/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/loop-new/nested-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:53:36,139 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:53:36,142 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:53:36,178 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:53:36,179 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:53:36,181 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:53:36,183 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:53:36,185 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:53:36,187 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:53:36,189 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:53:36,190 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:53:36,192 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:53:36,193 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:53:36,194 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:53:36,196 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:53:36,197 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:53:36,199 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:53:36,200 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:53:36,203 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:53:36,205 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:53:36,207 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:53:36,209 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:53:36,211 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:53:36,223 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:53:36,230 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 16:53:36,241 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 16:53:36,242 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 16:53:36,244 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 16:53:36,246 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 16:53:36,248 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 16:53:36,249 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 16:53:36,249 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 16:53:36,250 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 16:53:36,253 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:53:36,254 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:53:36,259 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:53:36,260 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 16:53:36,316 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:53:36,316 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:53:36,318 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:53:36,319 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:53:36,319 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:53:36,320 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:53:36,320 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:53:36,320 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:53:36,321 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:53:36,321 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:53:36,322 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:53:36,322 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:53:36,322 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:53:36,323 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:53:36,323 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:53:36,323 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:53:36,323 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:53:36,324 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:53:36,324 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:53:36,324 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:53:36,324 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:53:36,324 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:53:36,325 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:53:36,325 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:53:36,325 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:53:36,325 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:53:36,804 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:53:36,833 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:53:36,836 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:53:36,838 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:53:36,839 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:53:36,840 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-new/nested-1.i [2021-01-06 16:53:36,942 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/957fbb78a/dc3538c991544f849ed566d9ed52a7da/FLAG22c3c2f53 [2021-01-06 16:53:37,583 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:53:37,584 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-new/nested-1.i [2021-01-06 16:53:37,595 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/957fbb78a/dc3538c991544f849ed566d9ed52a7da/FLAG22c3c2f53 [2021-01-06 16:53:37,912 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/957fbb78a/dc3538c991544f849ed566d9ed52a7da [2021-01-06 16:53:37,915 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:53:37,917 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:53:37,922 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:53:37,922 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:53:37,927 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:53:37,928 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:53:37" (1/1) ... [2021-01-06 16:53:37,929 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28f5cd25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:53:37, skipping insertion in model container [2021-01-06 16:53:37,929 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:53:37" (1/1) ... [2021-01-06 16:53:37,938 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:53:37,956 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 16:53:38,118 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-new/nested-1.i[891,904] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] [2021-01-06 16:53:38,135 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:53:38,147 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 16:53:38,162 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-new/nested-1.i[891,904] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] [2021-01-06 16:53:38,167 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:53:38,185 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:53:38,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:53:38 WrapperNode [2021-01-06 16:53:38,186 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:53:38,188 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:53:38,188 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:53:38,188 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:53:38,197 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:53:38" (1/1) ... [2021-01-06 16:53:38,205 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:53:38" (1/1) ... [2021-01-06 16:53:38,226 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:53:38,227 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:53:38,227 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:53:38,228 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:53:38,237 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:53:38" (1/1) ... [2021-01-06 16:53:38,237 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:53:38" (1/1) ... [2021-01-06 16:53:38,239 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:53:38" (1/1) ... [2021-01-06 16:53:38,239 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:53:38" (1/1) ... [2021-01-06 16:53:38,243 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:53:38" (1/1) ... [2021-01-06 16:53:38,248 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:53:38" (1/1) ... [2021-01-06 16:53:38,249 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:53:38" (1/1) ... [2021-01-06 16:53:38,252 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:53:38,253 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:53:38,253 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:53:38,253 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:53:38,254 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:53:38" (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 16:53:38,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:53:38,387 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:53:38,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:53:38,387 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:53:38,656 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:53:38,656 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-01-06 16:53:38,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:53:38 BoogieIcfgContainer [2021-01-06 16:53:38,659 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:53:38,661 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:53:38,661 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:53:38,665 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:53:38,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:53:37" (1/3) ... [2021-01-06 