14,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 16:55:14,808 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2021-01-06 16:55:14,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:14,809 INFO L225 Difference]: With dead ends: 29 [2021-01-06 16:55:14,809 INFO L226 Difference]: Without dead ends: 20 [2021-01-06 16:55:14,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-01-06 16:55:14,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-01-06 16:55:14,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2021-01-06 16:55:14,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 16:55:14,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-01-06 16:55:14,816 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2021-01-06 16:55:14,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:14,817 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-01-06 16:55:14,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 16:55:14,817 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-01-06 16:55:14,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 16:55:14,818 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:14,818 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:15,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:15,034 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:15,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:15,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1327998684, now seen corresponding path program 2 times [2021-01-06 16:55:15,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:15,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703847653] [2021-01-06 16:55:15,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:15,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:15,106 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 16:55:15,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703847653] [2021-01-06 16:55:15,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422969737] [2021-01-06 16:55:15,107 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 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 16:55:15,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:55:15,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:15,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 16:55:15,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:15,221 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 16:55:15,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:15,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 16:55:15,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497455712] [2021-01-06 16:55:15,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 16:55:15,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:15,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 16:55:15,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:55:15,225 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 7 states. [2021-01-06 16:55:15,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:15,262 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2021-01-06 16:55:15,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 16:55:15,262 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2021-01-06 16:55:15,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:15,263 INFO L225 Difference]: With dead ends: 26 [2021-01-06 16:55:15,263 INFO L226 Difference]: Without dead ends: 19 [2021-01-06 16:55:15,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:55:15,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-01-06 16:55:15,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-01-06 16:55:15,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 16:55:15,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-01-06 16:55:15,270 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2021-01-06 16:55:15,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:15,270 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-01-06 16:55:15,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 16:55:15,270 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-01-06 16:55:15,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 16:55:15,271 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:15,271 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:15,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:15,485 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:15,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:15,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1229316985, now seen corresponding path program 3 times [2021-01-06 16:55:15,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:15,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920366523] [2021-01-06 16:55:15,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:15,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:15,546 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 16:55:15,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920366523] [2021-01-06 16:55:15,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553410199] [2021-01-06 16:55:15,548 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 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 16:55:15,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 16:55:15,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:15,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 16:55:15,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:15,733 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:55:15,741 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:55:15,759 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-01-06 16:55:15,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:15,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-01-06 16:55:15,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084548065] [2021-01-06 16:55:15,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 16:55:15,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:15,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 16:55:15,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-01-06 16:55:15,772 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 12 states. [2021-01-06 16:55:15,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:15,909 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2021-01-06 16:55:15,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 16:55:15,910 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2021-01-06 16:55:15,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:15,911 INFO L225 Difference]: With dead ends: 35 [2021-01-06 16:55:15,911 INFO L226 Difference]: Without dead ends: 26 [2021-01-06 16:55:15,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-01-06 16:55:15,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-01-06 16:55:15,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2021-01-06 16:55:15,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 16:55:15,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-01-06 16:55:15,919 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 18 [2021-01-06 16:55:15,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:15,920 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-01-06 16:55:15,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 16:55:15,920 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-01-06 16:55:15,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 16:55:15,921 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:15,921 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:16,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:16,138 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:16,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:16,139 INFO L82 PathProgramCache]: Analyzing trace with hash -495138033, now seen corresponding path program 4 times [2021-01-06 16:55:16,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:16,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577954388] [2021-01-06 16:55:16,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:16,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:16,213 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 16:55:16,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577954388] [2021-01-06 16:55:16,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776008233] [2021-01-06 16:55:16,214 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 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 16:55:16,272 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:55:16,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:16,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 16:55:16,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:16,328 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 16:55:16,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:16,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 16:55:16,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78184439] [2021-01-06 16:55:16,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 16:55:16,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:16,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 16:55:16,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:55:16,333 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 9 states. [2021-01-06 16:55:16,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:16,375 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2021-01-06 16:55:16,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 16:55:16,376 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2021-01-06 16:55:16,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:16,377 INFO L225 Difference]: With dead ends: 34 [2021-01-06 16:55:16,377 INFO L226 Difference]: Without dead ends: 25 [2021-01-06 16:55:16,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:55:16,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-01-06 16:55:16,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-01-06 16:55:16,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 16:55:16,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-01-06 16:55:16,384 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 22 [2021-01-06 16:55:16,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:16,385 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-01-06 16:55:16,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 16:55:16,385 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-01-06 16:55:16,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 16:55:16,386 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:16,386 INFO L422 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:16,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:16,602 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:16,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:16,604 INFO L82 PathProgramCache]: Analyzing trace with hash 264845362, now seen corresponding path program 5 times [2021-01-06 16:55:16,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:16,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407822381] [2021-01-06 16:55:16,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:16,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:16,691 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 35 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 16:55:16,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407822381] [2021-01-06 16:55:16,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614292051] [2021-01-06 16:55:16,696 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 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 16:55:16,756 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-01-06 16:55:16,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:16,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 16:55:16,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:16,870 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 35 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 16:55:16,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:16,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 16:55:16,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495769200] [2021-01-06 16:55:16,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 16:55:16,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:16,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 16:55:16,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:55:16,882 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 10 states. [2021-01-06 16:55:16,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:16,949 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2021-01-06 16:55:16,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 16:55:16,950 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2021-01-06 16:55:16,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:16,952 INFO L225 Difference]: With dead ends: 36 [2021-01-06 16:55:16,952 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 16:55:16,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:55:16,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 16:55:16,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-01-06 16:55:16,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 16:55:16,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-01-06 16:55:16,972 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 24 [2021-01-06 16:55:16,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:16,972 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-01-06 16:55:16,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 16:55:16,973 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-01-06 16:55:16,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 16:55:16,974 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:16,975 INFO L422 BasicCegarLoop]: trace histogram [10, 7, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:17,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:17,190 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:17,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:17,191 INFO L82 PathProgramCache]: Analyzing trace with hash 464447637, now seen corresponding path program 6 times [2021-01-06 16:55:17,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:17,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706887018] [2021-01-06 16:55:17,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:17,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:17,345 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 40 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 16:55:17,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706887018] [2021-01-06 16:55:17,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890543152] [2021-01-06 16:55:17,349 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 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 16:55:17,475 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-01-06 16:55:17,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:17,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 16:55:17,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:17,571 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 40 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 16:55:17,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:17,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 16:55:17,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533636882] [2021-01-06 16:55:17,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 16:55:17,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:17,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 16:55:17,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:55:17,575 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 11 states. [2021-01-06 16:55:17,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:17,630 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2021-01-06 16:55:17,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 16:55:17,630 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2021-01-06 16:55:17,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:17,633 INFO L225 Difference]: With dead ends: 38 [2021-01-06 16:55:17,634 INFO L226 Difference]: Without dead ends: 29 [2021-01-06 16:55:17,634 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:55:17,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-01-06 16:55:17,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-01-06 16:55:17,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 16:55:17,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2021-01-06 16:55:17,645 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 26 [2021-01-06 16:55:17,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:17,648 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2021-01-06 16:55:17,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 16:55:17,648 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2021-01-06 16:55:17,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 16:55:17,649 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:17,649 INFO L422 BasicCegarLoop]: trace histogram [11, 8, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:17,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 16:55:17,862 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:17,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:17,863 INFO L82 PathProgramCache]: Analyzing trace with hash -991294408, now seen corresponding path program 7 times [2021-01-06 16:55:17,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:17,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312797688] [2021-01-06 16:55:17,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:17,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:17,984 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 45 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 16:55:17,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312797688] [2021-01-06 16:55:17,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019245212] [2021-01-06 16:55:17,985 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-01-06 16:55:18,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:18,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:18,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:18,105 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 45 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 16:55:18,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:18,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 16:55:18,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747414653] [2021-01-06 16:55:18,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 16:55:18,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:18,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 16:55:18,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 16:55:18,108 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 12 states. [2021-01-06 16:55:18,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:18,165 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2021-01-06 16:55:18,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 16:55:18,166 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2021-01-06 16:55:18,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:18,167 INFO L225 Difference]: With dead ends: 40 [2021-01-06 16:55:18,167 INFO L226 Difference]: Without dead ends: 31 [2021-01-06 16:55:18,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 16:55:18,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-01-06 16:55:18,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-01-06 16:55:18,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 16:55:18,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-01-06 16:55:18,174 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 28 [2021-01-06 16:55:18,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:18,175 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-01-06 16:55:18,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 16:55:18,175 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-01-06 16:55:18,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-01-06 16:55:18,176 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:18,177 INFO L422 BasicCegarLoop]: trace histogram [12, 9, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:18,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-01-06 16:55:18,392 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:18,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:18,393 INFO L82 PathProgramCache]: Analyzing trace with hash 199938843, now seen corresponding path program 8 times [2021-01-06 16:55:18,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:18,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405203539] [2021-01-06 16:55:18,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:18,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:18,504 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 50 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 16:55:18,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405203539] [2021-01-06 16:55:18,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356693014] [2021-01-06 16:55:18,505 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 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 16:55:18,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:55:18,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:18,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 16:55:18,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:18,593 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 50 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 16:55:18,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:18,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 16:55:18,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736073703] [2021-01-06 16:55:18,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 16:55:18,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:18,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 16:55:18,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:55:18,595 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 13 states. [2021-01-06 16:55:18,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:18,639 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2021-01-06 16:55:18,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 16:55:18,640 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2021-01-06 16:55:18,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:18,640 INFO L225 Difference]: With dead ends: 42 [2021-01-06 16:55:18,640 INFO L226 Difference]: Without dead ends: 33 [2021-01-06 16:55:18,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:55:18,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-01-06 16:55:18,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-01-06 16:55:18,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 16:55:18,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-01-06 16:55:18,646 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 30 [2021-01-06 16:55:18,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:18,647 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-01-06 16:55:18,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 16:55:18,647 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-01-06 16:55:18,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-06 16:55:18,648 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:18,648 INFO L422 BasicCegarLoop]: trace histogram [13, 10, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:18,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:18,862 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:18,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:18,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1781174978, now seen corresponding path program 9 times [2021-01-06 16:55:18,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:18,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178919918] [2021-01-06 16:55:18,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:18,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:19,008 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 55 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 16:55:19,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178919918] [2021-01-06 16:55:19,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984580632] [2021-01-06 16:55:19,010 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 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 16:55:19,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 16:55:19,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:19,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 16:55:19,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:19,167 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:55:19,171 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:55:19,194 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-01-06 16:55:19,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:19,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 19 [2021-01-06 16:55:19,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872433933] [2021-01-06 16:55:19,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 16:55:19,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:19,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 16:55:19,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-01-06 16:55:19,197 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 19 states. [2021-01-06 16:55:19,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:19,517 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2021-01-06 16:55:19,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 16:55:19,518 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 32 [2021-01-06 16:55:19,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:19,519 INFO L225 Difference]: With dead ends: 51 [2021-01-06 16:55:19,519 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 16:55:19,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=289, Invalid=641, Unknown=0, NotChecked=0, Total=930 [2021-01-06 16:55:19,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 16:55:19,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2021-01-06 16:55:19,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 16:55:19,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2021-01-06 16:55:19,527 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 32 [2021-01-06 16:55:19,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:19,528 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2021-01-06 16:55:19,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 16:55:19,528 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2021-01-06 16:55:19,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 16:55:19,529 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:19,530 INFO L422 BasicCegarLoop]: trace histogram [15, 11, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:19,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:19,746 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:19,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:19,747 INFO L82 PathProgramCache]: Analyzing trace with hash 2051424454, now seen corresponding path program 10 times [2021-01-06 16:55:19,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:19,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165032741] [2021-01-06 16:55:19,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:19,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:19,926 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 84 proven. 132 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 16:55:19,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165032741] [2021-01-06 16:55:19,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404636015] [2021-01-06 16:55:19,927 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 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 16:55:19,974 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:55:19,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:19,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 16:55:19,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:20,065 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 84 proven. 132 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 16:55:20,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:20,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 16:55:20,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139474554] [2021-01-06 16:55:20,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 16:55:20,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:20,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 16:55:20,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 16:55:20,069 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 15 states. [2021-01-06 16:55:20,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:20,140 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2021-01-06 16:55:20,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 16:55:20,141 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2021-01-06 16:55:20,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:20,142 INFO L225 Difference]: With dead ends: 50 [2021-01-06 16:55:20,142 INFO L226 Difference]: Without dead ends: 39 [2021-01-06 16:55:20,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 16:55:20,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-01-06 16:55:20,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-01-06 16:55:20,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 16:55:20,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2021-01-06 16:55:20,150 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 36 [2021-01-06 16:55:20,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:20,151 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2021-01-06 16:55:20,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 16:55:20,151 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2021-01-06 16:55:20,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-06 16:55:20,152 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:20,152 INFO L422 BasicCegarLoop]: trace histogram [16, 12, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:20,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 16:55:20,366 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:20,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:20,367 INFO L82 PathProgramCache]: Analyzing trace with hash 667907241, now seen corresponding path program 11 times [2021-01-06 16:55:20,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:20,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286419898] [2021-01-06 16:55:20,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:20,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:20,527 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 91 proven. 156 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 16:55:20,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286419898] [2021-01-06 16:55:20,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170740889] [2021-01-06 16:55:20,528 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 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 16:55:20,598 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-01-06 16:55:20,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:20,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 16:55:20,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:20,730 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 91 proven. 156 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 16:55:20,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:20,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 16:55:20,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592406969] [2021-01-06 16:55:20,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 16:55:20,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:20,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 16:55:20,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 16:55:20,735 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 16 states. [2021-01-06 16:55:20,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:20,811 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2021-01-06 16:55:20,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 16:55:20,812 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2021-01-06 16:55:20,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:20,813 INFO L225 Difference]: With dead ends: 52 [2021-01-06 16:55:20,813 INFO L226 Difference]: Without dead ends: 41 [2021-01-06 16:55:20,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 16:55:20,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-01-06 16:55:20,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-01-06 16:55:20,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-01-06 16:55:20,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2021-01-06 16:55:20,837 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 38 [2021-01-06 16:55:20,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:20,837 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2021-01-06 16:55:20,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 16:55:20,838 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2021-01-06 16:55:20,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 16:55:20,838 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:20,839 INFO L422 BasicCegarLoop]: trace histogram [17, 13, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:21,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 16:55:21,041 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:21,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:21,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1747239988, now seen corresponding path program 12 times [2021-01-06 16:55:21,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:21,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173606396] [2021-01-06 16:55:21,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:21,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:21,243 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 98 proven. 