16:53:38,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b2a3491 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:53:38, skipping insertion in model container [2021-01-06 16:53:38,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:53:38" (2/3) ... [2021-01-06 16:53:38,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b2a3491 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:53:38, skipping insertion in model container [2021-01-06 16:53:38,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:53:38" (3/3) ... [2021-01-06 16:53:38,671 INFO L111 eAbstractionObserver]: Analyzing ICFG nested-1.i [2021-01-06 16:53:38,680 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:53:38,686 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 16:53:38,739 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 16:53:38,802 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:53:38,802 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:53:38,802 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:53:38,803 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:53:38,803 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:53:38,803 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:53:38,803 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:53:38,804 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:53:38,872 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2021-01-06 16:53:38,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 16:53:38,890 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:38,891 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:38,892 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:38,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:38,931 INFO L82 PathProgramCache]: Analyzing trace with hash 179613278, now seen corresponding path program 1 times [2021-01-06 16:53:38,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:38,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322741526] [2021-01-06 16:53:38,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:39,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:39,332 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 16:53:39,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322741526] [2021-01-06 16:53:39,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:53:39,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 16:53:39,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921704748] [2021-01-06 16:53:39,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 16:53:39,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:39,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 16:53:39,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 16:53:39,379 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 4 states. [2021-01-06 16:53:39,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:39,482 INFO L93 Difference]: Finished difference Result 35 states and 48 transitions. [2021-01-06 16:53:39,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 16:53:39,485 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2021-01-06 16:53:39,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:39,501 INFO L225 Difference]: With dead ends: 35 [2021-01-06 16:53:39,501 INFO L226 Difference]: Without dead ends: 16 [2021-01-06 16:53:39,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 16:53:39,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-01-06 16:53:39,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 13. [2021-01-06 16:53:39,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-01-06 16:53:39,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-01-06 16:53:39,550 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 8 [2021-01-06 16:53:39,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:39,550 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-01-06 16:53:39,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 16:53:39,551 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-01-06 16:53:39,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 16:53:39,552 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:39,552 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:39,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:53:39,554 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:39,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:39,558 INFO L82 PathProgramCache]: Analyzing trace with hash 754200042, now seen corresponding path program 1 times [2021-01-06 16:53:39,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:39,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743592922] [2021-01-06 16:53:39,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:39,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:39,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:39,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743592922] [2021-01-06 16:53:39,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:53:39,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 16:53:39,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814874920] [2021-01-06 16:53:39,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 16:53:39,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:39,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 16:53:39,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 16:53:39,670 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 4 states. [2021-01-06 16:53:39,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:39,713 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2021-01-06 16:53:39,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 16:53:39,714 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2021-01-06 16:53:39,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:39,716 INFO L225 Difference]: With dead ends: 23 [2021-01-06 16:53:39,716 INFO L226 Difference]: Without dead ends: 15 [2021-01-06 16:53:39,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 16:53:39,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-01-06 16:53:39,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2021-01-06 16:53:39,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-01-06 16:53:39,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-01-06 16:53:39,728 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2021-01-06 16:53:39,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:39,729 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-01-06 16:53:39,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 16:53:39,730 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-01-06 16:53:39,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 16:53:39,732 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:39,732 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:39,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 16:53:39,733 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:39,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:39,734 INFO L82 PathProgramCache]: Analyzing trace with hash -902976276, now seen corresponding path program 1 times [2021-01-06 16:53:39,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:39,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113857407] [2021-01-06 16:53:39,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:39,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:39,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:39,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113857407] [2021-01-06 16:53:39,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106101700] [2021-01-06 16:53:39,833 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 16:53:39,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:39,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 16:53:39,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:39,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:39,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:39,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-01-06 16:53:39,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10624747] [2021-01-06 16:53:39,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 16:53:39,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:39,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 16:53:39,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:53:39,983 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 7 states. [2021-01-06 16:53:40,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:40,011 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2021-01-06 16:53:40,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 16:53:40,011 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2021-01-06 16:53:40,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:40,012 INFO L225 Difference]: With dead ends: 26 [2021-01-06 16:53:40,012 INFO L226 Difference]: Without dead ends: 17 [2021-01-06 16:53:40,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:53:40,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-01-06 