182 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 16:55:21,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173606396] [2021-01-06 16:55:21,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096404295] [2021-01-06 16:55:21,244 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 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 16:55:21,318 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-01-06 16:55:21,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:21,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 16:55:21,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:21,463 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:55:21,468 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:55:21,492 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 107 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-01-06 16:55:21,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:21,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 23 [2021-01-06 16:55:21,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994987623] [2021-01-06 16:55:21,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 16:55:21,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:21,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 16:55:21,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2021-01-06 16:55:21,497 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 23 states. [2021-01-06 16:55:21,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:21,802 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2021-01-06 16:55:21,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 16:55:21,803 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 40 [2021-01-06 16:55:21,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:21,803 INFO L225 Difference]: With dead ends: 61 [2021-01-06 16:55:21,804 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 16:55:21,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=444, Invalid=962, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 16:55:21,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 16:55:21,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2021-01-06 16:55:21,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-01-06 16:55:21,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2021-01-06 16:55:21,811 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 40 [2021-01-06 16:55:21,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:21,812 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2021-01-06 16:55:21,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 16:55:21,812 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2021-01-06 16:55:21,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-01-06 16:55:21,813 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:21,813 INFO L422 BasicCegarLoop]: trace histogram [19, 14, 5, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:22,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 16:55:22,028 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:22,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:22,029 INFO L82 PathProgramCache]: Analyzing trace with hash 2044022996, now seen corresponding path program 13 times [2021-01-06 16:55:22,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:22,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767374847] [2021-01-06 16:55:22,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:22,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:22,212 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 135 proven. 210 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 16:55:22,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767374847] [2021-01-06 16:55:22,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123543797] [2021-01-06 16:55:22,213 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 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 16:55:22,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:22,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 16:55:22,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:22,337 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 135 proven. 210 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 16:55:22,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:22,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 16:55:22,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266416175] [2021-01-06 16:55:22,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 16:55:22,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:22,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 16:55:22,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 16:55:22,340 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand 18 states. [2021-01-06 16:55:22,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:22,419 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2021-01-06 16:55:22,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 16:55:22,420 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2021-01-06 16:55:22,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:22,421 INFO L225 Difference]: With dead ends: 60 [2021-01-06 16:55:22,421 INFO L226 Difference]: Without dead ends: 47 [2021-01-06 16:55:22,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 16:55:22,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-01-06 16:55:22,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-01-06 16:55:22,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-01-06 16:55:22,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2021-01-06 16:55:22,428 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 44 [2021-01-06 16:55:22,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:22,428 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2021-01-06 16:55:22,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 16:55:22,429 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2021-01-06 16:55:22,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 16:55:22,430 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:22,430 INFO L422 BasicCegarLoop]: trace histogram [20, 15, 5, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:22,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:22,644 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:22,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:22,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1456868937, now seen corresponding path program 14 times [2021-01-06 16:55:22,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:22,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643415015] [2021-01-06 16:55:22,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:22,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:22,831 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 144 proven. 240 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 16:55:22,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643415015] [2021-01-06 16:55:22,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326880389] [2021-01-06 16:55:22,832 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 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 16:55:22,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:55:22,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:22,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 16:55:22,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:22,989 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 144 proven. 240 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 16:55:22,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:22,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 16:55:22,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624126583] [2021-01-06 16:55:22,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 16:55:22,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:22,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 16:55:22,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 16:55:22,993 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand 19 states. [2021-01-06 16:55:23,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:23,071 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2021-01-06 16:55:23,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 16:55:23,071 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 46 [2021-01-06 16:55:23,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:23,072 INFO L225 Difference]: With dead ends: 62 [2021-01-06 16:55:23,072 INFO L226 Difference]: Without dead ends: 49 [2021-01-06 16:55:23,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 16:55:23,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-01-06 16:55:23,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-01-06 16:55:23,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-01-06 16:55:23,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2021-01-06 16:55:23,080 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 46 [2021-01-06 16:55:23,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:23,080 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2021-01-06 16:55:23,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 16:55:23,080 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2021-01-06 16:55:23,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-06 16:55:23,081 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:23,082 INFO L422 BasicCegarLoop]: trace histogram [21, 16, 5, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:23,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 16:55:23,297 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:23,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:23,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1440343514, now seen corresponding path program 15 times [2021-01-06 16:55:23,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:23,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285430533] [2021-01-06 16:55:23,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:23,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:23,495 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 153 proven. 272 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 16:55:23,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285430533] [2021-01-06 16:55:23,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217583996] [2021-01-06 16:55:23,496 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 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 16:55:23,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-01-06 16:55:23,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:23,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 16:55:23,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:23,682 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:55:23,684 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:55:23,706 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-01-06 16:55:23,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:23,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10] total 27 [2021-01-06 16:55:23,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882130664] [2021-01-06 16:55:23,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 16:55:23,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:23,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 16:55:23,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=499, Unknown=0, NotChecked=0, Total=702 [2021-01-06 16:55:23,710 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand 27 states. [2021-01-06 16:55:24,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:24,099 INFO L93 Difference]: Finished difference Result 71 states and 84 transitions. [2021-01-06 16:55:24,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 16:55:24,099 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 48 [2021-01-06 16:55:24,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:24,100 INFO L225 Difference]: With dead ends: 71 [2021-01-06 16:55:24,100 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 16:55:24,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=633, Invalid=1347, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 16:55:24,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 16:55:24,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2021-01-06 16:55:24,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-01-06 16:55:24,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2021-01-06 16:55:24,109 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 48 [2021-01-06 16:55:24,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:24,109 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2021-01-06 16:55:24,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 16:55:24,109 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2021-01-06 16:55:24,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-01-06 16:55:24,110 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:24,110 INFO L422 BasicCegarLoop]: trace histogram [23, 17, 6, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:24,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:24,325 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:24,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:24,326 INFO L82 PathProgramCache]: Analyzing trace with hash 2006408290, now seen corresponding path program 16 times [2021-01-06 16:55:24,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:24,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818496442] [2021-01-06 16:55:24,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:24,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:24,544 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 198 proven. 306 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-01-06 16:55:24,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818496442] [2021-01-06 16:55:24,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171342018] [2021-01-06 16:55:24,546 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 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 16:55:24,594 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:55:24,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:24,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 16:55:24,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:24,714 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 198 proven. 306 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-01-06 16:55:24,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:24,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-01-06 16:55:24,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281990097] [2021-01-06 16:55:24,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 16:55:24,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:24,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 16:55:24,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 16:55:24,718 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 21 states. [2021-01-06 16:55:24,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:24,806 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2021-01-06 16:55:24,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 16:55:24,806 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 52 [2021-01-06 16:55:24,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:24,807 INFO L225 Difference]: With dead ends: 70 [2021-01-06 16:55:24,807 INFO L226 Difference]: Without dead ends: 55 [2021-01-06 16:55:24,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 16:55:24,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-01-06 16:55:24,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-01-06 16:55:24,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2021-01-06 16:55:24,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2021-01-06 16:55:24,816 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 52 [2021-01-06 16:55:24,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:24,818 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2021-01-06 16:55:24,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 16:55:24,818 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2021-01-06 16:55:24,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-01-06 16:55:24,819 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:24,819 INFO L422 BasicCegarLoop]: trace histogram [24, 18, 6, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:25,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:25,035 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:25,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:25,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1358588485, now seen corresponding path program 17 times [2021-01-06 16:55:25,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:25,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543121980] [2021-01-06 16:55:25,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:25,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:25,338 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 209 proven. 342 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-01-06 16:55:25,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543121980] [2021-01-06 16:55:25,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023446330] [2021-01-06 16:55:25,339 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 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 16:55:25,396 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2021-01-06 16:55:25,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:25,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 16:55:25,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:25,484 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 209 proven. 342 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-01-06 16:55:25,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:25,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-01-06 16:55:25,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662923421] [2021-01-06 16:55:25,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 16:55:25,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:25,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 16:55:25,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 16:55:25,486 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand 22 states. [2021-01-06 16:55:25,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:25,571 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2021-01-06 16:55:25,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 16:55:25,572 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 54 [2021-01-06 16:55:25,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:25,573 INFO L225 Difference]: With dead ends: 72 [2021-01-06 16:55:25,573 INFO L226 Difference]: Without dead ends: 57 [2021-01-06 16:55:25,574 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 16:55:25,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-01-06 16:55:25,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-01-06 16:55:25,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-01-06 16:55:25,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2021-01-06 16:55:25,580 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 54 [2021-01-06 16:55:25,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:25,580 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2021-01-06 16:55:25,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 16:55:25,580 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2021-01-06 16:55:25,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-06 16:55:25,581 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:25,581 INFO L422 BasicCegarLoop]: trace histogram [25, 19, 6, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:25,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-06 16:55:25,796 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:25,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:25,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1574013800, now seen corresponding path program 18 times [2021-01-06 16:55:25,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:25,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610250002] [2021-01-06 16:55:25,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:25,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:26,108 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 220 proven. 380 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-01-06 16:55:26,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610250002] [2021-01-06 16:55:26,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627877239] [2021-01-06 16:55:26,109 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 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 16:55:26,173 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2021-01-06 16:55:26,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:26,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 16:55:26,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:26,350 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:55:26,352 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:55:26,374 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2021-01-06 16:55:26,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:26,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 11] total 31 [2021-01-06 16:55:26,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880410132] [2021-01-06 16:55:26,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 16:55:26,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:26,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 16:55:26,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=659, Unknown=0, NotChecked=0, Total=930 [2021-01-06 16:55:26,378 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand 31 states. [2021-01-06 16:55:26,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:26,818 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2021-01-06 16:55:26,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 16:55:26,821 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 56 [2021-01-06 16:55:26,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:26,821 INFO L225 Difference]: With dead ends: 81 [2021-01-06 16:55:26,822 INFO L226 Difference]: Without dead ends: 64 [2021-01-06 16:55:26,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=856, Invalid=1796, Unknown=0, NotChecked=0, Total=2652 [2021-01-06 16:55:26,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-01-06 16:55:26,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2021-01-06 16:55:26,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2021-01-06 16:55:26,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2021-01-06 16:55:26,830 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 56 [2021-01-06 16:55:26,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:26,830 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2021-01-06 16:55:26,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-01-06 16:55:26,830 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2021-01-06 16:55:26,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-01-06 16:55:26,831 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:26,831 INFO L422 BasicCegarLoop]: trace histogram [27, 20, 7, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:27,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:27,046 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:27,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:27,047 INFO L82 PathProgramCache]: Analyzing trace with hash -821787792, now seen corresponding path program 19 times [2021-01-06 16:55:27,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:27,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017954164] [2021-01-06 16:55:27,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:27,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:27,307 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 273 proven. 420 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 16:55:27,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017954164] [2021-01-06 16:55:27,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137503788] [2021-01-06 16:55:27,308 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 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 16:55:27,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:27,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 16:55:27,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:27,461 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 273 proven. 420 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 16:55:27,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:27,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-01-06 16:55:27,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211108311] [2021-01-06 16:55:27,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 16:55:27,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:27,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 16:55:27,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 16:55:27,467 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand 24 states. [2021-01-06 16:55:27,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:27,546 INFO L93 Difference]: Finished difference Result 80 states and 94 transitions. [2021-01-06 16:55:27,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 16:55:27,547 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 60 [2021-01-06 16:55:27,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:27,547 INFO L225 Difference]: With dead ends: 80 [2021-01-06 16:55:27,547 INFO L226 Difference]: Without dead ends: 63 [2021-01-06 16:55:27,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 16:55:27,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-01-06 16:55:27,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-01-06 16:55:27,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-01-06 16:55:27,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2021-01-06 16:55:27,559 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 60 [2021-01-06 16:55:27,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:27,560 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2021-01-06 16:55:27,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 16:55:27,560 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2021-01-06 16:55:27,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-01-06 16:55:27,560 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:27,561 INFO L422 BasicCegarLoop]: trace histogram [28, 21, 7, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:27,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-06 16:55:27,775 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:27,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:27,776 INFO L82 PathProgramCache]: Analyzing trace with hash -2017919405, now seen corresponding path program 20 times [2021-01-06 16:55:27,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:27,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938627535] [2021-01-06 16:55:27,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:27,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:28,073 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 286 proven. 462 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 16:55:28,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938627535] [2021-01-06 16:55:28,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247903912] [2021-01-06 16:55:28,074 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 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 16:55:28,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:55:28,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:28,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 16:55:28,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:28,220 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 286 proven. 462 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 16:55:28,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:28,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-01-06 16:55:28,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094267593] [2021-01-06 16:55:28,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 16:55:28,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:28,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 16:55:28,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-01-06 16:55:28,223 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand 25 states. [2021-01-06 16:55:28,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:28,295 INFO L93 Difference]: Finished difference Result 82 states and 96 transitions. [2021-01-06 16:55:28,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 16:55:28,296 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 62 [2021-01-06 16:55:28,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:28,296 INFO L225 Difference]: With dead ends: 82 [2021-01-06 16:55:28,297 INFO L226 Difference]: Without dead ends: 65 [2021-01-06 16:55:28,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-01-06 16:55:28,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-01-06 16:55:28,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-01-06 16:55:28,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-01-06 16:55:28,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2021-01-06 16:55:28,302 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 62 [2021-01-06 16:55:28,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:28,303 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2021-01-06 16:55:28,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 16:55:28,303 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2021-01-06 16:55:28,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-01-06 16:55:28,304 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:28,304 INFO L422 BasicCegarLoop]: trace histogram [29, 22, 7, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:28,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-06 16:55:28,516 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:28,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:28,517 INFO L82 PathProgramCache]: Analyzing trace with hash -449164170, now seen corresponding path program 21 times [2021-01-06 16:55:28,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:28,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400672364] [2021-01-06 16:55:28,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:28,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:28,847 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 299 proven. 506 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 16:55:28,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400672364] [2021-01-06 16:55:28,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720331356] [2021-01-06 16:55:28,848 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 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 16:55:28,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-01-06 16:55:28,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:28,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 16:55:28,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:29,109 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:55:29,112 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:55:29,141 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2021-01-06 16:55:29,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:29,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 12] total 35 [2021-01-06 16:55:29,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013806145] [2021-01-06 16:55:29,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-01-06 16:55:29,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:29,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-01-06 16:55:29,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=841, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 16:55:29,145 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand 35 states. [2021-01-06 16:55:29,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:29,724 INFO L93 Difference]: Finished difference Result 91 states and 108 transitions. [2021-01-06 16:55:29,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-06 16:55:29,724 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 64 [2021-01-06 16:55:29,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:29,725 INFO L225 Difference]: With dead ends: 91 [2021-01-06 16:55:29,725 INFO L226 Difference]: Without dead ends: 72 [2021-01-06 16:55:29,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1113, Invalid=2309, Unknown=0, NotChecked=0, Total=3422 [2021-01-06 16:55:29,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-01-06 16:55:29,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2021-01-06 16:55:29,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2021-01-06 16:55:29,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2021-01-06 16:55:29,734 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 64 [2021-01-06 16:55:29,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:29,734 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2021-01-06 16:55:29,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2021-01-06 16:55:29,734 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2021-01-06 16:55:29,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-01-06 16:55:29,735 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:29,735 INFO L422 BasicCegarLoop]: trace histogram [31, 23, 8, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:29,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:29,948 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:29,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:29,949 INFO L82 PathProgramCache]: Analyzing trace with hash -2062752258, now seen corresponding path program 22 times [2021-01-06 16:55:29,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:29,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034528994] [2021-01-06 16:55:29,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:29,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:30,321 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 360 proven. 552 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-01-06 16:55:30,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034528994] [2021-01-06 16:55:30,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045994414] [2021-01-06 16:55:30,322 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 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 16:55:30,389 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:55:30,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:30,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 16:55:30,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:30,507 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 360 proven. 552 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-01-06 16:55:30,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:30,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-01-06 16:55:30,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639346737] [2021-01-06 16:55:30,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 16:55:30,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:30,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 16:55:30,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-01-06 16:55:30,512 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand 27 states. [2021-01-06 16:55:30,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:30,594 INFO L93 Difference]: Finished difference Result 90 states and 106 transitions. [2021-01-06 16:55:30,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 16:55:30,595 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 68 [2021-01-06 16:55:30,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:30,596 INFO L225 Difference]: With dead ends: 90 [2021-01-06 16:55:30,596 INFO L226 Difference]: Without dead ends: 71 [2021-01-06 16:55:30,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-01-06 16:55:30,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-01-06 16:55:30,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-01-06 16:55:30,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2021-01-06 16:55:30,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2021-01-06 16:55:30,602 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 68 [2021-01-06 16:55:30,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:30,602 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2021-01-06 16:55:30,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 16:55:30,602 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2021-01-06 16:55:30,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-01-06 16:55:30,603 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:30,603 INFO L422 BasicCegarLoop]: trace histogram [32, 24, 8, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:30,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-06 16:55:30,817 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:30,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:30,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1599458785, now seen corresponding path program 23 times [2021-01-06 16:55:30,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:30,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130769235] [2021-01-06 16:55:30,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:30,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:31,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 375 proven. 600 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-01-06 16:55:31,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130769235] [2021-01-06 16:55:31,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235387716] [2021-01-06 16:55:31,180 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 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 16:55:31,253 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 33 check-sat command(s) [2021-01-06 16:55:31,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:31,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 16:55:31,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:31,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 375 proven. 600 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-01-06 16:55:31,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:31,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-01-06 16:55:31,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455720055] [2021-01-06 16:55:31,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 16:55:31,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:31,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 16:55:31,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 16:55:31,362 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand 28 states. [2021-01-06 16:55:31,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:31,460 INFO L93 Difference]: Finished difference Result 92 states and 108 transitions. [2021-01-06 16:55:31,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 16:55:31,461 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 70 [2021-01-06 16:55:31,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:31,462 INFO L225 Difference]: With dead ends: 92 [2021-01-06 16:55:31,462 INFO L226 Difference]: Without dead ends: 73 [2021-01-06 16:55:31,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 16:55:31,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-01-06 16:55:31,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-01-06 16:55:31,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-01-06 16:55:31,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 81 transitions. [2021-01-06 16:55:31,468 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 81 transitions. Word has length 70 [2021-01-06 16:55:31,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:31,468 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 81 transitions. [2021-01-06 16:55:31,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 16:55:31,468 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 81 transitions. [2021-01-06 16:55:31,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-01-06 16:55:31,469 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:31,469 INFO L422 BasicCegarLoop]: trace histogram [33, 25, 8, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:31,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:31,683 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:31,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:31,684 INFO L82 PathProgramCache]: Analyzing trace with hash -888911612, now seen corresponding path program 24 times [2021-01-06 16:55:31,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:31,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899963865] [2021-01-06 16:55:31,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:31,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:32,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 390 proven. 650 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-01-06 16:55:32,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899963865] [2021-01-06 16:55:32,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117463535] [2021-01-06 16:55:32,042 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 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 16:55:32,122 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-01-06 16:55:32,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:32,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 16:55:32,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:32,395 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:55:32,401 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:55:32,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 439 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2021-01-06 16:55:32,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:32,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 13] total 39 [2021-01-06 16:55:32,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381785879] [2021-01-06 16:55:32,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-01-06 16:55:32,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:32,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-01-06 16:55:32,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=1045, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 16:55:32,435 INFO L87 Difference]: Start difference. First operand 73 states and 81 transitions. Second operand 39 states. [2021-01-06 16:55:33,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:33,140 INFO L93 Difference]: Finished difference Result 101 states and 120 transitions. [2021-01-06 16:55:33,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-06 16:55:33,140 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 72 [2021-01-06 16:55:33,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:33,141 INFO L225 Difference]: With dead ends: 101 [2021-01-06 16:55:33,142 INFO L226 Difference]: Without dead ends: 80 [2021-01-06 16:55:33,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1404, Invalid=2886, Unknown=0, NotChecked=0, Total=4290 [2021-01-06 16:55:33,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-01-06 16:55:33,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2021-01-06 16:55:33,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2021-01-06 16:55:33,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2021-01-06 16:55:33,149 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 72 [2021-01-06 16:55:33,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:33,150 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2021-01-06 16:55:33,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2021-01-06 16:55:33,150 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2021-01-06 16:55:33,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-06 16:55:33,151 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:33,151 INFO L422 BasicCegarLoop]: trace histogram [35, 26, 9, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:33,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 16:55:33,366 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:33,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:33,367 INFO L82 PathProgramCache]: Analyzing trace with hash -904354804, now seen corresponding path program 25 times [2021-01-06 16:55:33,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:33,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467792344] [2021-01-06 16:55:33,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:33,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:33,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 459 proven. 702 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-01-06 16:55:33,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467792344] [2021-01-06 16:55:33,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233401723] [2021-01-06 16:55:33,800 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 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 16:55:33,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:33,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 16:55:33,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:33,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 459 proven. 702 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-01-06 16:55:33,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:33,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-01-06 16:55:33,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014385071] [2021-01-06 16:55:33,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-01-06 16:55:33,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:33,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-01-06 16:55:33,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-01-06 16:55:33,974 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand 30 states. [2021-01-06 16:55:34,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:34,119 INFO L93 Difference]: Finished difference Result 100 states and 118 transitions. [2021-01-06 16:55:34,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 16:55:34,119 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 76 [2021-01-06 16:55:34,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:34,121 INFO L225 Difference]: With dead ends: 100 [2021-01-06 16:55:34,121 INFO L226 Difference]: Without dead ends: 79 [2021-01-06 16:55:34,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-01-06 16:55:34,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-01-06 16:55:34,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-01-06 16:55:34,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-01-06 16:55:34,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2021-01-06 16:55:34,129 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 76 [2021-01-06 16:55:34,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:34,130 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2021-01-06 16:55:34,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2021-01-06 16:55:34,130 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2021-01-06 16:55:34,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-01-06 16:55:34,130 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:34,131 INFO L422 BasicCegarLoop]: trace histogram [36, 27, 9, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:34,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 16:55:34,343 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:34,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:34,344 INFO L82 PathProgramCache]: Analyzing trace with hash 356055279, now seen corresponding path program 26 times [2021-01-06 16:55:34,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:34,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441486988] [2021-01-06 16:55:34,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:34,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:34,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 476 proven. 756 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-01-06 16:55:34,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441486988] [2021-01-06 16:55:34,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957968332] [2021-01-06 16:55:34,830 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 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 16:55:34,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:55:34,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:34,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 29 conjunts are in the unsatisfiable core [2021-01-06 16:55:34,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:35,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 476 proven. 756 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-01-06 16:55:35,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:35,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-01-06 16:55:35,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680734250] [2021-01-06 16:55:35,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 16:55:35,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:35,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 16:55:35,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-01-06 16:55:35,040 INFO L87 Difference]: Start difference. First operand 79 states and 88 transitions. Second operand 31 states. [2021-01-06 16:55:35,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:35,205 INFO L93 Difference]: Finished difference Result 102 states and 120 transitions. [2021-01-06 16:55:35,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 16:55:35,206 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 78 [2021-01-06 16:55:35,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:35,207 INFO L225 Difference]: With dead ends: 102 [2021-01-06 16:55:35,207 INFO L226 Difference]: Without dead ends: 81 [2021-01-06 16:55:35,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-01-06 16:55:35,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-01-06 16:55:35,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-01-06 16:55:35,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2021-01-06 16:55:35,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2021-01-06 16:55:35,217 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 78 [2021-01-06 16:55:35,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:35,218 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2021-01-06 16:55:35,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-01-06 16:55:35,218 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2021-01-06 16:55:35,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-01-06 16:55:35,219 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:35,219 INFO L422 BasicCegarLoop]: trace histogram [37, 28, 9, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:35,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:35,434 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:35,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:35,434 INFO L82 PathProgramCache]: Analyzing trace with hash 429367570, now seen corresponding path program 27 times [2021-01-06 16:55:35,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:35,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107566971] [2021-01-06 16:55:35,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:35,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:35,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 493 proven. 812 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-01-06 16:55:35,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107566971] [2021-01-06 16:55:35,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638521726] [2021-01-06 16:55:35,952 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 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 16:55:36,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-01-06 16:55:36,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:36,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 16:55:36,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:36,326 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:55:36,327 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:55:36,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 557 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2021-01-06 16:55:36,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:36,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 14] total 43 [2021-01-06 16:55:36,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937779776] [2021-01-06 16:55:36,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-01-06 16:55:36,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:36,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-01-06 16:55:36,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=535, Invalid=1271, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 16:55:36,363 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand 43 states. [2021-01-06 16:55:37,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:37,177 INFO L93 Difference]: Finished difference Result 111 states and 132 transitions. [2021-01-06 16:55:37,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-06 16:55:37,177 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 80 [2021-01-06 16:55:37,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:37,178 INFO L225 Difference]: With dead ends: 111 [2021-01-06 16:55:37,178 INFO L226 Difference]: Without dead ends: 88 [2021-01-06 16:55:37,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1729, Invalid=3527, Unknown=0, NotChecked=0, Total=5256 [2021-01-06 16:55:37,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-01-06 16:55:37,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 85. [2021-01-06 16:55:37,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2021-01-06 16:55:37,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 95 transitions. [2021-01-06 16:55:37,189 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 95 transitions. Word has length 80 [2021-01-06 16:55:37,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:37,189 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 95 transitions. [2021-01-06 16:55:37,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2021-01-06 16:55:37,190 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 95 transitions. [2021-01-06 16:55:37,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-01-06 16:55:37,190 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:37,190 INFO L422 BasicCegarLoop]: trace histogram [39, 29, 10, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:37,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:37,405 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:37,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:37,405 INFO L82 PathProgramCache]: Analyzing trace with hash -66593382, now seen corresponding path program 28 times [2021-01-06 16:55:37,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:37,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484827887] [2021-01-06 16:55:37,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:37,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:37,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 570 proven. 870 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-01-06 16:55:37,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484827887] [2021-01-06 16:55:37,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120020169] [2021-01-06 16:55:37,910 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 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 16:55:37,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:55:37,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:37,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 16:55:37,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:38,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 570 proven. 870 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-01-06 16:55:38,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:38,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-01-06 16:55:38,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572608787] [2021-01-06 16:55:38,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 16:55:38,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:38,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 16:55:38,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 16:55:38,089 INFO L87 Difference]: Start difference. First operand 85 states and 95 transitions. Second operand 33 states. [2021-01-06 16:55:38,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:38,218 INFO L93 Difference]: Finished difference Result 110 states and 130 transitions. [2021-01-06 16:55:38,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 16:55:38,218 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 84 [2021-01-06 16:55:38,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:38,219 INFO L225 Difference]: With dead ends: 110 [2021-01-06 16:55:38,220 INFO L226 Difference]: Without dead ends: 87 [2021-01-06 16:55:38,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 16:55:38,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-01-06 16:55:38,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-01-06 16:55:38,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2021-01-06 16:55:38,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 97 transitions. [2021-01-06 16:55:38,227 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 97 transitions. Word has length 84 [2021-01-06 16:55:38,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:38,227 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 97 transitions. [2021-01-06 16:55:38,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 16:55:38,228 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 97 transitions. [2021-01-06 16:55:38,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-06 16:55:38,229 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:38,229 INFO L422 BasicCegarLoop]: trace histogram [40, 30, 10, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:38,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-01-06 16:55:38,443 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:38,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:38,445 INFO L82 PathProgramCache]: Analyzing trace with hash 339910525, now seen corresponding path program 29 times [2021-01-06 16:55:38,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:38,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131060484] [2021-01-06 16:55:38,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:38,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:38,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 589 proven. 930 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-01-06 16:55:38,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131060484] [2021-01-06 16:55:38,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922079772] [2021-01-06 16:55:38,994 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 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 16:55:39,064 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 41 check-sat command(s) [2021-01-06 16:55:39,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:39,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 32 conjunts are in the unsatisfiable core [2021-01-06 16:55:39,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:39,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 589 proven. 930 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-01-06 16:55:39,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:39,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-01-06 16:55:39,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599379935] [2021-01-06 16:55:39,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-01-06 16:55:39,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:39,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-01-06 16:55:39,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 16:55:39,171 INFO L87 Difference]: Start difference. First operand 87 states and 97 transitions. Second operand 34 states. [2021-01-06 16:55:39,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:39,321 INFO L93 Difference]: Finished difference Result 112 states and 132 transitions. [2021-01-06 16:55:39,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-06 16:55:39,322 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 86 [2021-01-06 16:55:39,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:39,323 INFO L225 Difference]: With dead ends: 112 [2021-01-06 16:55:39,323 INFO L226 Difference]: Without dead ends: 89 [2021-01-06 16:55:39,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 16:55:39,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-01-06 16:55:39,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-01-06 16:55:39,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2021-01-06 16:55:39,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2021-01-06 16:55:39,333 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 86 [2021-01-06 16:55:39,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:39,334 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2021-01-06 16:55:39,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2021-01-06 16:55:39,334 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2021-01-06 16:55:39,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-01-06 16:55:39,335 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:39,335 INFO L422 BasicCegarLoop]: trace histogram [41, 31, 10, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:39,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:39,549 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:39,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:39,550 INFO L82 PathProgramCache]: Analyzing trace with hash 148141216, now seen corresponding path program 30 times [2021-01-06 16:55:39,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:39,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704450763] [2021-01-06 16:55:39,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:39,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:40,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 608 proven. 992 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-01-06 16:55:40,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704450763] [2021-01-06 16:55:40,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304645183] [2021-01-06 16:55:40,136 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 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 16:55:40,230 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 39 check-sat command(s) [2021-01-06 16:55:40,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:40,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 16:55:40,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:40,591 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:55:40,593 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:55:40,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 689 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2021-01-06 16:55:40,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:40,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 15] total 47 [2021-01-06 16:55:40,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624899486] [2021-01-06 16:55:40,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-01-06 16:55:40,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:40,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-01-06 16:55:40,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=643, Invalid=1519, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 16:55:40,636 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand 47 states. [2021-01-06 16:55:41,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:41,625 INFO L93 Difference]: Finished difference Result 121 states and 144 transitions. [2021-01-06 16:55:41,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-06 16:55:41,626 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 88 [2021-01-06 16:55:41,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:41,626 INFO L225 Difference]: With dead ends: 121 [2021-01-06 16:55:41,626 INFO L226 Difference]: Without dead ends: 96 [2021-01-06 16:55:41,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2088, Invalid=4232, Unknown=0, NotChecked=0, Total=6320 [2021-01-06 16:55:41,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-01-06 16:55:41,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93. [2021-01-06 16:55:41,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2021-01-06 16:55:41,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 104 transitions. [2021-01-06 16:55:41,635 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 104 transitions. Word has length 88 [2021-01-06 16:55:41,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:41,635 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 104 transitions. [2021-01-06 16:55:41,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2021-01-06 16:55:41,635 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 104 transitions. [2021-01-06 16:55:41,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-01-06 16:55:41,636 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:41,636 INFO L422 BasicCegarLoop]: trace histogram [43, 32, 11, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:41,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-01-06 16:55:41,837 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:41,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:41,838 INFO L82 PathProgramCache]: Analyzing trace with hash 674411176, now seen corresponding path program 31 times [2021-01-06 16:55:41,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:41,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757683519] [2021-01-06 16:55:41,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:41,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:42,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 693 proven. 1056 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 16:55:42,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757683519] [2021-01-06 16:55:42,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952308438] [2021-01-06 16:55:42,492 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 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 16:55:42,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:42,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 34 conjunts are in the unsatisfiable core [2021-01-06 16:55:42,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:42,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 693 proven. 1056 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 16:55:42,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:42,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-01-06 16:55:42,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99227009] [2021-01-06 16:55:42,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-01-06 16:55:42,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:42,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-01-06 16:55:42,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 16:55:42,679 INFO L87 Difference]: Start difference. First operand 93 states and 104 transitions. Second operand 36 states. [2021-01-06 16:55:42,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:42,838 INFO L93 Difference]: Finished difference Result 120 states and 142 transitions. [2021-01-06 16:55:42,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-06 16:55:42,838 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 92 [2021-01-06 16:55:42,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:42,839 INFO L225 Difference]: With dead ends: 120 [2021-01-06 16:55:42,840 INFO L226 Difference]: Without dead ends: 95 [2021-01-06 16:55:42,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 16:55:42,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-01-06 16:55:42,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-01-06 16:55:42,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2021-01-06 16:55:42,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 106 transitions. [2021-01-06 16:55:42,848 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 106 transitions. Word has length 92 [2021-01-06 16:55:42,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:42,848 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 106 transitions. [2021-01-06 16:55:42,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-01-06 16:55:42,848 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 106 transitions. [2021-01-06 16:55:42,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-01-06 16:55:42,848 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:42,849 INFO L422 BasicCegarLoop]: trace histogram [44, 33, 11, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:43,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-01-06 16:55:43,050 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:43,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:43,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1993007499, now seen corresponding path program 32 times [2021-01-06 16:55:43,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:43,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274861742] [2021-01-06 16:55:43,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:43,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:43,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 714 proven. 1122 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 16:55:43,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274861742] [2021-01-06 16:55:43,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479103354] [2021-01-06 16:55:43,726 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 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 16:55:43,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:55:43,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:43,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 35 conjunts are in the unsatisfiable core [2021-01-06 16:55:43,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:43,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 714 proven. 1122 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 16:55:43,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:43,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-01-06 16:55:43,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617569246] [2021-01-06 16:55:43,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-01-06 16:55:43,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:43,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-01-06 16:55:43,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 16:55:43,908 INFO L87 Difference]: Start difference. First operand 95 states and 106 transitions. Second operand 37 states. [2021-01-06 16:55:44,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:44,066 INFO L93 Difference]: Finished difference Result 122 states and 144 transitions. [2021-01-06 16:55:44,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-06 16:55:44,067 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 94 [2021-01-06 16:55:44,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:44,068 INFO L225 Difference]: With dead ends: 122 [2021-01-06 16:55:44,068 INFO L226 Difference]: Without dead ends: 97 [2021-01-06 16:55:44,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 16:55:44,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-01-06 16:55:44,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2021-01-06 16:55:44,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2021-01-06 16:55:44,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 108 transitions. [2021-01-06 16:55:44,076 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 108 transitions. Word has length 94 [2021-01-06 16:55:44,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:44,077 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 108 transitions. [2021-01-06 16:55:44,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2021-01-06 16:55:44,077 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 108 transitions. [2021-01-06 16:55:44,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-01-06 16:55:44,077 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:44,078 INFO L422 BasicCegarLoop]: trace histogram [45, 34, 11, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:44,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-01-06 16:55:44,291 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:44,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:44,297 INFO L82 PathProgramCache]: Analyzing trace with hash -2146245714, now seen corresponding path program 33 times [2021-01-06 16:55:44,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:44,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613310495] [2021-01-06 16:55:44,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:44,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:45,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 735 proven. 