16:53:40,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2021-01-06 16:53:40,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-01-06 16:53:40,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-01-06 16:53:40,018 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2021-01-06 16:53:40,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:40,018 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-01-06 16:53:40,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 16:53:40,019 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-01-06 16:53:40,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 16:53:40,020 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:40,020 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:40,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 16:53:40,234 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:40,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:40,236 INFO L82 PathProgramCache]: Analyzing trace with hash -16551058, now seen corresponding path program 2 times [2021-01-06 16:53:40,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:40,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007316916] [2021-01-06 16:53:40,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:40,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:40,334 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:40,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007316916] [2021-01-06 16:53:40,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771133590] [2021-01-06 16:53:40,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:40,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:53:40,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:40,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 16:53:40,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:40,466 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:40,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:40,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-01-06 16:53:40,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170346245] [2021-01-06 16:53:40,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 16:53:40,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:40,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 16:53:40,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:53:40,469 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 9 states. [2021-01-06 16:53:40,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:40,515 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-01-06 16:53:40,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 16:53:40,516 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2021-01-06 16:53:40,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:40,517 INFO L225 Difference]: With dead ends: 30 [2021-01-06 16:53:40,517 INFO L226 Difference]: Without dead ends: 19 [2021-01-06 16:53:40,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:53:40,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-01-06 16:53:40,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-01-06 16:53:40,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-01-06 16:53:40,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-01-06 16:53:40,524 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2021-01-06 16:53:40,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:40,525 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-01-06 16:53:40,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 16:53:40,525 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-01-06 16:53:40,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 16:53:40,526 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:40,526 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:40,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:40,743 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:40,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:40,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1434558832, now seen corresponding path program 3 times [2021-01-06 16:53:40,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:40,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810598562] [2021-01-06 16:53:40,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:40,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:40,872 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:40,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810598562] [2021-01-06 16:53:40,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776601427] [2021-01-06 16:53:40,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:40,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 16:53:40,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:40,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 16:53:40,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:41,027 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 16:53:41,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:41,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-01-06 16:53:41,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25489145] [2021-01-06 16:53:41,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 16:53:41,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:41,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 16:53:41,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:53:41,032 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 10 states. [2021-01-06 16:53:41,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:41,357 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2021-01-06 16:53:41,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 16:53:41,357 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2021-01-06 16:53:41,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:41,360 INFO L225 Difference]: With dead ends: 57 [2021-01-06 16:53:41,360 INFO L226 Difference]: Without dead ends: 44 [2021-01-06 16:53:41,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=207, Invalid=393, Unknown=0, NotChecked=0, Total=600 [2021-01-06 16:53:41,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-01-06 16:53:41,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2021-01-06 16:53:41,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 16:53:41,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-01-06 16:53:41,393 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 17 [2021-01-06 16:53:41,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:41,394 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-01-06 16:53:41,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 16:53:41,395 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-01-06 16:53:41,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-01-06 16:53:41,396 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:41,397 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:41,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:41,611 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:41,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:41,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1316009506, now seen corresponding path program 4 times [2021-01-06 16:53:41,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:41,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322477970] [2021-01-06 16:53:41,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:41,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:41,709 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 43 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-01-06 16:53:41,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322477970] [2021-01-06 16:53:41,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415718169] [2021-01-06 16:53:41,710 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:41,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:53:41,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:41,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 16:53:41,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:41,909 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 43 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-01-06 16:53:41,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:41,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-01-06 16:53:41,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700813217] [2021-01-06 16:53:41,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 16:53:41,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:41,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 16:53:41,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:53:41,912 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 13 states. [2021-01-06 16:53:41,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:41,968 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2021-01-06 16:53:41,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 16:53:41,969 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2021-01-06 16:53:41,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:41,970 INFO L225 Difference]: With dead ends: 54 [2021-01-06 16:53:41,971 INFO L226 Difference]: Without dead ends: 37 [2021-01-06 16:53:41,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:53:41,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-01-06 16:53:41,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2021-01-06 16:53:41,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 16:53:41,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2021-01-06 16:53:41,978 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 30 [2021-01-06 16:53:41,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:41,979 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2021-01-06 16:53:41,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 16:53:41,979 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2021-01-06 16:53:41,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 16:53:41,980 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:41,980 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:42,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:42,194 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:42,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:42,196 INFO L82 PathProgramCache]: Analyzing trace with hash 158921246, now seen corresponding path program 5 times [2021-01-06 16:53:42,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:42,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374712658] [2021-01-06 16:53:42,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:42,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:42,311 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 63 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-01-06 16:53:42,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374712658] [2021-01-06 16:53:42,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885585350] [2021-01-06 16:53:42,312 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:42,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-01-06 16:53:42,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:42,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 16:53:42,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:42,557 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 63 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-01-06 16:53:42,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:42,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-01-06 16:53:42,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57412084] [2021-01-06 16:53:42,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 16:53:42,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:42,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 16:53:42,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-06 16:53:42,560 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 15 states. [2021-01-06 16:53:42,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:42,619 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2021-01-06 16:53:42,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 16:53:42,620 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2021-01-06 16:53:42,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:42,621 INFO L225 Difference]: With dead ends: 60 [2021-01-06 16:53:42,621 INFO L226 Difference]: Without dead ends: 41 [2021-01-06 16:53:42,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-06 16:53:42,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-01-06 16:53:42,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2021-01-06 16:53:42,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 16:53:42,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2021-01-06 16:53:42,630 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 34 [2021-01-06 16:53:42,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:42,630 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2021-01-06 16:53:42,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 16:53:42,630 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2021-01-06 16:53:42,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-06 16:53:42,631 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:42,632 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:42,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-06 16:53:42,847 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:42,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:42,848 INFO L82 PathProgramCache]: Analyzing trace with hash -244827298, now seen corresponding path program 6 times [2021-01-06 16:53:42,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:42,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780599058] [2021-01-06 16:53:42,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:42,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:42,977 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 87 proven. 36 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-01-06 16:53:42,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780599058] [2021-01-06 16:53:42,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34478924] [2021-01-06 16:53:42,978 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:43,023 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-06 16:53:43,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:43,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 16:53:43,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:43,152 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-01-06 16:53:43,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:43,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2021-01-06 16:53:43,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394461144] [2021-01-06 16:53:43,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 16:53:43,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:43,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 16:53:43,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-01-06 16:53:43,156 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 14 states. [2021-01-06 16:53:43,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:43,956 INFO L93 Difference]: Finished difference Result 101 states and 111 transitions. [2021-01-06 16:53:43,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-06 16:53:43,956 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2021-01-06 16:53:43,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:43,964 INFO L225 Difference]: With dead ends: 101 [2021-01-06 16:53:43,964 INFO L226 Difference]: Without dead ends: 80 [2021-01-06 16:53:43,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=669, Invalid=1401, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 16:53:43,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-01-06 16:53:43,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 60. [2021-01-06 16:53:43,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-01-06 16:53:43,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2021-01-06 16:53:43,997 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 38 [2021-01-06 16:53:43,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:43,999 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2021-01-06 16:53:43,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 16:53:43,999 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2021-01-06 16:53:44,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-01-06 16:53:44,002 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:44,002 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:44,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:44,219 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:44,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:44,220 INFO L82 PathProgramCache]: Analyzing trace with hash -2099079880, now seen corresponding path program 7 times [2021-01-06 16:53:44,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:44,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673114704] [2021-01-06 16:53:44,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:44,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:44,360 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 229 proven. 49 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2021-01-06 16:53:44,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673114704] [2021-01-06 16:53:44,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28389147] [2021-01-06 16:53:44,361 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:44,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:44,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 16:53:44,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:44,623 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 229 proven. 