1190 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 16:55:45,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613310495] [2021-01-06 16:55:45,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195160742] [2021-01-06 16:55:45,013 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 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 16:55:45,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-01-06 16:55:45,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:45,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 16:55:45,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:45,503 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:55:45,505 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:55:45,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 835 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2021-01-06 16:55:45,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:45,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 16] total 51 [2021-01-06 16:55:45,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415482194] [2021-01-06 16:55:45,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-01-06 16:55:45,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:45,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-01-06 16:55:45,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=761, Invalid=1789, Unknown=0, NotChecked=0, Total=2550 [2021-01-06 16:55:45,557 INFO L87 Difference]: Start difference. First operand 97 states and 108 transitions. Second operand 51 states. [2021-01-06 16:55:46,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:46,688 INFO L93 Difference]: Finished difference Result 131 states and 156 transitions. [2021-01-06 16:55:46,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-01-06 16:55:46,689 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 96 [2021-01-06 16:55:46,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:46,689 INFO L225 Difference]: With dead ends: 131 [2021-01-06 16:55:46,690 INFO L226 Difference]: Without dead ends: 104 [2021-01-06 16:55:46,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2481, Invalid=5001, Unknown=0, NotChecked=0, Total=7482 [2021-01-06 16:55:46,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-01-06 16:55:46,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 101. [2021-01-06 16:55:46,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2021-01-06 16:55:46,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 113 transitions. [2021-01-06 16:55:46,700 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 113 transitions. Word has length 96 [2021-01-06 16:55:46,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:46,700 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 113 transitions. [2021-01-06 16:55:46,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2021-01-06 16:55:46,700 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 113 transitions. [2021-01-06 16:55:46,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-01-06 16:55:46,701 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:46,701 INFO L422 BasicCegarLoop]: trace histogram [47, 35, 12, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:46,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-01-06 16:55:46,916 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:46,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:46,917 INFO L82 PathProgramCache]: Analyzing trace with hash 225002294, now seen corresponding path program 34 times [2021-01-06 16:55:46,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:46,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201016076] [2021-01-06 16:55:46,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:46,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:47,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 828 proven. 1260 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-01-06 16:55:47,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201016076] [2021-01-06 16:55:47,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235994171] [2021-01-06 16:55:47,652 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 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 16:55:47,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:55:47,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:47,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 37 conjunts are in the unsatisfiable core [2021-01-06 16:55:47,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:47,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 828 proven. 1260 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-01-06 16:55:47,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:47,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-01-06 16:55:47,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548523357] [2021-01-06 16:55:47,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-01-06 16:55:47,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:47,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-01-06 16:55:47,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 16:55:47,845 INFO L87 Difference]: Start difference. First operand 101 states and 113 transitions. Second operand 39 states. [2021-01-06 16:55:47,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:47,980 INFO L93 Difference]: Finished difference Result 130 states and 154 transitions. [2021-01-06 16:55:47,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-06 16:55:47,980 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 100 [2021-01-06 16:55:47,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:47,982 INFO L225 Difference]: With dead ends: 130 [2021-01-06 16:55:47,982 INFO L226 Difference]: Without dead ends: 103 [2021-01-06 16:55:47,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 16:55:47,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-01-06 16:55:47,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-01-06 16:55:47,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2021-01-06 16:55:47,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 115 transitions. [2021-01-06 16:55:47,990 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 115 transitions. Word has length 100 [2021-01-06 16:55:47,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:47,991 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 115 transitions. [2021-01-06 16:55:47,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2021-01-06 16:55:47,991 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 115 transitions. [2021-01-06 16:55:47,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-01-06 16:55:47,992 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:47,992 INFO L422 BasicCegarLoop]: trace histogram [48, 36, 12, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:48,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-06 16:55:48,207 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:48,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:48,208 INFO L82 PathProgramCache]: Analyzing trace with hash 144826137, now seen corresponding path program 35 times [2021-01-06 16:55:48,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:48,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112063638] [2021-01-06 16:55:48,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:48,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:48,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 851 proven. 1332 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-01-06 16:55:48,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112063638] [2021-01-06 16:55:48,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776931633] [2021-01-06 16:55:48,997 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 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 16:55:49,100 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2021-01-06 16:55:49,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:49,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 38 conjunts are in the unsatisfiable core [2021-01-06 16:55:49,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:49,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 851 proven. 1332 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-01-06 16:55:49,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:49,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-01-06 16:55:49,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203260836] [2021-01-06 16:55:49,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-01-06 16:55:49,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:49,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-01-06 16:55:49,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 16:55:49,240 INFO L87 Difference]: Start difference. First operand 103 states and 115 transitions. Second operand 40 states. [2021-01-06 16:55:49,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:49,422 INFO L93 Difference]: Finished difference Result 132 states and 156 transitions. [2021-01-06 16:55:49,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-06 16:55:49,423 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 102 [2021-01-06 16:55:49,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:49,424 INFO L225 Difference]: With dead ends: 132 [2021-01-06 16:55:49,424 INFO L226 Difference]: Without dead ends: 105 [2021-01-06 16:55:49,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 16:55:49,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-01-06 16:55:49,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2021-01-06 16:55:49,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2021-01-06 16:55:49,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 117 transitions. [2021-01-06 16:55:49,431 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 117 transitions. Word has length 102 [2021-01-06 16:55:49,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:49,431 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 117 transitions. [2021-01-06 16:55:49,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2021-01-06 16:55:49,431 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 117 transitions. [2021-01-06 16:55:49,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-01-06 16:55:49,432 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:49,432 INFO L422 BasicCegarLoop]: trace histogram [49, 37, 12, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:49,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-06 16:55:49,648 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:49,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:49,649 INFO L82 PathProgramCache]: Analyzing trace with hash 404950588, now seen corresponding path program 36 times [2021-01-06 16:55:49,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:49,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511059797] [2021-01-06 16:55:49,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:49,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:50,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 874 proven. 1406 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-01-06 16:55:50,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511059797] [2021-01-06 16:55:50,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765965371] [2021-01-06 16:55:50,485 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 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 16:55:50,594 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2021-01-06 16:55:50,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:50,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 16:55:50,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:51,081 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:55:51,083 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:55:51,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 995 refuted. 0 times theorem prover too weak. 1406 trivial. 0 not checked. [2021-01-06 16:55:51,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:51,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 17] total 55 [2021-01-06 16:55:51,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022686285] [2021-01-06 16:55:51,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-01-06 16:55:51,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:51,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-01-06 16:55:51,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=889, Invalid=2081, Unknown=0, NotChecked=0, Total=2970 [2021-01-06 16:55:51,127 INFO L87 Difference]: Start difference. First operand 105 states and 117 transitions. Second operand 55 states. [2021-01-06 16:55:52,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:52,434 INFO L93 Difference]: Finished difference Result 141 states and 168 transitions. [2021-01-06 16:55:52,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-01-06 16:55:52,434 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 104 [2021-01-06 16:55:52,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:52,436 INFO L225 Difference]: With dead ends: 141 [2021-01-06 16:55:52,436 INFO L226 Difference]: Without dead ends: 112 [2021-01-06 16:55:52,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1321 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2908, Invalid=5834, Unknown=0, NotChecked=0, Total=8742 [2021-01-06 16:55:52,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-01-06 16:55:52,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2021-01-06 16:55:52,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2021-01-06 16:55:52,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 122 transitions. [2021-01-06 16:55:52,449 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 122 transitions. Word has length 104 [2021-01-06 16:55:52,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:52,450 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 122 transitions. [2021-01-06 16:55:52,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2021-01-06 16:55:52,450 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 122 transitions. [2021-01-06 16:55:52,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-01-06 16:55:52,450 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:52,451 INFO L422 BasicCegarLoop]: trace histogram [51, 38, 13, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:52,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-06 16:55:52,667 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:52,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:52,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1644974268, now seen corresponding path program 37 times [2021-01-06 16:55:52,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:52,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809769910] [2021-01-06 16:55:52,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:52,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:53,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 975 proven. 1482 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-01-06 16:55:53,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809769910] [2021-01-06 16:55:53,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285542590] [2021-01-06 16:55:53,571 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 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 16:55:53,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:53,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 40 conjunts are in the unsatisfiable core [2021-01-06 16:55:53,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:53,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 975 proven. 1482 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-01-06 16:55:53,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:53,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2021-01-06 16:55:53,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726048324] [2021-01-06 16:55:53,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-01-06 16:55:53,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:53,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-01-06 16:55:53,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 16:55:53,802 INFO L87 Difference]: Start difference. First operand 109 states and 122 transitions. Second operand 42 states. [2021-01-06 16:55:53,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:53,979 INFO L93 Difference]: Finished difference Result 140 states and 166 transitions. [2021-01-06 16:55:53,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-06 16:55:53,979 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 108 [2021-01-06 16:55:53,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:53,981 INFO L225 Difference]: With dead ends: 140 [2021-01-06 16:55:53,981 INFO L226 Difference]: Without dead ends: 111 [2021-01-06 16:55:53,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 16:55:53,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-01-06 16:55:53,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2021-01-06 16:55:53,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2021-01-06 16:55:53,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 124 transitions. [2021-01-06 16:55:53,989 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 124 transitions. Word has length 108 [2021-01-06 16:55:53,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:53,989 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 124 transitions. [2021-01-06 16:55:53,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2021-01-06 16:55:53,990 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 124 transitions. [2021-01-06 16:55:53,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-01-06 16:55:53,990 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:53,991 INFO L422 BasicCegarLoop]: trace histogram [52, 39, 13, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:54,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:54,205 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:54,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:54,206 INFO L82 PathProgramCache]: Analyzing trace with hash -921716697, now seen corresponding path program 38 times [2021-01-06 16:55:54,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:54,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458175144] [2021-01-06 16:55:54,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:54,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:55,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1000 proven. 1560 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-01-06 16:55:55,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458175144] [2021-01-06 16:55:55,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542509166] [2021-01-06 16:55:55,087 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 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 16:55:55,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:55:55,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:55,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 41 conjunts are in the unsatisfiable core [2021-01-06 16:55:55,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:55,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1000 proven. 1560 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-01-06 16:55:55,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:55,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2021-01-06 16:55:55,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748715040] [2021-01-06 16:55:55,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-01-06 16:55:55,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:55,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-01-06 16:55:55,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 16:55:55,303 INFO L87 Difference]: Start difference. First operand 111 states and 124 transitions. Second operand 43 states. [2021-01-06 16:55:55,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:55,525 INFO L93 Difference]: Finished difference Result 142 states and 168 transitions. [2021-01-06 16:55:55,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-06 16:55:55,525 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 110 [2021-01-06 16:55:55,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:55,527 INFO L225 Difference]: With dead ends: 142 [2021-01-06 16:55:55,527 INFO L226 Difference]: Without dead ends: 113 [2021-01-06 16:55:55,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 16:55:55,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-01-06 16:55:55,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2021-01-06 16:55:55,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2021-01-06 16:55:55,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 126 transitions. [2021-01-06 16:55:55,538 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 126 transitions. Word has length 110 [2021-01-06 16:55:55,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:55,538 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 126 transitions. [2021-01-06 16:55:55,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2021-01-06 16:55:55,538 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 126 transitions. [2021-01-06 16:55:55,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-01-06 16:55:55,539 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:55,539 INFO L422 BasicCegarLoop]: trace histogram [53, 40, 13, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:55,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:55,753 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:55,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:55,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1655892918, now seen corresponding path program 39 times [2021-01-06 16:55:55,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:55,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159209175] [2021-01-06 16:55:55,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:55,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:56,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1025 proven. 1640 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-01-06 16:55:56,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159209175] [2021-01-06 16:55:56,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650383899] [2021-01-06 16:55:56,732 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 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 16:55:56,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2021-01-06 16:55:56,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:56,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 16:55:56,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:57,361 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:55:57,366 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:55:57,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 1169 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2021-01-06 16:55:57,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:57,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 18] total 59 [2021-01-06 16:55:57,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463785572] [2021-01-06 16:55:57,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-01-06 16:55:57,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:57,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-01-06 16:55:57,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1027, Invalid=2395, Unknown=0, NotChecked=0, Total=3422 [2021-01-06 16:55:57,414 INFO L87 Difference]: Start difference. First operand 113 states and 126 transitions. Second operand 59 states. [2021-01-06 16:55:58,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:58,905 INFO L93 Difference]: Finished difference Result 151 states and 180 transitions. [2021-01-06 16:55:58,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-01-06 16:55:58,906 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 112 [2021-01-06 16:55:58,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:58,907 INFO L225 Difference]: With dead ends: 151 [2021-01-06 16:55:58,907 INFO L226 Difference]: Without dead ends: 120 [2021-01-06 16:55:58,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1528 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3369, Invalid=6731, Unknown=0, NotChecked=0, Total=10100 [2021-01-06 16:55:58,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-01-06 16:55:58,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2021-01-06 16:55:58,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2021-01-06 16:55:58,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 131 transitions. [2021-01-06 16:55:58,917 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 131 transitions. Word has length 112 [2021-01-06 16:55:58,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:58,918 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 131 transitions. [2021-01-06 16:55:58,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2021-01-06 16:55:58,918 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 131 transitions. [2021-01-06 16:55:58,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-01-06 16:55:58,919 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:58,919 INFO L422 BasicCegarLoop]: trace histogram [55, 41, 14, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:59,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:59,134 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:59,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:59,135 INFO L82 PathProgramCache]: Analyzing trace with hash 26351314, now seen corresponding path program 40 times [2021-01-06 16:55:59,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:59,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557931220] [2021-01-06 16:55:59,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:59,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:56:00,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1134 proven. 1722 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-01-06 16:56:00,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557931220] [2021-01-06 16:56:00,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121577131] [2021-01-06 16:56:00,215 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 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 16:56:00,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:56:00,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:56:00,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 43 conjunts are in the unsatisfiable core [2021-01-06 16:56:00,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:56:00,424 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1134 proven. 1722 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-01-06 16:56:00,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:56:00,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2021-01-06 16:56:00,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772523574] [2021-01-06 16:56:00,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-01-06 16:56:00,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:56:00,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-01-06 16:56:00,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 16:56:00,427 INFO L87 Difference]: Start difference. First operand 117 states and 131 transitions. Second operand 45 states. [2021-01-06 16:56:00,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:56:00,594 INFO L93 Difference]: Finished difference Result 150 states and 178 transitions. [2021-01-06 16:56:00,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-06 16:56:00,597 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 116 [2021-01-06 16:56:00,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:56:00,598 INFO L225 Difference]: With dead ends: 150 [2021-01-06 16:56:00,598 INFO L226 Difference]: Without dead ends: 119 [2021-01-06 16:56:00,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 16:56:00,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-01-06 16:56:00,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2021-01-06 16:56:00,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2021-01-06 16:56:00,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 133 transitions. [2021-01-06 16:56:00,606 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 133 transitions. Word has length 116 [2021-01-06 16:56:00,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:56:00,607 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 133 transitions. [2021-01-06 16:56:00,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2021-01-06 16:56:00,607 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 133 transitions. [2021-01-06 16:56:00,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-01-06 16:56:00,608 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:56:00,608 INFO L422 BasicCegarLoop]: trace histogram [56, 42, 14, 1, 1, 1, 1, 1, 1] [2021-01-06 16:56:00,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-01-06 16:56:00,824 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:56:00,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:56:00,825 INFO L82 PathProgramCache]: Analyzing trace with hash -321614667, now seen corresponding path program 41 times [2021-01-06 16:56:00,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:56:00,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052432464] [2021-01-06 16:56:00,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:56:00,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:56:01,951 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1161 proven. 1806 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-01-06 16:56:01,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052432464] [2021-01-06 16:56:01,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520613486] [2021-01-06 16:56:01,952 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 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 16:56:02,057 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 57 check-sat command(s) [2021-01-06 16:56:02,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:56:02,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 44 conjunts are in the unsatisfiable core [2021-01-06 16:56:02,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:56:02,206 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1161 proven. 1806 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-01-06 16:56:02,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:56:02,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2021-01-06 16:56:02,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223151405] [2021-01-06 16:56:02,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-01-06 16:56:02,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:56:02,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-01-06 16:56:02,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 16:56:02,210 INFO L87 Difference]: Start difference. First operand 119 states and 133 transitions. Second operand 46 states. [2021-01-06 16:56:02,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:56:02,405 INFO L93 Difference]: Finished difference Result 152 states and 180 transitions. [2021-01-06 16:56:02,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-01-06 16:56:02,406 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 118 [2021-01-06 16:56:02,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:56:02,408 INFO L225 Difference]: With dead ends: 152 [2021-01-06 16:56:02,408 INFO L226 Difference]: Without dead ends: 121 [2021-01-06 16:56:02,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 16:56:02,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-01-06 16:56:02,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2021-01-06 16:56:02,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2021-01-06 16:56:02,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 135 transitions. [2021-01-06 16:56:02,418 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 135 transitions. Word has length 118 [2021-01-06 16:56:02,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:56:02,418 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 135 transitions. [2021-01-06 16:56:02,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2021-01-06 16:56:02,419 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 135 transitions. [2021-01-06 16:56:02,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-01-06 16:56:02,420 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:56:02,420 INFO L422 BasicCegarLoop]: trace histogram [57, 43, 14, 1, 1, 1, 1, 1, 1] [2021-01-06 16:56:02,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:56:02,637 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:56:02,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:56:02,638 INFO L82 PathProgramCache]: Analyzing trace with hash 290526680, now seen corresponding path program 42 times [2021-01-06 16:56:02,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:56:02,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814245979] [2021-01-06 16:56:02,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:56:02,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:56:03,796 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 1188 proven. 1892 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-01-06 16:56:03,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814245979] [2021-01-06 16:56:03,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248176371] [2021-01-06 16:56:03,797 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 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 16:56:03,930 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2021-01-06 16:56:03,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:56:03,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 16:56:03,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:56:04,452 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:56:04,453 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:56:04,506 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 1357 refuted. 0 times theorem prover too weak. 1892 trivial. 