49 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2021-01-06 16:53:44,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:44,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-06 16:53:44,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107495492] [2021-01-06 16:53:44,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 16:53:44,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:44,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 16:53:44,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 16:53:44,626 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand 19 states. [2021-01-06 16:53:44,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:44,696 INFO L93 Difference]: Finished difference Result 109 states and 117 transitions. [2021-01-06 16:53:44,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 16:53:44,697 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 59 [2021-01-06 16:53:44,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:44,698 INFO L225 Difference]: With dead ends: 109 [2021-01-06 16:53:44,698 INFO L226 Difference]: Without dead ends: 69 [2021-01-06 16:53:44,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 16:53:44,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-01-06 16:53:44,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2021-01-06 16:53:44,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-01-06 16:53:44,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2021-01-06 16:53:44,709 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 59 [2021-01-06 16:53:44,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:44,710 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2021-01-06 16:53:44,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 16:53:44,710 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2021-01-06 16:53:44,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-01-06 16:53:44,711 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:44,711 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:44,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:44,926 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:44,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:44,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1083775622, now seen corresponding path program 8 times [2021-01-06 16:53:44,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:44,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786550168] [2021-01-06 16:53:44,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:44,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:45,102 INFO L134 CoverageAnalysis]: Checked inductivity of 636 backedges. 293 proven. 64 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2021-01-06 16:53:45,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786550168] [2021-01-06 16:53:45,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437111112] [2021-01-06 16:53:45,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:45,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:53:45,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:45,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 16:53:45,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:45,426 INFO L134 CoverageAnalysis]: Checked inductivity of 636 backedges. 293 proven. 64 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2021-01-06 16:53:45,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:45,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-06 16:53:45,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484697492] [2021-01-06 16:53:45,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 16:53:45,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:45,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 16:53:45,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 16:53:45,430 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand 21 states. [2021-01-06 16:53:45,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:45,497 INFO L93 Difference]: Finished difference Result 119 states and 127 transitions. [2021-01-06 16:53:45,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 16:53:45,497 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 65 [2021-01-06 16:53:45,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:45,498 INFO L225 Difference]: With dead ends: 119 [2021-01-06 16:53:45,498 INFO L226 Difference]: Without dead ends: 75 [2021-01-06 16:53:45,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 16:53:45,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-01-06 16:53:45,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2021-01-06 16:53:45,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-01-06 16:53:45,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2021-01-06 16:53:45,511 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 65 [2021-01-06 16:53:45,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:45,511 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2021-01-06 16:53:45,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 16:53:45,512 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2021-01-06 16:53:45,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-06 16:53:45,513 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:45,513 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:45,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 16:53:45,728 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:45,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:45,729 INFO L82 PathProgramCache]: Analyzing trace with hash 832519228, now seen corresponding path program 9 times [2021-01-06 16:53:45,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:45,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617037290] [2021-01-06 16:53:45,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:45,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:45,903 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 365 proven. 81 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2021-01-06 16:53:45,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617037290] [2021-01-06 16:53:45,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776970041] [2021-01-06 16:53:45,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:46,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2021-01-06 16:53:46,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:46,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 16:53:46,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:46,293 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 367 proven. 81 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2021-01-06 16:53:46,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:46,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-06 16:53:46,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039923967] [2021-01-06 16:53:46,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 16:53:46,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:46,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 16:53:46,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=298, Unknown=0, NotChecked=0, Total=506 [2021-01-06 16:53:46,297 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand 23 states. [2021-01-06 16:53:46,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:46,386 INFO L93 Difference]: Finished difference Result 129 states and 137 transitions. [2021-01-06 16:53:46,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 16:53:46,386 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 71 [2021-01-06 16:53:46,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:46,387 INFO L225 Difference]: With dead ends: 129 [2021-01-06 16:53:46,387 INFO L226 Difference]: Without dead ends: 81 [2021-01-06 16:53:46,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=223, Invalid=329, Unknown=0, NotChecked=0, Total=552 [2021-01-06 16:53:46,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-01-06 16:53:46,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2021-01-06 16:53:46,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-01-06 16:53:46,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2021-01-06 16:53:46,414 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 71 [2021-01-06 16:53:46,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:46,414 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2021-01-06 16:53:46,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 16:53:46,415 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2021-01-06 16:53:46,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-01-06 16:53:46,423 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:46,423 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:46,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:46,637 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:46,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:46,638 INFO L82 PathProgramCache]: Analyzing trace with hash -202032770, now seen corresponding path program 10 times [2021-01-06 16:53:46,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:46,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621792487] [2021-01-06 16:53:46,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:46,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:46,809 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2021-01-06 16:53:46,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621792487] [2021-01-06 16:53:46,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780257586] [2021-01-06 16:53:46,810 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:46,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:53:46,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:46,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 16:53:46,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:47,060 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2021-01-06 16:53:47,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:47,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-01-06 16:53:47,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222474013] [2021-01-06 16:53:47,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 16:53:47,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:47,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 16:53:47,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:53:47,062 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand 11 states. [2021-01-06 16:53:47,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:47,104 INFO L93 Difference]: Finished difference Result 127 states and 132 transitions. [2021-01-06 16:53:47,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 16:53:47,104 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 77 [2021-01-06 16:53:47,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:47,106 INFO L225 Difference]: With dead ends: 127 [2021-01-06 16:53:47,106 INFO L226 Difference]: Without dead ends: 123 [2021-01-06 16:53:47,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:53:47,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-01-06 16:53:47,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 101. [2021-01-06 16:53:47,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2021-01-06 16:53:47,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2021-01-06 16:53:47,119 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 77 [2021-01-06 16:53:47,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:47,119 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2021-01-06 16:53:47,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 16:53:47,120 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2021-01-06 16:53:47,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-01-06 16:53:47,121 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:47,121 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:47,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:47,335 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:47,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:47,337 INFO L82 PathProgramCache]: Analyzing trace with hash -112220578, now seen corresponding path program 11 times [2021-01-06 16:53:47,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:47,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224010330] [2021-01-06 16:53:47,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:47,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:47,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1742 backedges. 0 proven. 1342 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-01-06 16:53:47,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224010330] [2021-01-06 16:53:47,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637306270] [2021-01-06 16:53:47,536 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:47,645 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2021-01-06 16:53:47,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:47,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 16:53:47,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:47,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1742 backedges. 0 proven. 1342 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-01-06 16:53:47,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:47,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-01-06 16:53:47,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883608923] [2021-01-06 16:53:47,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 16:53:47,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:47,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 16:53:47,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:53:47,854 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand 13 states. [2021-01-06 16:53:47,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:47,902 INFO L93 Difference]: Finished difference Result 150 states and 156 transitions. [2021-01-06 16:53:47,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 16:53:47,903 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 100 [2021-01-06 16:53:47,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:47,904 INFO L225 Difference]: With dead ends: 150 [2021-01-06 16:53:47,904 INFO L226 Difference]: Without dead ends: 146 [2021-01-06 16:53:47,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:53:47,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-01-06 16:53:47,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 124. [2021-01-06 16:53:47,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2021-01-06 16:53:47,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 129 transitions. [2021-01-06 16:53:47,919 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 129 transitions. Word has length 100 [2021-01-06 16:53:47,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:47,919 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 129 transitions. [2021-01-06 16:53:47,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 16:53:47,919 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 129 transitions. [2021-01-06 16:53:47,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-01-06 16:53:47,921 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:47,921 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:48,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 16:53:48,132 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:48,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:48,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1202143874, now seen corresponding path program 12 times [2021-01-06 16:53:48,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:48,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412710700] [2021-01-06 16:53:48,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:48,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:48,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2735 backedges. 0 proven. 2235 refuted. 0 times theorem prover too weak. 500 trivial. 0 not checked. [2021-01-06 16:53:48,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412710700] [2021-01-06 16:53:48,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053464395] [2021-01-06 16:53:48,313 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:48,483 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2021-01-06 16:53:48,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:48,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 16:53:48,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:48,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2735 backedges. 0 proven. 2235 refuted. 0 times theorem prover too weak. 500 trivial. 0 not checked. [2021-01-06 16:53:48,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:48,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-01-06 16:53:48,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060914819] [2021-01-06 16:53:48,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 16:53:48,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:48,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 16:53:48,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-06 16:53:48,741 INFO L87 Difference]: Start difference. First operand 124 states and 129 transitions. Second operand 15 states. [2021-01-06 16:53:48,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:48,807 INFO L93 Difference]: Finished difference Result 173 states and 180 transitions. [2021-01-06 16:53:48,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 16:53:48,807 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 123 [2021-01-06 16:53:48,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:48,809 INFO L225 Difference]: With dead ends: 173 [2021-01-06 16:53:48,809 INFO L226 Difference]: Without dead ends: 169 [2021-01-06 16:53:48,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-06 16:53:48,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-01-06 16:53:48,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 147. [2021-01-06 16:53:48,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2021-01-06 16:53:48,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 153 transitions. [2021-01-06 16:53:48,843 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 153 transitions. Word has length 123 [2021-01-06 16:53:48,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:48,844 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 153 transitions. [2021-01-06 16:53:48,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 16:53:48,844 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 153 transitions. [2021-01-06 16:53:48,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-01-06 16:53:48,846 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:48,846 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:49,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 16:53:49,061 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:49,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:49,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1019764130, now seen corresponding path program 13 times [2021-01-06 16:53:49,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:49,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543586691] [2021-01-06 16:53:49,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:49,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:49,264 INFO L134 CoverageAnalysis]: Checked inductivity of 3951 backedges. 