0 not checked. [2021-01-06 16:56:04,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:56:04,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 19] total 63 [2021-01-06 16:56:04,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986997357] [2021-01-06 16:56:04,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-01-06 16:56:04,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:56:04,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-01-06 16:56:04,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1175, Invalid=2731, Unknown=0, NotChecked=0, Total=3906 [2021-01-06 16:56:04,508 INFO L87 Difference]: Start difference. First operand 121 states and 135 transitions. Second operand 63 states. [2021-01-06 16:56:06,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:56:06,117 INFO L93 Difference]: Finished difference Result 161 states and 192 transitions. [2021-01-06 16:56:06,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-01-06 16:56:06,118 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 120 [2021-01-06 16:56:06,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:56:06,119 INFO L225 Difference]: With dead ends: 161 [2021-01-06 16:56:06,120 INFO L226 Difference]: Without dead ends: 128 [2021-01-06 16:56:06,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1750 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3864, Invalid=7692, Unknown=0, NotChecked=0, Total=11556 [2021-01-06 16:56:06,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-01-06 16:56:06,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 125. [2021-01-06 16:56:06,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2021-01-06 16:56:06,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 140 transitions. [2021-01-06 16:56:06,129 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 140 transitions. Word has length 120 [2021-01-06 16:56:06,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:56:06,129 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 140 transitions. [2021-01-06 16:56:06,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2021-01-06 16:56:06,129 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 140 transitions. [2021-01-06 16:56:06,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-01-06 16:56:06,130 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:56:06,130 INFO L422 BasicCegarLoop]: trace histogram [59, 44, 15, 1, 1, 1, 1, 1, 1] [2021-01-06 16:56:06,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:56:06,345 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:56:06,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:56:06,345 INFO L82 PathProgramCache]: Analyzing trace with hash 394041824, now seen corresponding path program 43 times [2021-01-06 16:56:06,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:56:06,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073045128] [2021-01-06 16:56:06,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:56:06,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:56:07,423 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 1305 proven. 1980 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-01-06 16:56:07,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073045128] [2021-01-06 16:56:07,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622094286] [2021-01-06 16:56:07,424 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 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 16:56:07,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:56:07,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 46 conjunts are in the unsatisfiable core [2021-01-06 16:56:07,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:56:07,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 1305 proven. 1980 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-01-06 16:56:07,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:56:07,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2021-01-06 16:56:07,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288178743] [2021-01-06 16:56:07,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-01-06 16:56:07,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:56:07,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-01-06 16:56:07,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 16:56:07,608 INFO L87 Difference]: Start difference. First operand 125 states and 140 transitions. Second operand 48 states. [2021-01-06 16:56:07,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:56:07,782 INFO L93 Difference]: Finished difference Result 160 states and 190 transitions. [2021-01-06 16:56:07,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-06 16:56:07,783 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 124 [2021-01-06 16:56:07,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:56:07,784 INFO L225 Difference]: With dead ends: 160 [2021-01-06 16:56:07,784 INFO L226 Difference]: Without dead ends: 127 [2021-01-06 16:56:07,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 16:56:07,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-01-06 16:56:07,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-01-06 16:56:07,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2021-01-06 16:56:07,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 142 transitions. [2021-01-06 16:56:07,791 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 142 transitions. Word has length 124 [2021-01-06 16:56:07,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:56:07,792 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 142 transitions. [2021-01-06 16:56:07,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2021-01-06 16:56:07,792 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 142 transitions. [2021-01-06 16:56:07,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-01-06 16:56:07,792 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:56:07,793 INFO L422 BasicCegarLoop]: trace histogram [60, 45, 15, 1, 1, 1, 1, 1, 1] [2021-01-06 16:56:08,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-01-06 16:56:08,007 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:56:08,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:56:08,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1613266115, now seen corresponding path program 44 times [2021-01-06 16:56:08,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:56:08,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241463394] [2021-01-06 16:56:08,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:56:08,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:56:09,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 1334 proven. 2070 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-01-06 16:56:09,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241463394] [2021-01-06 16:56:09,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715610364] [2021-01-06 16:56:09,124 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 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 16:56:09,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:56:09,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:56:09,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 47 conjunts are in the unsatisfiable core [2021-01-06 16:56:09,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:56:09,317 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 1334 proven. 2070 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-01-06 16:56:09,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:56:09,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2021-01-06 16:56:09,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523492992] [2021-01-06 16:56:09,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-01-06 16:56:09,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:56:09,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-01-06 16:56:09,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 16:56:09,319 INFO L87 Difference]: Start difference. First operand 127 states and 142 transitions. Second operand 49 states. [2021-01-06 16:56:09,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:56:09,511 INFO L93 Difference]: Finished difference Result 162 states and 192 transitions. [2021-01-06 16:56:09,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-01-06 16:56:09,512 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 126 [2021-01-06 16:56:09,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:56:09,513 INFO L225 Difference]: With dead ends: 162 [2021-01-06 16:56:09,513 INFO L226 Difference]: Without dead ends: 129 [2021-01-06 16:56:09,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 16:56:09,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-01-06 16:56:09,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-01-06 16:56:09,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2021-01-06 16:56:09,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 144 transitions. [2021-01-06 16:56:09,520 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 144 transitions. Word has length 126 [2021-01-06 16:56:09,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:56:09,520 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 144 transitions. [2021-01-06 16:56:09,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2021-01-06 16:56:09,521 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 144 transitions. [2021-01-06 16:56:09,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-01-06 16:56:09,521 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:56:09,522 INFO L422 BasicCegarLoop]: trace histogram [61, 46, 15, 1, 1, 1, 1, 1, 1] [2021-01-06 16:56:09,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-01-06 16:56:09,737 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:56:09,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:56:09,737 INFO L82 PathProgramCache]: Analyzing trace with hash 761737958, now seen corresponding path program 45 times [2021-01-06 16:56:09,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:56:09,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127338901] [2021-01-06 16:56:09,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:56:09,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:56:10,839 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 1363 proven. 2162 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-01-06 16:56:10,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127338901] [2021-01-06 16:56:10,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094232183] [2021-01-06 16:56:10,840 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 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 16:56:10,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2021-01-06 16:56:10,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:56:10,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 16:56:10,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:56:11,580 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:56:11,581 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:56:11,636 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 1559 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2021-01-06 16:56:11,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:56:11,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 20] total 67 [2021-01-06 16:56:11,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383215289] [2021-01-06 16:56:11,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2021-01-06 16:56:11,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:56:11,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-01-06 16:56:11,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1333, Invalid=3089, Unknown=0, NotChecked=0, Total=4422 [2021-01-06 16:56:11,639 INFO L87 Difference]: Start difference. First operand 129 states and 144 transitions. Second operand 67 states. [2021-01-06 16:56:13,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:56:13,338 INFO L93 Difference]: Finished difference Result 171 states and 204 transitions. [2021-01-06 16:56:13,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-01-06 16:56:13,340 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 128 [2021-01-06 16:56:13,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:56:13,341 INFO L225 Difference]: With dead ends: 171 [2021-01-06 16:56:13,341 INFO L226 Difference]: Without dead ends: 136 [2021-01-06 16:56:13,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1987 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4393, Invalid=8717, Unknown=0, NotChecked=0, Total=13110 [2021-01-06 16:56:13,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-01-06 16:56:13,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 133. [2021-01-06 16:56:13,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2021-01-06 16:56:13,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 149 transitions. [2021-01-06 16:56:13,360 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 149 transitions. Word has length 128 [2021-01-06 16:56:13,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:56:13,360 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 149 transitions. [2021-01-06 16:56:13,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2021-01-06 16:56:13,360 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 149 transitions. [2021-01-06 16:56:13,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-01-06 16:56:13,361 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:56:13,361 INFO L422 BasicCegarLoop]: trace histogram [63, 47, 16, 1, 1, 1, 1, 1, 1] [2021-01-06 16:56:13,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-01-06 16:56:13,575 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:56:13,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:56:13,576 INFO L82 PathProgramCache]: Analyzing trace with hash 2019776622, now seen corresponding path program 46 times [2021-01-06 16:56:13,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:56:13,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442641354] [2021-01-06 16:56:13,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:56:13,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:56:14,792 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 1488 proven. 2256 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-01-06 16:56:14,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442641354] [2021-01-06 16:56:14,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396797970] [2021-01-06 16:56:14,793 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 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 16:56:14,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:56:14,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:56:14,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 49 conjunts are in the unsatisfiable core [2021-01-06 16:56:14,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:56:14,986 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 1488 proven. 2256 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-01-06 16:56:14,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:56:14,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2021-01-06 16:56:14,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159564140] [2021-01-06 16:56:14,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-01-06 16:56:14,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:56:14,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-01-06 16:56:14,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-01-06 16:56:14,988 INFO L87 Difference]: Start difference. First operand 133 states and 149 transitions. Second operand 51 states. [2021-01-06 16:56:15,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:56:15,208 INFO L93 Difference]: Finished difference Result 170 states and 202 transitions. [2021-01-06 16:56:15,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-01-06 16:56:15,208 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 132 [2021-01-06 16:56:15,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:56:15,210 INFO L225 Difference]: With dead ends: 170 [2021-01-06 16:56:15,210 INFO L226 Difference]: Without dead ends: 135 [2021-01-06 16:56:15,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-01-06 16:56:15,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-01-06 16:56:15,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2021-01-06 16:56:15,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2021-01-06 16:56:15,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 151 transitions. [2021-01-06 16:56:15,218 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 151 transitions. Word has length 132 [2021-01-06 16:56:15,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:56:15,219 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 151 transitions. [2021-01-06 16:56:15,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2021-01-06 16:56:15,219 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 151 transitions. [2021-01-06 16:56:15,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-01-06 16:56:15,220 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:56:15,220 INFO L422 BasicCegarLoop]: trace histogram [64, 48, 16, 1, 1, 1, 1, 1, 1] [2021-01-06 16:56:15,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:56:15,436 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:56:15,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:56:15,437 INFO L82 PathProgramCache]: Analyzing trace with hash -927225775, now seen corresponding path program 47 times [2021-01-06 16:56:15,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:56:15,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576821610] [2021-01-06 16:56:15,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:56:15,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:56:16,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 1519 proven. 2352 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-01-06 16:56:16,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576821610] [2021-01-06 16:56:16,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729503150] [2021-01-06 16:56:16,843 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 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 16:56:16,951 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 65 check-sat command(s) [2021-01-06 16:56:16,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:56:16,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 50 conjunts are in the unsatisfiable core [2021-01-06 16:56:16,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:56:17,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 1519 proven. 2352 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-01-06 16:56:17,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:56:17,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2021-01-06 16:56:17,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042148549] [2021-01-06 16:56:17,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-01-06 16:56:17,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:56:17,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-01-06 16:56:17,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-01-06 16:56:17,075 INFO L87 Difference]: Start difference. First operand 135 states and 151 transitions. Second operand 52 states. [2021-01-06 16:56:17,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:56:17,295 INFO L93 Difference]: Finished difference Result 172 states and 204 transitions. [2021-01-06 16:56:17,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-01-06 16:56:17,296 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 134 [2021-01-06 16:56:17,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:56:17,297 INFO L225 Difference]: With dead ends: 172 [2021-01-06 16:56:17,297 INFO L226 Difference]: Without dead ends: 137 [2021-01-06 16:56:17,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-01-06 16:56:17,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-01-06 16:56:17,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-01-06 16:56:17,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2021-01-06 16:56:17,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 153 transitions. [2021-01-06 16:56:17,310 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 153 transitions. Word has length 134 [2021-01-06 16:56:17,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:56:17,311 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 153 transitions. [2021-01-06 16:56:17,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2021-01-06 16:56:17,311 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 153 transitions. [2021-01-06 16:56:17,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-01-06 16:56:17,312 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:56:17,313 INFO L422 BasicCegarLoop]: trace histogram [65, 49, 16, 1, 1, 1, 1, 1, 1] [2021-01-06 16:56:17,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:56:17,527 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:56:17,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:56:17,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1681886068, now seen corresponding path program 48 times [2021-01-06 16:56:17,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:56:17,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915118639] [2021-01-06 16:56:17,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:56:17,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:56:18,831 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 1550 proven. 2450 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-01-06 16:56:18,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915118639] [2021-01-06 16:56:18,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978167494] [2021-01-06 16:56:18,832 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 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 16:56:18,964 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 63 check-sat command(s) [2021-01-06 16:56:18,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:56:18,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 16:56:18,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:56:19,694 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:56:19,695 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:56:19,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 1775 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2021-01-06 16:56:19,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:56:19,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 21] total 71 [2021-01-06 16:56:19,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10056499] [2021-01-06 16:56:19,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-01-06 16:56:19,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:56:19,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-01-06 16:56:19,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1501, Invalid=3469, Unknown=0, NotChecked=0, Total=4970 [2021-01-06 16:56:19,757 INFO L87 Difference]: Start difference. First operand 137 states and 153 transitions. Second operand 71 states. [2021-01-06 16:56:21,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:56:21,764 INFO L93 Difference]: Finished difference Result 181 states and 216 transitions. [2021-01-06 16:56:21,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-01-06 16:56:21,764 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 136 [2021-01-06 16:56:21,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:56:21,766 INFO L225 Difference]: With dead ends: 181 [2021-01-06 16:56:21,766 INFO L226 Difference]: Without dead ends: 144 [2021-01-06 16:56:21,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2239 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4956, Invalid=9806, Unknown=0, NotChecked=0, Total=14762 [2021-01-06 16:56:21,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-01-06 16:56:21,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 141. [2021-01-06 16:56:21,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2021-01-06 16:56:21,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 158 transitions. [2021-01-06 16:56:21,776 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 158 transitions. Word has length 136 [2021-01-06 16:56:21,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:56:21,777 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 158 transitions. [2021-01-06 16:56:21,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2021-01-06 16:56:21,777 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 158 transitions. [2021-01-06 16:56:21,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-01-06 16:56:21,778 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:56:21,778 INFO L422 BasicCegarLoop]: trace histogram [67, 50, 17, 1, 1, 1, 1, 1, 1] [2021-01-06 16:56:21,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:56:21,992 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:56:21,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:56:21,992 INFO L82 PathProgramCache]: Analyzing trace with hash -126979460, now seen corresponding path program 49 times [2021-01-06 16:56:21,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:56:21,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662036134] [2021-01-06 16:56:21,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:56:22,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:56:23,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 1683 proven. 2550 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-01-06 16:56:23,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662036134] [2021-01-06 16:56:23,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069692433] [2021-01-06 16:56:23,394 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 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 16:56:23,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:56:23,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 52 conjunts are in the unsatisfiable core [2021-01-06 16:56:23,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:56:23,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 1683 proven. 2550 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-01-06 16:56:23,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:56:23,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2021-01-06 16:56:23,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951583841] [2021-01-06 16:56:23,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-01-06 16:56:23,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:56:23,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-01-06 16:56:23,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2021-01-06 16:56:23,619 INFO L87 Difference]: Start difference. First operand 141 states and 158 transitions. Second operand 54 states. [2021-01-06 16:56:23,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:56:23,775 INFO L93 Difference]: Finished difference Result 180 states and 214 transitions. [2021-01-06 16:56:23,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-01-06 16:56:23,776 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 140 [2021-01-06 16:56:23,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:56:23,777 INFO L225 Difference]: With dead ends: 180 [2021-01-06 16:56:23,777 INFO L226 Difference]: Without dead ends: 143 [2021-01-06 16:56:23,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2021-01-06 16:56:23,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-01-06 16:56:23,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2021-01-06 16:56:23,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2021-01-06 16:56:23,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 160 transitions. [2021-01-06 16:56:23,785 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 160 transitions. Word has length 140 [2021-01-06 16:56:23,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:56:23,786 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 160 transitions. [2021-01-06 16:56:23,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2021-01-06 16:56:23,786 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 160 transitions. [2021-01-06 16:56:23,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-01-06 16:56:23,787 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:56:23,787 INFO L422 BasicCegarLoop]: trace histogram [68, 51, 17, 1, 1, 1, 1, 1, 1] [2021-01-06 16:56:24,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:56:24,002 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:56:24,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:56:24,002 INFO L82 PathProgramCache]: Analyzing trace with hash 129380191, now seen corresponding path program 50 times [2021-01-06 16:56:24,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:56:24,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132621644] [2021-01-06 16:56:24,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:56:24,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:56:25,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 1716 proven. 2652 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-01-06 16:56:25,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132621644] [2021-01-06 16:56:25,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951537169] [2021-01-06 16:56:25,438 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 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 16:56:25,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:56:25,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:56:25,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 53 conjunts are in the unsatisfiable core [2021-01-06 16:56:25,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:56:25,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 1716 proven. 2652 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-01-06 16:56:25,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:56:25,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2021-01-06 16:56:25,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915895689] [2021-01-06 16:56:25,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-01-06 16:56:25,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:56:25,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-01-06 16:56:25,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2021-01-06 16:56:25,662 INFO L87 Difference]: Start difference. First operand 143 states and 160 transitions. Second operand 55 states. [2021-01-06 16:56:25,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:56:25,901 INFO L93 Difference]: Finished difference Result 182 states and 216 transitions. [2021-01-06 16:56:25,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-01-06 16:56:25,901 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 142 [2021-01-06 16:56:25,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:56:25,902 INFO L225 Difference]: With dead ends: 182 [2021-01-06 16:56:25,903 INFO L226 Difference]: Without dead ends: 145 [2021-01-06 16:56:25,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2021-01-06 16:56:25,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-01-06 16:56:25,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-01-06 16:56:25,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2021-01-06 16:56:25,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 162 transitions. [2021-01-06 16:56:25,911 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 162 transitions. Word has length 142 [2021-01-06 16:56:25,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:56:25,911 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 162 transitions. [2021-01-06 16:56:25,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2021-01-06 16:56:25,912 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 162 transitions. [2021-01-06 16:56:25,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-01-06 16:56:25,912 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:56:25,913 INFO L422 BasicCegarLoop]: trace histogram [69, 52, 17, 1, 1, 1, 1, 1, 1] [2021-01-06 16:56:26,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-01-06 16:56:26,125 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:56:26,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:56:26,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1677868930, now seen corresponding path program 51 times [2021-01-06 16:56:26,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:56:26,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693480528] [2021-01-06 16:56:26,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:56:26,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:56:27,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 1749 proven. 2756 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-01-06 16:56:27,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693480528] [2021-01-06 16:56:27,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640265160] [2021-01-06 16:56:27,606 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 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 16:56:27,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2021-01-06 16:56:27,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:56:27,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 16:56:27,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:56:28,522 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:56:28,524 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:56:28,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 0 proven. 2005 refuted. 0 times theorem prover too weak. 2756 trivial. 0 not checked. [2021-01-06 16:56:28,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:56:28,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 22] total 75 [2021-01-06 16:56:28,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181616798] [2021-01-06 16:56:28,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2021-01-06 16:56:28,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:56:28,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-01-06 16:56:28,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1679, Invalid=3871, Unknown=0, NotChecked=0, Total=5550 [2021-01-06 16:56:28,584 INFO L87 Difference]: Start difference. First operand 145 states and 162 transitions. Second operand 75 states. [2021-01-06 16:56:30,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:56:30,740 INFO L93 Difference]: Finished difference Result 191 states and 228 transitions. [2021-01-06 16:56:30,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-01-06 16:56:30,741 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 144 [2021-01-06 16:56:30,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:56:30,745 INFO L225 Difference]: With dead ends: 191 [2021-01-06 16:56:30,745 INFO L226 Difference]: Without dead ends: 152 [2021-01-06 16:56:30,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2506 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5553, Invalid=10959, Unknown=0, NotChecked=0, Total=16512 [2021-01-06 16:56:30,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-01-06 16:56:30,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 149. [2021-01-06 16:56:30,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2021-01-06 16:56:30,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 167 transitions. [2021-01-06 16:56:30,754 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 167 transitions. Word has length 144 [2021-01-06 16:56:30,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:56:30,754 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 167 transitions. [2021-01-06 16:56:30,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2021-01-06 16:56:30,754 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 167 transitions. [2021-01-06 16:56:30,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-01-06 16:56:30,755 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:56:30,755 INFO L422 BasicCegarLoop]: trace histogram [71, 53, 18, 1, 1, 1, 1, 1, 1] [2021-01-06 16:56:30,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:56:30,970 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:56:30,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:56:30,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1455552502, now seen corresponding path program 52 times [2021-01-06 16:56:30,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:56:30,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016043753] [2021-01-06 16:56:30,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:56:30,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:56:32,548 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 1890 proven. 