0 proven. 3351 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2021-01-06 16:53:49,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543586691] [2021-01-06 16:53:49,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121519948] [2021-01-06 16:53:49,265 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:49,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:49,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 16:53:49,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:49,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3951 backedges. 0 proven. 3351 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2021-01-06 16:53:49,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:49,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-01-06 16:53:49,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099105782] [2021-01-06 16:53:49,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 16:53:49,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:49,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 16:53:49,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 16:53:49,784 INFO L87 Difference]: Start difference. First operand 147 states and 153 transitions. Second operand 17 states. [2021-01-06 16:53:49,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:49,862 INFO L93 Difference]: Finished difference Result 196 states and 204 transitions. [2021-01-06 16:53:49,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 16:53:49,863 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 146 [2021-01-06 16:53:49,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:49,865 INFO L225 Difference]: With dead ends: 196 [2021-01-06 16:53:49,865 INFO L226 Difference]: Without dead ends: 192 [2021-01-06 16:53:49,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 16:53:49,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-01-06 16:53:49,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 170. [2021-01-06 16:53:49,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2021-01-06 16:53:49,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 177 transitions. [2021-01-06 16:53:49,883 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 177 transitions. Word has length 146 [2021-01-06 16:53:49,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:49,884 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 177 transitions. [2021-01-06 16:53:49,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 16:53:49,884 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 177 transitions. [2021-01-06 16:53:49,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-01-06 16:53:49,886 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:49,886 INFO L422 BasicCegarLoop]: trace histogram [70, 70, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:50,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 16:53:50,100 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:50,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:50,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1127563646, now seen corresponding path program 14 times [2021-01-06 16:53:50,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:50,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662674642] [2021-01-06 16:53:50,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:50,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:50,339 INFO L134 CoverageAnalysis]: Checked inductivity of 5390 backedges. 0 proven. 4690 refuted. 0 times theorem prover too weak. 700 trivial. 0 not checked. [2021-01-06 16:53:50,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662674642] [2021-01-06 16:53:50,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473200449] [2021-01-06 16:53:50,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:50,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:53:50,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:50,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 16:53:50,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:50,881 INFO L134 CoverageAnalysis]: Checked inductivity of 5390 backedges. 0 proven. 4690 refuted. 0 times theorem prover too weak. 700 trivial. 0 not checked. [2021-01-06 16:53:50,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:50,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-06 16:53:50,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286175363] [2021-01-06 16:53:50,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 16:53:50,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:50,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 16:53:50,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 16:53:50,884 INFO L87 Difference]: Start difference. First operand 170 states and 177 transitions. Second operand 19 states. [2021-01-06 16:53:50,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:50,963 INFO L93 Difference]: Finished difference Result 219 states and 228 transitions. [2021-01-06 16:53:50,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 16:53:50,964 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 169 [2021-01-06 16:53:50,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:50,966 INFO L225 Difference]: With dead ends: 219 [2021-01-06 16:53:50,966 INFO L226 Difference]: Without dead ends: 215 [2021-01-06 16:53:50,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 16:53:50,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-01-06 16:53:50,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 193. [2021-01-06 16:53:50,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2021-01-06 16:53:50,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 201 transitions. [2021-01-06 16:53:50,986 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 201 transitions. Word has length 169 [2021-01-06 16:53:50,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:50,987 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 201 transitions. [2021-01-06 16:53:50,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 16:53:50,987 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 201 transitions. [2021-01-06 16:53:50,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-01-06 16:53:50,990 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:50,990 INFO L422 BasicCegarLoop]: trace histogram [80, 80, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:51,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:51,204 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:51,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:51,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1903780258, now seen corresponding path program 15 times [2021-01-06 16:53:51,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:51,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936457300] [2021-01-06 16:53:51,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:51,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:51,589 INFO L134 CoverageAnalysis]: Checked inductivity of 7052 backedges. 0 proven. 6252 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2021-01-06 16:53:51,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936457300] [2021-01-06 16:53:51,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914569742] [2021-01-06 16:53:51,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:51,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 69 check-sat command(s) [2021-01-06 16:53:51,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:51,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 16:53:51,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:52,323 INFO L134 CoverageAnalysis]: Checked inductivity of 7052 backedges. 0 proven. 