2862 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-01-06 16:56:32,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016043753] [2021-01-06 16:56:32,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768602248] [2021-01-06 16:56:32,549 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 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 16:56:32,613 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:56:32,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:56:32,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 55 conjunts are in the unsatisfiable core [2021-01-06 16:56:32,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:56:32,757 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 1890 proven. 2862 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-01-06 16:56:32,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:56:32,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 57 [2021-01-06 16:56:32,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797101141] [2021-01-06 16:56:32,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-01-06 16:56:32,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:56:32,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-01-06 16:56:32,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2021-01-06 16:56:32,760 INFO L87 Difference]: Start difference. First operand 149 states and 167 transitions. Second operand 57 states. [2021-01-06 16:56:33,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:56:33,028 INFO L93 Difference]: Finished difference Result 190 states and 226 transitions. [2021-01-06 16:56:33,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-01-06 16:56:33,029 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 148 [2021-01-06 16:56:33,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:56:33,031 INFO L225 Difference]: With dead ends: 190 [2021-01-06 16:56:33,031 INFO L226 Difference]: Without dead ends: 151 [2021-01-06 16:56:33,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2021-01-06 16:56:33,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-01-06 16:56:33,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2021-01-06 16:56:33,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2021-01-06 16:56:33,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 169 transitions. [2021-01-06 16:56:33,040 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 169 transitions. Word has length 148 [2021-01-06 16:56:33,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:56:33,040 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 169 transitions. [2021-01-06 16:56:33,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2021-01-06 16:56:33,041 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 169 transitions. [2021-01-06 16:56:33,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-01-06 16:56:33,041 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:56:33,042 INFO L422 BasicCegarLoop]: trace histogram [72, 54, 18, 1, 1, 1, 1, 1, 1] [2021-01-06 16:56:33,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-01-06 16:56:33,242 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:56:33,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:56:33,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1001927149, now seen corresponding path program 53 times [2021-01-06 16:56:33,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:56:33,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605617166] [2021-01-06 16:56:33,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:56:33,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:56:34,884 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 1925 proven. 2970 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-01-06 16:56:34,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605617166] [2021-01-06 16:56:34,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207132792] [2021-01-06 16:56:34,885 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 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 16:56:34,997 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 73 check-sat command(s) [2021-01-06 16:56:34,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:56:34,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 56 conjunts are in the unsatisfiable core [2021-01-06 16:56:35,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:56:35,148 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 1925 proven. 2970 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-01-06 16:56:35,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:56:35,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 58 [2021-01-06 16:56:35,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149303707] [2021-01-06 16:56:35,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-01-06 16:56:35,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:56:35,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-01-06 16:56:35,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2021-01-06 16:56:35,150 INFO L87 Difference]: Start difference. First operand 151 states and 169 transitions. Second operand 58 states. [2021-01-06 16:56:35,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:56:35,398 INFO L93 Difference]: Finished difference Result 192 states and 228 transitions. [2021-01-06 16:56:35,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-01-06 16:56:35,399 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 150 [2021-01-06 16:56:35,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:56:35,400 INFO L225 Difference]: With dead ends: 192 [2021-01-06 16:56:35,400 INFO L226 Difference]: Without dead ends: 153 [2021-01-06 16:56:35,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2021-01-06 16:56:35,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-01-06 16:56:35,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2021-01-06 16:56:35,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2021-01-06 16:56:35,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 171 transitions. [2021-01-06 16:56:35,406 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 171 transitions. Word has length 150 [2021-01-06 16:56:35,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:56:35,406 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 171 transitions. [2021-01-06 16:56:35,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2021-01-06 16:56:35,407 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 171 transitions. [2021-01-06 16:56:35,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-01-06 16:56:35,408 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:56:35,408 INFO L422 BasicCegarLoop]: trace histogram [73, 55, 18, 1, 1, 1, 1, 1, 1] [2021-01-06 16:56:35,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-01-06 16:56:35,622 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:56:35,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:56:35,622 INFO L82 PathProgramCache]: Analyzing trace with hash 407858960, now seen corresponding path program 54 times [2021-01-06 16:56:35,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:56:35,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567455874] [2021-01-06 16:56:35,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:56:35,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:56:37,306 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 1960 proven. 3080 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-01-06 16:56:37,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567455874] [2021-01-06 16:56:37,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265964314] [2021-01-06 16:56:37,307 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 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 16:56:37,456 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 71 check-sat command(s) [2021-01-06 16:56:37,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:56:37,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 16:56:37,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:56:38,370 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:56:38,372 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:56:38,442 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 0 proven. 2249 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2021-01-06 16:56:38,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:56:38,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 23] total 79 [2021-01-06 16:56:38,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601100196] [2021-01-06 16:56:38,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 79 states [2021-01-06 16:56:38,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:56:38,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-01-06 16:56:38,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1867, Invalid=4295, Unknown=0, NotChecked=0, Total=6162 [2021-01-06 16:56:38,444 INFO L87 Difference]: Start difference. First operand 153 states and 171 transitions. Second operand 79 states. [2021-01-06 16:56:40,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:56:40,912 INFO L93 Difference]: Finished difference Result 201 states and 240 transitions. [2021-01-06 16:56:40,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-01-06 16:56:40,912 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 152 [2021-01-06 16:56:40,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:56:40,913 INFO L225 Difference]: With dead ends: 201 [2021-01-06 16:56:40,913 INFO L226 Difference]: Without dead ends: 160 [2021-01-06 16:56:40,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2788 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=6184, Invalid=12176, Unknown=0, NotChecked=0, Total=18360 [2021-01-06 16:56:40,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-01-06 16:56:40,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 157. [2021-01-06 16:56:40,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2021-01-06 16:56:40,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 176 transitions. [2021-01-06 16:56:40,923 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 176 transitions. Word has length 152 [2021-01-06 16:56:40,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:56:40,924 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 176 transitions. [2021-01-06 16:56:40,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 79 states. [2021-01-06 16:56:40,924 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 176 transitions. [2021-01-06 16:56:40,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-01-06 16:56:40,925 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:56:40,925 INFO L422 BasicCegarLoop]: trace histogram [75, 56, 19, 1, 1, 1, 1, 1, 1] [2021-01-06 16:56:41,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:56:41,140 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:56:41,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:56:41,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1542076696, now seen corresponding path program 55 times [2021-01-06 16:56:41,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:56:41,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122942526] [2021-01-06 16:56:41,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:56:41,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:56:42,930 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 2109 proven. 3192 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-01-06 16:56:42,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122942526] [2021-01-06 16:56:42,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055976363] [2021-01-06 16:56:42,931 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 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 16:56:43,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:56:43,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 58 conjunts are in the unsatisfiable core [2021-01-06 16:56:43,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:56:43,136 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 2109 proven. 3192 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-01-06 16:56:43,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:56:43,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2021-01-06 16:56:43,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627591804] [2021-01-06 16:56:43,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-01-06 16:56:43,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:56:43,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-01-06 16:56:43,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2021-01-06 16:56:43,138 INFO L87 Difference]: Start difference. First operand 157 states and 176 transitions. Second operand 60 states. [2021-01-06 16:56:43,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:56:43,425 INFO L93 Difference]: Finished difference Result 200 states and 238 transitions. [2021-01-06 16:56:43,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-01-06 16:56:43,426 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 156 [2021-01-06 16:56:43,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:56:43,428 INFO L225 Difference]: With dead ends: 200 [2021-01-06 16:56:43,428 INFO L226 Difference]: Without dead ends: 159 [2021-01-06 16:56:43,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2021-01-06 16:56:43,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-01-06 16:56:43,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2021-01-06 16:56:43,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2021-01-06 16:56:43,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 178 transitions. [2021-01-06 16:56:43,437 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 178 transitions. Word has length 156 [2021-01-06 16:56:43,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:56:43,438 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 178 transitions. [2021-01-06 16:56:43,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2021-01-06 16:56:43,438 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 178 transitions. [2021-01-06 16:56:43,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-01-06 16:56:43,439 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:56:43,439 INFO L422 BasicCegarLoop]: trace histogram [76, 57, 19, 1, 1, 1, 1, 1, 1] [2021-01-06 16:56:43,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-01-06 16:56:43,653 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:56:43,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:56:43,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1121570811, now seen corresponding path program 56 times [2021-01-06 16:56:43,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:56:43,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443943859] [2021-01-06 16:56:43,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:56:43,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:56:45,490 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 2146 proven. 3306 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-01-06 16:56:45,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443943859] [2021-01-06 16:56:45,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051207018] [2021-01-06 16:56:45,491 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 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 16:56:45,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:56:45,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:56:45,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 59 conjunts are in the unsatisfiable core [2021-01-06 16:56:45,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:56:45,716 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 2146 proven. 3306 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-01-06 16:56:45,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:56:45,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 61 [2021-01-06 16:56:45,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7095789] [2021-01-06 16:56:45,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-01-06 16:56:45,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:56:45,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-01-06 16:56:45,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2021-01-06 16:56:45,719 INFO L87 Difference]: Start difference. First operand 159 states and 178 transitions. Second operand 61 states. [2021-01-06 16:56:45,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:56:45,914 INFO L93 Difference]: Finished difference Result 202 states and 240 transitions. [2021-01-06 16:56:45,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-01-06 16:56:45,914 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 158 [2021-01-06 16:56:45,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:56:45,916 INFO L225 Difference]: With dead ends: 202 [2021-01-06 16:56:45,916 INFO L226 Difference]: Without dead ends: 161 [2021-01-06 16:56:45,916 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2021-01-06 16:56:45,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-01-06 16:56:45,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2021-01-06 16:56:45,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2021-01-06 16:56:45,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 180 transitions. [2021-01-06 16:56:45,926 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 180 transitions. Word has length 158 [2021-01-06 16:56:45,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:56:45,926 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 180 transitions. [2021-01-06 16:56:45,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2021-01-06 16:56:45,927 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 180 transitions. [2021-01-06 16:56:45,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-01-06 16:56:45,927 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:56:45,928 INFO L422 BasicCegarLoop]: trace histogram [77, 58, 19, 1, 1, 1, 1, 1, 1] [2021-01-06 16:56:46,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:56:46,141 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:56:46,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:56:46,142 INFO L82 PathProgramCache]: Analyzing trace with hash 742341150, now seen corresponding path program 57 times [2021-01-06 16:56:46,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:56:46,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831726108] [2021-01-06 16:56:46,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:56:46,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:56:47,984 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 2183 proven. 3422 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-01-06 16:56:47,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831726108] [2021-01-06 16:56:47,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065234329] [2021-01-06 16:56:47,985 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 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 16:56:48,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 38 check-sat command(s) [2021-01-06 16:56:48,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:56:48,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 29 conjunts are in the unsatisfiable core [2021-01-06 16:56:48,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:56:49,086 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:56:49,089 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:56:49,168 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 2507 refuted. 0 times theorem prover too weak. 3422 trivial. 0 not checked. [2021-01-06 16:56:49,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:56:49,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 24] total 83 [2021-01-06 16:56:49,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816453257] [2021-01-06 16:56:49,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 83 states [2021-01-06 16:56:49,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:56:49,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-01-06 16:56:49,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2065, Invalid=4741, Unknown=0, NotChecked=0, Total=6806 [2021-01-06 16:56:49,170 INFO L87 Difference]: Start difference. First operand 161 states and 180 transitions. Second operand 83 states. [2021-01-06 16:56:51,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:56:51,922 INFO L93 Difference]: Finished difference Result 211 states and 252 transitions. [2021-01-06 16:56:51,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-01-06 16:56:51,923 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 160 [2021-01-06 16:56:51,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:56:51,924 INFO L225 Difference]: With dead ends: 211 [2021-01-06 16:56:51,924 INFO L226 Difference]: Without dead ends: 168 [2021-01-06 16:56:51,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3085 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=6849, Invalid=13457, Unknown=0, NotChecked=0, Total=20306 [2021-01-06 16:56:51,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-01-06 16:56:51,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 165. [2021-01-06 16:56:51,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2021-01-06 16:56:51,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 185 transitions. [2021-01-06 16:56:51,933 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 185 transitions. Word has length 160 [2021-01-06 16:56:51,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:56:51,934 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 185 transitions. [2021-01-06 16:56:51,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 83 states. [2021-01-06 16:56:51,934 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 185 transitions. [2021-01-06 16:56:51,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-01-06 16:56:51,935 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:56:51,935 INFO L422 BasicCegarLoop]: trace histogram [79, 59, 20, 1, 1, 1, 1, 1, 1] [2021-01-06 16:56:52,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-01-06 16:56:52,137 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:56:52,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:56:52,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1560074842, now seen corresponding path program 58 times [2021-01-06 16:56:52,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:56:52,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869108820] [2021-01-06 16:56:52,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:56:52,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:56:54,132 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 2340 proven. 3540 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2021-01-06 16:56:54,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869108820] [2021-01-06 16:56:54,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381080769] [2021-01-06 16:56:54,132 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 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 16:56:54,207 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:56:54,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:56:54,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 61 conjunts are in the unsatisfiable core [2021-01-06 16:56:54,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:56:54,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 2340 proven. 3540 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2021-01-06 16:56:54,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:56:54,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 63 [2021-01-06 16:56:54,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390469026] [2021-01-06 16:56:54,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-01-06 16:56:54,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:56:54,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-01-06 16:56:54,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2021-01-06 16:56:54,375 INFO L87 Difference]: Start difference. First operand 165 states and 185 transitions. Second operand 63 states. [2021-01-06 16:56:54,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:56:54,583 INFO L93 Difference]: Finished difference Result 210 states and 250 transitions. [2021-01-06 16:56:54,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-01-06 16:56:54,584 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 164 [2021-01-06 16:56:54,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:56:54,585 INFO L225 Difference]: With dead ends: 210 [2021-01-06 16:56:54,585 INFO L226 Difference]: Without dead ends: 167 [2021-01-06 16:56:54,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2021-01-06 16:56:54,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-01-06 16:56:54,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2021-01-06 16:56:54,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2021-01-06 16:56:54,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 187 transitions. [2021-01-06 16:56:54,594 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 187 transitions. Word has length 164 [2021-01-06 16:56:54,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:56:54,594 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 187 transitions. [2021-01-06 16:56:54,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2021-01-06 16:56:54,595 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 187 transitions. [2021-01-06 16:56:54,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-01-06 16:56:54,595 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:56:54,595 INFO L422 BasicCegarLoop]: trace histogram [80, 60, 20, 1, 1, 1, 1, 1, 1] [2021-01-06 16:56:54,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:56:54,796 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:56:54,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:56:54,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1129633399, now seen corresponding path program 59 times [2021-01-06 16:56:54,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:56:54,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821570904] [2021-01-06 16:56:54,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:56:54,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:56:56,864 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 2379 proven. 3660 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2021-01-06 16:56:56,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821570904] [2021-01-06 16:56:56,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173677357] [2021-01-06 16:56:56,865 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 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 16:56:56,988 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 81 check-sat command(s) [2021-01-06 16:56:56,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:56:56,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 62 conjunts are in the unsatisfiable core [2021-01-06 16:56:56,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:56:57,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 2379 proven. 3660 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2021-01-06 16:56:57,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:56:57,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 64 [2021-01-06 16:56:57,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939845004] [2021-01-06 16:56:57,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2021-01-06 16:56:57,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:56:57,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-01-06 16:56:57,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2021-01-06 16:56:57,166 INFO L87 Difference]: Start difference. First operand 167 states and 187 transitions. Second operand 64 states. [2021-01-06 16:56:57,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:56:57,486 INFO L93 Difference]: Finished difference Result 212 states and 252 transitions. [2021-01-06 16:56:57,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-01-06 16:56:57,486 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 166 [2021-01-06 16:56:57,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:56:57,487 INFO L225 Difference]: With dead ends: 212 [2021-01-06 16:56:57,488 INFO L226 Difference]: Without dead ends: 169 [2021-01-06 16:56:57,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2021-01-06 16:56:57,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-01-06 16:56:57,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2021-01-06 16:56:57,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2021-01-06 16:56:57,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 189 transitions. [2021-01-06 16:56:57,497 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 189 transitions. Word has length 166 [2021-01-06 16:56:57,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:56:57,497 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 189 transitions. [2021-01-06 16:56:57,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2021-01-06 16:56:57,497 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 189 transitions. [2021-01-06 16:56:57,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-01-06 16:56:57,498 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:56:57,498 INFO L422 BasicCegarLoop]: trace histogram [81, 61, 20, 1, 1, 1, 1, 1, 1] [2021-01-06 16:56:57,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-01-06 16:56:57,711 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:56:57,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:56:57,712 INFO L82 PathProgramCache]: Analyzing trace with hash 207732908, now seen corresponding path program 60 times [2021-01-06 16:56:57,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:56:57,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184388667] [2021-01-06 16:56:57,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:56:57,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:56:59,850 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 2418 proven. 3782 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2021-01-06 16:56:59,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184388667] [2021-01-06 16:56:59,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055822078] [2021-01-06 16:56:59,851 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 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 16:57:00,027 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2021-01-06 16:57:00,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:57:00,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 30 conjunts are in the unsatisfiable core [2021-01-06 16:57:00,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:57:01,143 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:57:01,144 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:57:01,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 0 proven. 2779 refuted. 0 times theorem prover too weak. 3782 trivial. 0 not checked. [2021-01-06 16:57:01,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:57:01,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 25] total 87 [2021-01-06 16:57:01,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114852714] [2021-01-06 16:57:01,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 87 states [2021-01-06 16:57:01,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:57:01,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-01-06 16:57:01,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2273, Invalid=5209, Unknown=0, NotChecked=0, Total=7482 [2021-01-06 16:57:01,232 INFO L87 Difference]: Start difference. First operand 169 states and 189 transitions. Second operand 87 states. [2021-01-06 16:57:04,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:57:04,271 INFO L93 Difference]: Finished difference Result 221 states and 264 transitions. [2021-01-06 16:57:04,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-01-06 16:57:04,272 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 168 [2021-01-06 16:57:04,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:57:04,273 INFO L225 Difference]: With dead ends: 221 [2021-01-06 16:57:04,273 INFO L226 Difference]: Without dead ends: 176 [2021-01-06 16:57:04,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3397 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=7548, Invalid=14802, Unknown=0, NotChecked=0, Total=22350 [2021-01-06 16:57:04,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-01-06 16:57:04,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 173. [2021-01-06 16:57:04,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2021-01-06 16:57:04,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 194 transitions. [2021-01-06 16:57:04,284 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 194 transitions. Word has length 168 [2021-01-06 16:57:04,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:57:04,284 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 194 transitions. [2021-01-06 16:57:04,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 87 states. [2021-01-06 16:57:04,285 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 194 transitions. [2021-01-06 16:57:04,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-01-06 16:57:04,286 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:57:04,286 INFO L422 BasicCegarLoop]: trace histogram [83, 62, 21, 1, 1, 1, 1, 1, 1] [2021-01-06 16:57:04,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:57:04,500 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:57:04,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:57:04,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1418784180, now seen corresponding path program 61 times [2021-01-06 16:57:04,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:57:04,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243729916] [2021-01-06 16:57:04,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:57:04,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:57:06,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 2583 proven. 3906 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-01-06 16:57:06,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243729916] [2021-01-06 16:57:06,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085470383] [2021-01-06 16:57:06,736 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 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 16:57:06,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:57:06,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 64 conjunts are in the unsatisfiable core [2021-01-06 16:57:06,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:57:07,013 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 2583 proven. 