6252 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2021-01-06 16:53:52,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:52,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-06 16:53:52,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238223114] [2021-01-06 16:53:52,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 16:53:52,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:52,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 16:53:52,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 16:53:52,326 INFO L87 Difference]: Start difference. First operand 193 states and 201 transitions. Second operand 21 states. [2021-01-06 16:53:52,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:52,415 INFO L93 Difference]: Finished difference Result 242 states and 252 transitions. [2021-01-06 16:53:52,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 16:53:52,416 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 192 [2021-01-06 16:53:52,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:52,418 INFO L225 Difference]: With dead ends: 242 [2021-01-06 16:53:52,418 INFO L226 Difference]: Without dead ends: 238 [2021-01-06 16:53:52,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 16:53:52,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-01-06 16:53:52,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 216. [2021-01-06 16:53:52,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2021-01-06 16:53:52,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 225 transitions. [2021-01-06 16:53:52,441 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 225 transitions. Word has length 192 [2021-01-06 16:53:52,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:52,441 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 225 transitions. [2021-01-06 16:53:52,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 16:53:52,442 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 225 transitions. [2021-01-06 16:53:52,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-01-06 16:53:52,444 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:52,445 INFO L422 BasicCegarLoop]: trace histogram [90, 90, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:52,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 16:53:52,659 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:52,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:52,660 INFO L82 PathProgramCache]: Analyzing trace with hash 684377470, now seen corresponding path program 16 times [2021-01-06 16:53:52,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:52,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565763783] [2021-01-06 16:53:52,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:52,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:53,088 INFO L134 CoverageAnalysis]: Checked inductivity of 8937 backedges. 0 proven. 8037 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2021-01-06 16:53:53,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565763783] [2021-01-06 16:53:53,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980055887] [2021-01-06 16:53:53,089 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:53,255 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:53:53,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:53,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 16:53:53,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:53,823 INFO L134 CoverageAnalysis]: Checked inductivity of 8937 backedges. 0 proven. 8037 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2021-01-06 16:53:53,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:53,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-06 16:53:53,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632668486] [2021-01-06 16:53:53,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 16:53:53,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:53,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 16:53:53,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=298, Unknown=0, NotChecked=0, Total=506 [2021-01-06 16:53:53,825 INFO L87 Difference]: Start difference. First operand 216 states and 225 transitions. Second operand 23 states. [2021-01-06 16:53:53,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:53,948 INFO L93 Difference]: Finished difference Result 265 states and 276 transitions. [2021-01-06 16:53:53,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 16:53:53,948 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 215 [2021-01-06 16:53:53,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:53,951 INFO L225 Difference]: With dead ends: 265 [2021-01-06 16:53:53,951 INFO L226 Difference]: Without dead ends: 261 [2021-01-06 16:53:53,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=223, Invalid=329, Unknown=0, NotChecked=0, Total=552 [2021-01-06 16:53:53,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-01-06 16:53:53,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 239. [2021-01-06 16:53:53,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2021-01-06 16:53:53,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 249 transitions. [2021-01-06 16:53:53,979 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 249 transitions. Word has length 215 [2021-01-06 16:53:53,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:53,979 INFO L481 AbstractCegarLoop]: Abstraction has 239 states and 249 transitions. [2021-01-06 16:53:53,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 16:53:53,980 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 249 transitions. [2021-01-06 16:53:53,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-01-06 16:53:53,983 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:53,983 INFO L422 BasicCegarLoop]: trace histogram [100, 100, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:54,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 16:53:54,197 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:54,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:54,198 INFO L82 PathProgramCache]: Analyzing trace with hash -16999842, now seen corresponding path program 17 times [2021-01-06 16:53:54,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:54,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815139691] [2021-01-06 16:53:54,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:54,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:54:01,163 INFO L134 CoverageAnalysis]: Checked inductivity of 11045 backedges. 10917 proven. 119 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 16:54:01,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815139691] [2021-01-06 16:54:01,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446890028] [2021-01-06 16:54:01,164 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:54:01,440 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 81 check-sat command(s) [2021-01-06 16:54:01,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:54:01,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 104 conjunts are in the unsatisfiable core [2021-01-06 16:54:01,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:54:01,937 INFO L134 CoverageAnalysis]: Checked inductivity of 11045 backedges. 11036 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 16:54:01,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 16:54:01,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [104] total 106 [2021-01-06 16:54:01,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876438236] [2021-01-06 16:54:01,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 104 states [2021-01-06 16:54:01,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:54:01,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-01-06 16:54:01,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5261, Invalid=5869, Unknown=0, NotChecked=0, Total=11130 [2021-01-06 16:54:01,947 INFO L87 Difference]: Start difference. First operand 239 states and 249 transitions. Second operand 104 states. [2021-01-06 16:54:03,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:54:03,435 INFO L93 Difference]: Finished difference Result 9779 states and 10239 transitions. [2021-01-06 16:54:03,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-01-06 16:54:03,435 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 238 [2021-01-06 16:54:03,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:54:03,437 INFO L225 Difference]: With dead ends: 9779 [2021-01-06 16:54:03,437 INFO L226 Difference]: Without dead ends: 0 [2021-01-06 16:54:03,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=5366, Invalid=5976, Unknown=0, NotChecked=0, Total=11342 [2021-01-06 16:54:03,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-01-06 16:54:03,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-01-06 16:54:03,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-01-06 16:54:03,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-01-06 16:54:03,455 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 238 [2021-01-06 16:54:03,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:54:03,455 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-01-06 16:54:03,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 104 states. [2021-01-06 16:54:03,456 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-01-06 16:54:03,456 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-01-06 16:54:03,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:54:03,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-01-06 16:54:06,515 WARN L197 SmtUtils]: Spent 2.82 s on a formula simplification. DAG size of input: 672 DAG size of output: 663 [2021-01-06 16:55:36,347 WARN L197 SmtUtils]: Spent 1.50 m on a formula simplification. DAG size of input: 5172 DAG size of output: 1950 [2021-01-06 16:55:47,716 WARN L197 SmtUtils]: Spent 11.35 s on a formula simplification. DAG size of input: 663 DAG size of output: 59