3906 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-01-06 16:57:07,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:57:07,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2021-01-06 16:57:07,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407521174] [2021-01-06 16:57:07,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-01-06 16:57:07,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:57:07,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-01-06 16:57:07,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2021-01-06 16:57:07,015 INFO L87 Difference]: Start difference. First operand 173 states and 194 transitions. Second operand 66 states. [2021-01-06 16:57:07,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:57:07,338 INFO L93 Difference]: Finished difference Result 220 states and 262 transitions. [2021-01-06 16:57:07,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-01-06 16:57:07,339 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 172 [2021-01-06 16:57:07,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:57:07,340 INFO L225 Difference]: With dead ends: 220 [2021-01-06 16:57:07,340 INFO L226 Difference]: Without dead ends: 175 [2021-01-06 16:57:07,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2021-01-06 16:57:07,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-01-06 16:57:07,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2021-01-06 16:57:07,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2021-01-06 16:57:07,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 196 transitions. [2021-01-06 16:57:07,352 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 196 transitions. Word has length 172 [2021-01-06 16:57:07,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:57:07,352 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 196 transitions. [2021-01-06 16:57:07,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2021-01-06 16:57:07,352 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 196 transitions. [2021-01-06 16:57:07,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-01-06 16:57:07,353 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:57:07,353 INFO L422 BasicCegarLoop]: trace histogram [84, 63, 21, 1, 1, 1, 1, 1, 1] [2021-01-06 16:57:07,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-01-06 16:57:07,567 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:57:07,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:57:07,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1942724969, now seen corresponding path program 62 times [2021-01-06 16:57:07,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:57:07,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704407716] [2021-01-06 16:57:07,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:57:07,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:57:09,784 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 2624 proven. 4032 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-01-06 16:57:09,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704407716] [2021-01-06 16:57:09,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041771419] [2021-01-06 16:57:09,785 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 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 16:57:09,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:57:09,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:57:09,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 65 conjunts are in the unsatisfiable core [2021-01-06 16:57:09,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:57:10,042 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 2624 proven. 4032 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-01-06 16:57:10,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:57:10,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 67 [2021-01-06 16:57:10,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865260254] [2021-01-06 16:57:10,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2021-01-06 16:57:10,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:57:10,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-01-06 16:57:10,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2021-01-06 16:57:10,045 INFO L87 Difference]: Start difference. First operand 175 states and 196 transitions. Second operand 67 states. [2021-01-06 16:57:10,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:57:10,365 INFO L93 Difference]: Finished difference Result 222 states and 264 transitions. [2021-01-06 16:57:10,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-01-06 16:57:10,365 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 174 [2021-01-06 16:57:10,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:57:10,367 INFO L225 Difference]: With dead ends: 222 [2021-01-06 16:57:10,367 INFO L226 Difference]: Without dead ends: 177 [2021-01-06 16:57:10,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2021-01-06 16:57:10,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-01-06 16:57:10,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2021-01-06 16:57:10,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2021-01-06 16:57:10,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 198 transitions. [2021-01-06 16:57:10,377 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 198 transitions. Word has length 174 [2021-01-06 16:57:10,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:57:10,378 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 198 transitions. [2021-01-06 16:57:10,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2021-01-06 16:57:10,378 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 198 transitions. [2021-01-06 16:57:10,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-01-06 16:57:10,378 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:57:10,379 INFO L422 BasicCegarLoop]: trace histogram [85, 64, 21, 1, 1, 1, 1, 1, 1] [2021-01-06 16:57:10,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:57:10,587 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:57:10,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:57:10,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1757356730, now seen corresponding path program 63 times [2021-01-06 16:57:10,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:57:10,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586393218] [2021-01-06 16:57:10,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:57:10,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:57:13,014 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 2665 proven. 4160 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-01-06 16:57:13,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586393218] [2021-01-06 16:57:13,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531196411] [2021-01-06 16:57:13,015 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 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 16:57:13,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2021-01-06 16:57:13,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:57:13,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 16:57:13,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:57:14,335 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:57:14,338 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:57:14,411 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 0 proven. 3065 refuted. 0 times theorem prover too weak. 4160 trivial. 0 not checked. [2021-01-06 16:57:14,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:57:14,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 26] total 91 [2021-01-06 16:57:14,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221139114] [2021-01-06 16:57:14,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 91 states [2021-01-06 16:57:14,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:57:14,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-01-06 16:57:14,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2491, Invalid=5699, Unknown=0, NotChecked=0, Total=8190 [2021-01-06 16:57:14,414 INFO L87 Difference]: Start difference. First operand 177 states and 198 transitions. Second operand 91 states. [2021-01-06 16:57:17,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:57:17,686 INFO L93 Difference]: Finished difference Result 231 states and 276 transitions. [2021-01-06 16:57:17,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-01-06 16:57:17,689 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 176 [2021-01-06 16:57:17,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:57:17,690 INFO L225 Difference]: With dead ends: 231 [2021-01-06 16:57:17,691 INFO L226 Difference]: Without dead ends: 184 [2021-01-06 16:57:17,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3724 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=8281, Invalid=16211, Unknown=0, NotChecked=0, Total=24492 [2021-01-06 16:57:17,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-01-06 16:57:17,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 181. [2021-01-06 16:57:17,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2021-01-06 16:57:17,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 203 transitions. [2021-01-06 16:57:17,702 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 203 transitions. Word has length 176 [2021-01-06 16:57:17,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:57:17,703 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 203 transitions. [2021-01-06 16:57:17,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 91 states. [2021-01-06 16:57:17,703 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 203 transitions. [2021-01-06 16:57:17,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-01-06 16:57:17,704 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:57:17,704 INFO L422 BasicCegarLoop]: trace histogram [87, 65, 22, 1, 1, 1, 1, 1, 1] [2021-01-06 16:57:17,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-01-06 16:57:17,920 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:57:17,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:57:17,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1944866494, now seen corresponding path program 64 times [2021-01-06 16:57:17,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:57:17,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318093974] [2021-01-06 16:57:17,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:57:17,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:57:20,375 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 2838 proven. 4290 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-01-06 16:57:20,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318093974] [2021-01-06 16:57:20,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685834031] [2021-01-06 16:57:20,376 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 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 16:57:20,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:57:20,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:57:20,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 67 conjunts are in the unsatisfiable core [2021-01-06 16:57:20,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:57:20,655 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 2838 proven. 4290 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-01-06 16:57:20,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:57:20,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 69 [2021-01-06 16:57:20,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998181938] [2021-01-06 16:57:20,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-01-06 16:57:20,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:57:20,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-01-06 16:57:20,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2021-01-06 16:57:20,658 INFO L87 Difference]: Start difference. First operand 181 states and 203 transitions. Second operand 69 states. [2021-01-06 16:57:21,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:57:21,047 INFO L93 Difference]: Finished difference Result 230 states and 274 transitions. [2021-01-06 16:57:21,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-01-06 16:57:21,047 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 180 [2021-01-06 16:57:21,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:57:21,049 INFO L225 Difference]: With dead ends: 230 [2021-01-06 16:57:21,049 INFO L226 Difference]: Without dead ends: 183 [2021-01-06 16:57:21,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2021-01-06 16:57:21,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-01-06 16:57:21,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2021-01-06 16:57:21,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2021-01-06 16:57:21,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 205 transitions. [2021-01-06 16:57:21,062 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 205 transitions. Word has length 180 [2021-01-06 16:57:21,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:57:21,062 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 205 transitions. [2021-01-06 16:57:21,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2021-01-06 16:57:21,062 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 205 transitions. [2021-01-06 16:57:21,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-01-06 16:57:21,063 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:57:21,064 INFO L422 BasicCegarLoop]: trace histogram [88, 66, 22, 1, 1, 1, 1, 1, 1] [2021-01-06 16:57:21,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-01-06 16:57:21,278 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:57:21,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:57:21,279 INFO L82 PathProgramCache]: Analyzing trace with hash -638218459, now seen corresponding path program 65 times [2021-01-06 16:57:21,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:57:21,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174062506] [2021-01-06 16:57:21,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:57:21,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:57:23,810 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 2881 proven. 4422 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-01-06 16:57:23,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174062506] [2021-01-06 16:57:23,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137273856] [2021-01-06 16:57:23,810 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 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 16:57:23,945 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 89 check-sat command(s) [2021-01-06 16:57:23,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:57:23,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 68 conjunts are in the unsatisfiable core [2021-01-06 16:57:23,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:57:24,158 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 2881 proven. 4422 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-01-06 16:57:24,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:57:24,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 70 [2021-01-06 16:57:24,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071746041] [2021-01-06 16:57:24,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-01-06 16:57:24,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:57:24,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-01-06 16:57:24,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2021-01-06 16:57:24,161 INFO L87 Difference]: Start difference. First operand 183 states and 205 transitions. Second operand 70 states. [2021-01-06 16:57:24,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:57:24,416 INFO L93 Difference]: Finished difference Result 232 states and 276 transitions. [2021-01-06 16:57:24,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-01-06 16:57:24,417 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 182 [2021-01-06 16:57:24,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:57:24,418 INFO L225 Difference]: With dead ends: 232 [2021-01-06 16:57:24,418 INFO L226 Difference]: Without dead ends: 185 [2021-01-06 16:57:24,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2021-01-06 16:57:24,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-01-06 16:57:24,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2021-01-06 16:57:24,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2021-01-06 16:57:24,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 207 transitions. [2021-01-06 16:57:24,430 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 207 transitions. Word has length 182 [2021-01-06 16:57:24,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:57:24,430 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 207 transitions. [2021-01-06 16:57:24,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2021-01-06 16:57:24,431 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 207 transitions. [2021-01-06 16:57:24,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-01-06 16:57:24,432 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:57:24,432 INFO L422 BasicCegarLoop]: trace histogram [89, 67, 22, 1, 1, 1, 1, 1, 1] [2021-01-06 16:57:24,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-01-06 16:57:24,647 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:57:24,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:57:24,647 INFO L82 PathProgramCache]: Analyzing trace with hash 920092744, now seen corresponding path program 66 times [2021-01-06 16:57:24,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:57:24,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629514763] [2021-01-06 16:57:24,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:57:24,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:57:27,278 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 2924 proven. 4556 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-01-06 16:57:27,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629514763] [2021-01-06 16:57:27,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074358989] [2021-01-06 16:57:27,278 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 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 16:57:27,474 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 87 check-sat command(s) [2021-01-06 16:57:27,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:57:27,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 32 conjunts are in the unsatisfiable core [2021-01-06 16:57:27,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:57:28,859 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:57:28,862 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:57:28,943 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 0 proven. 3365 refuted. 0 times theorem prover too weak. 4556 trivial. 0 not checked. [2021-01-06 16:57:28,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:57:28,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 27] total 95 [2021-01-06 16:57:28,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645678261] [2021-01-06 16:57:28,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 95 states [2021-01-06 16:57:28,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:57:28,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-01-06 16:57:28,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2719, Invalid=6211, Unknown=0, NotChecked=0, Total=8930 [2021-01-06 16:57:28,945 INFO L87 Difference]: Start difference. First operand 185 states and 207 transitions. Second operand 95 states. [2021-01-06 16:57:32,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:57:32,702 INFO L93 Difference]: Finished difference Result 241 states and 288 transitions. [2021-01-06 16:57:32,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-01-06 16:57:32,703 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 184 [2021-01-06 16:57:32,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:57:32,704 INFO L225 Difference]: With dead ends: 241 [2021-01-06 16:57:32,704 INFO L226 Difference]: Without dead ends: 192 [2021-01-06 16:57:32,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4066 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=9048, Invalid=17684, Unknown=0, NotChecked=0, Total=26732 [2021-01-06 16:57:32,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-01-06 16:57:32,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 189. [2021-01-06 16:57:32,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2021-01-06 16:57:32,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 212 transitions. [2021-01-06 16:57:32,716 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 212 transitions. Word has length 184 [2021-01-06 16:57:32,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:57:32,716 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 212 transitions. [2021-01-06 16:57:32,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 95 states. [2021-01-06 16:57:32,716 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 212 transitions. [2021-01-06 16:57:32,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-01-06 16:57:32,717 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:57:32,718 INFO L422 BasicCegarLoop]: trace histogram [91, 68, 23, 1, 1, 1, 1, 1, 1] [2021-01-06 16:57:32,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:57:32,933 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:57:32,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:57:32,933 INFO L82 PathProgramCache]: Analyzing trace with hash 746819664, now seen corresponding path program 67 times [2021-01-06 16:57:32,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:57:32,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735152018] [2021-01-06 16:57:32,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:57:32,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:57:35,662 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 3105 proven. 4692 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-01-06 16:57:35,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735152018] [2021-01-06 16:57:35,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119886729] [2021-01-06 16:57:35,663 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 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 16:57:35,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:57:35,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 70 conjunts are in the unsatisfiable core [2021-01-06 16:57:35,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:57:35,981 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 3105 proven. 4692 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-01-06 16:57:35,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:57:35,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 72 [2021-01-06 16:57:35,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882160567] [2021-01-06 16:57:35,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-01-06 16:57:35,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:57:35,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-01-06 16:57:35,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2021-01-06 16:57:35,985 INFO L87 Difference]: Start difference. First operand 189 states and 212 transitions. Second operand 72 states. [2021-01-06 16:57:36,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:57:36,388 INFO L93 Difference]: Finished difference Result 240 states and 286 transitions. [2021-01-06 16:57:36,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-01-06 16:57:36,389 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 188 [2021-01-06 16:57:36,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:57:36,390 INFO L225 Difference]: With dead ends: 240 [2021-01-06 16:57:36,390 INFO L226 Difference]: Without dead ends: 191 [2021-01-06 16:57:36,391 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2021-01-06 16:57:36,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-01-06 16:57:36,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2021-01-06 16:57:36,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2021-01-06 16:57:36,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 214 transitions. [2021-01-06 16:57:36,402 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 214 transitions. Word has length 188 [2021-01-06 16:57:36,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:57:36,402 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 214 transitions. [2021-01-06 16:57:36,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2021-01-06 16:57:36,402 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 214 transitions. [2021-01-06 16:57:36,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-01-06 16:57:36,403 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:57:36,403 INFO L422 BasicCegarLoop]: trace histogram [92, 69, 23, 1, 1, 1, 1, 1, 1] [2021-01-06 16:57:36,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:57:36,610 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:57:36,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:57:36,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1780032717, now seen corresponding path program 68 times [2021-01-06 16:57:36,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:57:36,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546988961] [2021-01-06 16:57:36,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:57:36,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:57:39,406 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 3150 proven. 4830 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-01-06 16:57:39,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546988961] [2021-01-06 16:57:39,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154666580] [2021-01-06 16:57:39,407 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 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 16:57:39,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:57:39,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:57:39,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 71 conjunts are in the unsatisfiable core [2021-01-06 16:57:39,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:57:39,697 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 3150 proven. 4830 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-01-06 16:57:39,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:57:39,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 73 [2021-01-06 16:57:39,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852852516] [2021-01-06 16:57:39,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 73 states [2021-01-06 16:57:39,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:57:39,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-01-06 16:57:39,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2021-01-06 16:57:39,699 INFO L87 Difference]: Start difference. First operand 191 states and 214 transitions. Second operand 73 states. [2021-01-06 16:57:40,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:57:40,105 INFO L93 Difference]: Finished difference Result 242 states and 288 transitions. [2021-01-06 16:57:40,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-01-06 16:57:40,106 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 190 [2021-01-06 16:57:40,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:57:40,109 INFO L225 Difference]: With dead ends: 242 [2021-01-06 16:57:40,109 INFO L226 Difference]: Without dead ends: 193 [2021-01-06 16:57:40,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2021-01-06 16:57:40,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-01-06 16:57:40,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2021-01-06 16:57:40,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2021-01-06 16:57:40,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 216 transitions. [2021-01-06 16:57:40,118 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 216 transitions. Word has length 190 [2021-01-06 16:57:40,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:57:40,118 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 216 transitions. [2021-01-06 16:57:40,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2021-01-06 16:57:40,118 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 216 transitions. [2021-01-06 16:57:40,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-01-06 16:57:40,119 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:57:40,119 INFO L422 BasicCegarLoop]: trace histogram [93, 70, 23, 1, 1, 1, 1, 1, 1] [2021-01-06 16:57:40,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:57:40,320 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:57:40,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:57:40,320 INFO L82 PathProgramCache]: Analyzing trace with hash 866318678, now seen corresponding path program 69 times [2021-01-06 16:57:40,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:57:40,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901402051] [2021-01-06 16:57:40,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:57:40,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:57:43,266 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 3195 proven. 4970 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-01-06 16:57:43,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901402051] [2021-01-06 16:57:43,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736792160] [2021-01-06 16:57:43,267 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 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 16:57:43,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2021-01-06 16:57:43,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:57:43,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 33 conjunts are in the unsatisfiable core [2021-01-06 16:57:43,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:57:44,874 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:57:44,875 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:57:44,962 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 0 proven. 3679 refuted. 0 times theorem prover too weak. 4970 trivial. 0 not checked. [2021-01-06 16:57:44,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:57:44,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 28] total 99 [2021-01-06 16:57:44,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865601028] [2021-01-06 16:57:44,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 99 states [2021-01-06 16:57:44,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:57:44,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-01-06 16:57:44,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2957, Invalid=6745, Unknown=0, NotChecked=0, Total=9702 [2021-01-06 16:57:44,964 INFO L87 Difference]: Start difference. First operand 193 states and 216 transitions. Second operand 99 states. [2021-01-06 16:57:49,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:57:49,105 INFO L93 Difference]: Finished difference Result 251 states and 300 transitions. [2021-01-06 16:57:49,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-01-06 16:57:49,105 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 192 [2021-01-06 16:57:49,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:57:49,107 INFO L225 Difference]: With dead ends: 251 [2021-01-06 16:57:49,107 INFO L226 Difference]: Without dead ends: 200 [2021-01-06 16:57:49,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4423 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=9849, Invalid=19221, Unknown=0, NotChecked=0, Total=29070 [2021-01-06 16:57:49,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-01-06 16:57:49,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 197. [2021-01-06 16:57:49,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2021-01-06 16:57:49,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 221 transitions. [2021-01-06 16:57:49,119 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 221 transitions. Word has length 192 [2021-01-06 16:57:49,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:57:49,120 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 221 transitions. [2021-01-06 16:57:49,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 99 states. [2021-01-06 16:57:49,120 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 221 transitions. [2021-01-06 16:57:49,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-01-06 16:57:49,120 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:57:49,121 INFO L422 BasicCegarLoop]: trace histogram [95, 71, 24, 1, 1, 1, 1, 1, 1] [2021-01-06 16:57:49,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-01-06 16:57:49,322 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:57:49,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:57:49,322 INFO L82 PathProgramCache]: Analyzing trace with hash -498029858, now seen corresponding path program 70 times [2021-01-06 16:57:49,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:57:49,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872910455] [2021-01-06 16:57:49,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:57:49,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:57:52,401 INFO L134 CoverageAnalysis]: Checked inductivity of 9025 backedges. 3384 proven. 5112 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2021-01-06 16:57:52,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872910455] [2021-01-06 16:57:52,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024510685] [2021-01-06 16:57:52,402 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 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 16:57:52,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:57:52,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:57:52,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 73 conjunts are in the unsatisfiable core [2021-01-06 16:57:52,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:57:52,734 INFO L134 CoverageAnalysis]: Checked inductivity of 9025 backedges. 3384 proven. 5112 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2021-01-06 16:57:52,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:57:52,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 75 [2021-01-06 16:57:52,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920977206] [2021-01-06 16:57:52,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2021-01-06 16:57:52,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:57:52,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-01-06 16:57:52,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2021-01-06 16:57:52,737 INFO L87 Difference]: Start difference. First operand 197 states and 221 transitions. Second operand 75 states. [2021-01-06 16:57:53,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:57:53,187 INFO L93 Difference]: Finished difference Result 250 states and 298 transitions. [2021-01-06 16:57:53,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-01-06 16:57:53,187 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 196 [2021-01-06 16:57:53,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:57:53,188 INFO L225 Difference]: With dead ends: 250 [2021-01-06 16:57:53,189 INFO L226 Difference]: Without dead ends: 199 [2021-01-06 16:57:53,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2021-01-06 16:57:53,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-01-06 16:57:53,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2021-01-06 16:57:53,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2021-01-06 16:57:53,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 223 transitions. [2021-01-06 16:57:53,202 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 223 transitions. Word has length 196 [2021-01-06 16:57:53,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:57:53,202 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 223 transitions. [2021-01-06 16:57:53,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2021-01-06 16:57:53,202 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 223 transitions. [2021-01-06 16:57:53,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-01-06 16:57:53,203 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:57:53,204 INFO L422 BasicCegarLoop]: trace histogram [96, 72, 24, 1, 1, 1, 1, 1, 1] [2021-01-06 16:57:53,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:57:53,418 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:57:53,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:57:53,419 INFO L82 PathProgramCache]: Analyzing trace with hash 2037932737, now seen corresponding path program 71 times [2021-01-06 16:57:53,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:57:53,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648465543] [2021-01-06 16:57:53,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:57:53,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:57:56,542 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 3431 proven. 5256 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2021-01-06 16:57:56,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648465543] [2021-01-06 16:57:56,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58673844] [2021-01-06 16:57:56,543 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 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 16:57:56,695 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 97 check-sat command(s) [2021-01-06 16:57:56,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:57:56,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 74 conjunts are in the unsatisfiable core [2021-01-06 16:57:56,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:57:56,879 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 3431 proven. 5256 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2021-01-06 16:57:56,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:57:56,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 76 [2021-01-06 16:57:56,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454438769] [2021-01-06 16:57:56,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2021-01-06 16:57:56,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:57:56,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-01-06 16:57:56,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2021-01-06 16:57:56,881 INFO L87 Difference]: Start difference. First operand 199 states and 223 transitions. Second operand 76 states. [2021-01-06 16:57:57,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:57:57,308 INFO L93 Difference]: Finished difference Result 252 states and 300 transitions. [2021-01-06 16:57:57,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-01-06 16:57:57,314 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 198 [2021-01-06 16:57:57,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:57:57,316 INFO L225 Difference]: With dead ends: 252 [2021-01-06 16:57:57,316 INFO L226 Difference]: Without dead ends: 201 [2021-01-06 16:57:57,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2021-01-06 16:57:57,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-01-06 16:57:57,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2021-01-06 16:57:57,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2021-01-06 16:57:57,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 225 transitions. [2021-01-06 16:57:57,328 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 225 transitions. Word has length 198 [2021-01-06 16:57:57,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:57:57,329 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 225 transitions. [2021-01-06 16:57:57,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2021-01-06 16:57:57,329 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 225 transitions. [2021-01-06 16:57:57,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-01-06 16:57:57,330 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:57:57,330 INFO L422 BasicCegarLoop]: trace histogram [97, 73, 24, 1, 1, 1, 1, 1, 1] [2021-01-06 16:57:57,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:57:57,545 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:57:57,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:57:57,545 INFO L82 PathProgramCache]: Analyzing trace with hash -443437596, now seen corresponding path program 72 times [2021-01-06 16:57:57,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:57:57,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754331878] [2021-01-06 16:57:57,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:57:57,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:58:00,812 INFO L134 CoverageAnalysis]: Checked inductivity of 9409 backedges. 3478 proven. 5402 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2021-01-06 16:58:00,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754331878] [2021-01-06 16:58:00,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481980895] [2021-01-06 16:58:00,812 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 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 16:58:01,034 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2021-01-06 16:58:01,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:58:01,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 34 conjunts are in the unsatisfiable core [2021-01-06 16:58:01,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:58:02,725 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:58:02,727 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:58:02,826 INFO L134 CoverageAnalysis]: Checked inductivity of 9409 backedges. 0 proven. 4007 refuted. 0 times theorem prover too weak. 5402 trivial. 0 not checked. [2021-01-06 16:58:02,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:58:02,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 29] total 103 [2021-01-06 16:58:02,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258359706] [2021-01-06 16:58:02,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 103 states [2021-01-06 16:58:02,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:58:02,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2021-01-06 16:58:02,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3205, Invalid=7301, Unknown=0, NotChecked=0, Total=10506 [2021-01-06 16:58:02,828 INFO L87 Difference]: Start difference. First operand 201 states and 225 transitions. Second operand 103 states. [2021-01-06 16:58:07,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:58:07,360 INFO L93 Difference]: Finished difference Result 261 states and 312 transitions. [2021-01-06 16:58:07,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-01-06 16:58:07,361 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 200 [2021-01-06 16:58:07,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:58:07,362 INFO L225 Difference]: With dead ends: 261 [2021-01-06 16:58:07,363 INFO L226 Difference]: Without dead ends: 208 [2021-01-06 16:58:07,364 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4795 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=10684, Invalid=20822, Unknown=0, NotChecked=0, Total=31506 [2021-01-06 16:58:07,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-01-06 16:58:07,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 205. [2021-01-06 16:58:07,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2021-01-06 16:58:07,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 230 transitions. [2021-01-06 16:58:07,375 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 230 transitions. Word has length 200 [2021-01-06 16:58:07,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:58:07,376 INFO L481 AbstractCegarLoop]: Abstraction has 205 states and 230 transitions. [2021-01-06 16:58:07,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 103 states. [2021-01-06 16:58:07,376 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 230 transitions. [2021-01-06 16:58:07,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-01-06 16:58:07,377 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:58:07,377 INFO L422 BasicCegarLoop]: trace histogram [99, 74, 25, 1, 1, 1, 1, 1, 1] [2021-01-06 16:58:07,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:58:07,592 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:58:07,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:58:07,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1520230164, now seen corresponding path program 73 times [2021-01-06 16:58:07,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:58:07,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355315943] [2021-01-06 16:58:07,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:58:07,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:58:11,057 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 3675 proven. 5550 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2021-01-06 16:58:11,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355315943] [2021-01-06 16:58:11,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616304706] [2021-01-06 16:58:11,058 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 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 16:58:11,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:58:11,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 76 conjunts are in the unsatisfiable core [2021-01-06 16:58:11,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:58:11,404 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 3675 proven. 5550 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2021-01-06 16:58:11,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:58:11,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 78 [2021-01-06 16:58:11,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299558821] [2021-01-06 16:58:11,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-01-06 16:58:11,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:58:11,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-01-06 16:58:11,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2021-01-06 16:58:11,407 INFO L87 Difference]: Start difference. First operand 205 states and 230 transitions. Second operand 78 states. [2021-01-06 16:58:11,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:58:11,820 INFO L93 Difference]: Finished difference Result 260 states and 310 transitions. [2021-01-06 16:58:11,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-01-06 16:58:11,821 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 204 [2021-01-06 16:58:11,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:58:11,822 INFO L225 Difference]: With dead ends: 260 [2021-01-06 16:58:11,822 INFO L226 Difference]: Without dead ends: 207 [2021-01-06 16:58:11,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2021-01-06 16:58:11,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-01-06 16:58:11,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2021-01-06 16:58:11,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2021-01-06 16:58:11,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 232 transitions. [2021-01-06 16:58:11,836 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 232 transitions. Word has length 204 [2021-01-06 16:58:11,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:58:11,836 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 232 transitions. [2021-01-06 16:58:11,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2021-01-06 16:58:11,836 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 232 transitions. [2021-01-06 16:58:11,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-01-06 16:58:11,838 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:58:11,838 INFO L422 BasicCegarLoop]: trace histogram [100, 75, 25, 1, 1, 1, 1, 1, 1] [2021-01-06 16:58:12,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-01-06 16:58:12,053 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:58:12,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:58:12,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1986902577, now seen corresponding path program 74 times [2021-01-06 16:58:12,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:58:12,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783679726] [2021-01-06 16:58:12,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:58:12,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:58:15,603 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 3724 proven. 5700 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2021-01-06 16:58:15,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783679726] [2021-01-06 16:58:15,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679510966] [2021-01-06 16:58:15,604 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 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 16:58:15,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:58:15,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:58:15,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 77 conjunts are in the unsatisfiable core [2021-01-06 16:58:15,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:58:15,909 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 3724 proven. 5700 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2021-01-06 16:58:15,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:58:15,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 79 [2021-01-06 16:58:15,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248338636] [2021-01-06 16:58:15,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 79 states [2021-01-06 16:58:15,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:58:15,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-01-06 16:58:15,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2021-01-06 16:58:15,912 INFO L87 Difference]: Start difference. First operand 207 states and 232 transitions. Second operand 79 states. [2021-01-06 16:58:16,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:58:16,253 INFO L93 Difference]: Finished difference Result 262 states and 312 transitions. [2021-01-06 16:58:16,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-01-06 16:58:16,254 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 206 [2021-01-06 16:58:16,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:58:16,256 INFO L225 Difference]: With dead ends: 262 [2021-01-06 16:58:16,256 INFO L226 Difference]: Without dead ends: 209 [2021-01-06 16:58:16,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2021-01-06 16:58:16,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-01-06 16:58:16,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2021-01-06 16:58:16,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2021-01-06 16:58:16,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 234 transitions. [2021-01-06 16:58:16,266 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 234 transitions. Word has length 206 [2021-01-06 16:58:16,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:58:16,266 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 234 transitions. [2021-01-06 16:58:16,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 79 states. [2021-01-06 16:58:16,267 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 234 transitions. [2021-01-06 16:58:16,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-01-06 16:58:16,267 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:58:16,267 INFO L422 BasicCegarLoop]: trace histogram [101, 76, 25, 1, 1, 1, 1, 1, 1] [2021-01-06 16:58:16,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:58:16,468 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:58:16,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:58:16,469 INFO L82 PathProgramCache]: Analyzing trace with hash 512474610, now seen corresponding path program 75 times [2021-01-06 16:58:16,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:58:16,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698169130] [2021-01-06 16:58:16,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:58:16,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:58:20,247 INFO L134 CoverageAnalysis]: Checked inductivity of 10201 backedges. 3773 proven. 5852 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2021-01-06 16:58:20,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698169130] [2021-01-06 16:58:20,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029754736] [2021-01-06 16:58:20,247 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 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 16:58:20,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 50 check-sat command(s) [2021-01-06 16:58:20,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:58:20,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 35 conjunts are in the unsatisfiable core [2021-01-06 16:58:20,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:58:22,275 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:58:22,276 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:58:22,376 INFO L134 CoverageAnalysis]: Checked inductivity of 10201 backedges. 0 proven. 4349 refuted. 0 times theorem prover too weak. 5852 trivial. 0 not checked. [2021-01-06 16:58:22,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:58:22,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 30] total 107 [2021-01-06 16:58:22,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504965856] [2021-01-06 16:58:22,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 107 states [2021-01-06 16:58:22,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:58:22,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2021-01-06 16:58:22,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3463, Invalid=7879, Unknown=0, NotChecked=0, Total=11342 [2021-01-06 16:58:22,378 INFO L87 Difference]: Start difference. First operand 209 states and 234 transitions. Second operand 107 states. [2021-01-06 16:58:27,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:58:27,517 INFO L93 Difference]: Finished difference Result 271 states and 324 transitions. [2021-01-06 16:58:27,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-01-06 16:58:27,518 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 208 [2021-01-06 16:58:27,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:58:27,520 INFO L225 Difference]: With dead ends: 271 [2021-01-06 16:58:27,520 INFO L226 Difference]: Without dead ends: 216 [2021-01-06 16:58:27,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5182 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=11553, Invalid=22487, Unknown=0, NotChecked=0, Total=34040 [2021-01-06 16:58:27,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-01-06 16:58:27,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 213. [2021-01-06 16:58:27,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2021-01-06 16:58:27,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 239 transitions. [2021-01-06 16:58:27,534 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 239 transitions. Word has length 208 [2021-01-06 16:58:27,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:58:27,534 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 239 transitions. [2021-01-06 16:58:27,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 107 states. [2021-01-06 16:58:27,534 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 239 transitions. [2021-01-06 16:58:27,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-01-06 16:58:27,535 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:58:27,536 INFO L422 BasicCegarLoop]: trace histogram [103, 77, 26, 1, 1, 1, 1, 1, 1] [2021-01-06 16:58:27,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:58:27,752 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:58:27,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:58:27,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1155853702, now seen corresponding path program 76 times [2021-01-06 16:58:27,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:58:27,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183281560] [2021-01-06 16:58:27,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:58:27,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:58:31,656 INFO L134 CoverageAnalysis]: Checked inductivity of 10609 backedges. 3978 proven. 6006 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2021-01-06 16:58:31,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183281560] [2021-01-06 16:58:31,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520391413] [2021-01-06 16:58:31,657 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 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 16:58:31,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:58:31,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:58:31,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 79 conjunts are in the unsatisfiable core [2021-01-06 16:58:31,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:58:32,006 INFO L134 CoverageAnalysis]: Checked inductivity of 10609 backedges. 3978 proven. 6006 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2021-01-06 16:58:32,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:58:32,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 81 [2021-01-06 16:58:32,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447395646] [2021-01-06 16:58:32,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 81 states [2021-01-06 16:58:32,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:58:32,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-01-06 16:58:32,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2021-01-06 16:58:32,008 INFO L87 Difference]: Start difference. First operand 213 states and 239 transitions. Second operand 81 states. [2021-01-06 16:58:32,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:58:32,534 INFO L93 Difference]: Finished difference Result 270 states and 322 transitions. [2021-01-06 16:58:32,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-01-06 16:58:32,536 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 212 [2021-01-06 16:58:32,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:58:32,537 INFO L225 Difference]: With dead ends: 270 [2021-01-06 16:58:32,537 INFO L226 Difference]: Without dead ends: 215 [2021-01-06 16:58:32,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2021-01-06 16:58:32,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-01-06 16:58:32,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2021-01-06 16:58:32,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2021-01-06 16:58:32,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 241 transitions. [2021-01-06 16:58:32,550 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 241 transitions. Word has length 212 [2021-01-06 16:58:32,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:58:32,551 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 241 transitions. [2021-01-06 16:58:32,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2021-01-06 16:58:32,551 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 241 transitions. [2021-01-06 16:58:32,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-01-06 16:58:32,552 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:58:32,552 INFO L422 BasicCegarLoop]: trace histogram [104, 78, 26, 1, 1, 1, 1, 1, 1] [2021-01-06 16:58:32,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-01-06 16:58:32,766 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:58:32,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:58:32,767 INFO L82 PathProgramCache]: Analyzing trace with hash 412394589, now seen corresponding path program 77 times [2021-01-06 16:58:32,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:58:32,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431023953] [2021-01-06 16:58:32,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:58:32,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:58:36,763 INFO L134 CoverageAnalysis]: Checked inductivity of 10816 backedges. 4029 proven. 6162 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2021-01-06 16:58:36,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431023953] [2021-01-06 16:58:36,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131250567] [2021-01-06 16:58:36,764 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 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 16:58:36,938 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 105 check-sat command(s) [2021-01-06 16:58:36,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:58:36,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 80 conjunts are in the unsatisfiable core [2021-01-06 16:58:36,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:58:37,201 INFO L134 CoverageAnalysis]: Checked inductivity of 10816 backedges. 4029 proven. 6162 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2021-01-06 16:58:37,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:58:37,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 82 [2021-01-06 16:58:37,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703368525] [2021-01-06 16:58:37,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-01-06 16:58:37,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:58:37,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-01-06 16:58:37,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2021-01-06 16:58:37,204 INFO L87 Difference]: Start difference. First operand 215 states and 241 transitions. Second operand 82 states. [2021-01-06 16:58:37,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:58:37,744 INFO L93 Difference]: Finished difference Result 272 states and 324 transitions. [2021-01-06 16:58:37,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-01-06 16:58:37,745 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 214 [2021-01-06 16:58:37,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:58:37,746 INFO L225 Difference]: With dead ends: 272 [2021-01-06 16:58:37,746 INFO L226 Difference]: Without dead ends: 217 [2021-01-06 16:58:37,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2021-01-06 16:58:37,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-01-06 16:58:37,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2021-01-06 16:58:37,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2021-01-06 16:58:37,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 243 transitions. [2021-01-06 16:58:37,759 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 243 transitions. Word has length 214 [2021-01-06 16:58:37,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:58:37,759 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 243 transitions. [2021-01-06 16:58:37,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2021-01-06 16:58:37,759 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 243 transitions. [2021-01-06 16:58:37,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-01-06 16:58:37,760 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:58:37,761 INFO L422 BasicCegarLoop]: trace histogram [105, 79, 26, 1, 1, 1, 1, 1, 1] [2021-01-06 16:58:37,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:58:37,976 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:58:37,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:58:37,976 INFO L82 PathProgramCache]: Analyzing trace with hash -34518656, now seen corresponding path program 78 times [2021-01-06 16:58:37,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:58:37,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410956326] [2021-01-06 16:58:37,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:58:38,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:58:42,131 INFO L134 CoverageAnalysis]: Checked inductivity of 11025 backedges. 4080 proven. 6320 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2021-01-06 16:58:42,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410956326] [2021-01-06 16:58:42,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316594208] [2021-01-06 16:58:42,131 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 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 16:58:42,365 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 103 check-sat command(s) [2021-01-06 16:58:42,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:58:42,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 16:58:42,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:58:44,528 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:58:44,529 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:58:44,647 INFO L134 CoverageAnalysis]: Checked inductivity of 11025 backedges. 0 proven. 4705 refuted. 0 times theorem prover too weak. 6320 trivial. 0 not checked. [2021-01-06 16:58:44,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:58:44,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 31] total 111 [2021-01-06 16:58:44,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368952422] [2021-01-06 16:58:44,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 111 states [2021-01-06 16:58:44,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:58:44,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2021-01-06 16:58:44,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3731, Invalid=8479, Unknown=0, NotChecked=0, Total=12210 [2021-01-06 16:58:44,649 INFO L87 Difference]: Start difference. First operand 217 states and 243 transitions. Second operand 111 states. [2021-01-06 16:58:50,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:58:50,394 INFO L93 Difference]: Finished difference Result 281 states and 336 transitions. [2021-01-06 16:58:50,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-01-06 16:58:50,395 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 216 [2021-01-06 16:58:50,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:58:50,396 INFO L225 Difference]: With dead ends: 281 [2021-01-06 16:58:50,396 INFO L226 Difference]: Without dead ends: 224 [2021-01-06 16:58:50,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5584 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=12456, Invalid=24216, Unknown=0, NotChecked=0, Total=36672 [2021-01-06 16:58:50,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-01-06 16:58:50,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 221. [2021-01-06 16:58:50,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2021-01-06 16:58:50,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 248 transitions. [2021-01-06 16:58:50,408 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 248 transitions. Word has length 216 [2021-01-06 16:58:50,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:58:50,409 INFO L481 AbstractCegarLoop]: Abstraction has 221 states and 248 transitions. [2021-01-06 16:58:50,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 111 states. [2021-01-06 16:58:50,409 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 248 transitions. [2021-01-06 16:58:50,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-01-06 16:58:50,410 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:58:50,410 INFO L422 BasicCegarLoop]: trace histogram [107, 80, 27, 1, 1, 1, 1, 1, 1] [2021-01-06 16:58:50,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:58:50,611 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:58:50,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:58:50,611 INFO L82 PathProgramCache]: Analyzing trace with hash 944807816, now seen corresponding path program 79 times [2021-01-06 16:58:50,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:58:50,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795836410] [2021-01-06 16:58:50,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:58:50,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:58:54,967 INFO L134 CoverageAnalysis]: Checked inductivity of 11449 backedges. 4293 proven. 6480 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2021-01-06 16:58:54,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795836410] [2021-01-06 16:58:54,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730498204] [2021-01-06 16:58:54,968 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 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 16:58:55,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:58:55,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 82 conjunts are in the unsatisfiable core [2021-01-06 16:58:55,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:58:55,363 INFO L134 CoverageAnalysis]: Checked inductivity of 11449 backedges. 4293 proven. 6480 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2021-01-06 16:58:55,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:58:55,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 84 [2021-01-06 16:58:55,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559450405] [2021-01-06 16:58:55,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 84 states [2021-01-06 16:58:55,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:58:55,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-01-06 16:58:55,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2021-01-06 16:58:55,365 INFO L87 Difference]: Start difference. First operand 221 states and 248 transitions. Second operand 84 states. [2021-01-06 16:58:55,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:58:55,812 INFO L93 Difference]: Finished difference Result 280 states and 334 transitions. [2021-01-06 16:58:55,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-01-06 16:58:55,813 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 220 [2021-01-06 16:58:55,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:58:55,815 INFO L225 Difference]: With dead ends: 280 [2021-01-06 16:58:55,815 INFO L226 Difference]: Without dead ends: 223 [2021-01-06 16:58:55,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2021-01-06 16:58:55,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-01-06 16:58:55,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2021-01-06 16:58:55,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2021-01-06 16:58:55,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 250 transitions. [2021-01-06 16:58:55,824 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 250 transitions. Word has length 220 [2021-01-06 16:58:55,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:58:55,825 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 250 transitions. [2021-01-06 16:58:55,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2021-01-06 16:58:55,825 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 250 transitions. [2021-01-06 16:58:55,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-01-06 16:58:55,827 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:58:55,827 INFO L422 BasicCegarLoop]: trace histogram [108, 81, 27, 1, 1, 1, 1, 1, 1] [2021-01-06 16:58:56,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:58:56,028 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:58:56,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:58:56,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1213701739, now seen corresponding path program 80 times [2021-01-06 16:58:56,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:58:56,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080058923] [2021-01-06 16:58:56,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:58:56,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat