/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/recursive-simple/id_i25_o25-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 19:20:32,056 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 19:20:32,060 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 19:20:32,102 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 19:20:32,103 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 19:20:32,104 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 19:20:32,106 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 19:20:32,109 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 19:20:32,128 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 19:20:32,129 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 19:20:32,131 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 19:20:32,137 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 19:20:32,137 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 19:20:32,143 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 19:20:32,146 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 19:20:32,149 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 19:20:32,151 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 19:20:32,159 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 19:20:32,165 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 19:20:32,177 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 19:20:32,184 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 19:20:32,188 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 19:20:32,190 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 19:20:32,192 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 19:20:32,200 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 19:20:32,213 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 19:20:32,214 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 19:20:32,216 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 19:20:32,217 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 19:20:32,219 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 19:20:32,219 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 19:20:32,220 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 19:20:32,228 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 19:20:32,229 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 19:20:32,230 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 19:20:32,231 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 19:20:32,233 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 19:20:32,294 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 19:20:32,295 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 19:20:32,299 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 19:20:32,300 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 19:20:32,300 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 19:20:32,301 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 19:20:32,301 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 19:20:32,301 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 19:20:32,301 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 19:20:32,302 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 19:20:32,303 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 19:20:32,303 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 19:20:32,304 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 19:20:32,304 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 19:20:32,305 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 19:20:32,305 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 19:20:32,305 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 19:20:32,306 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 19:20:32,306 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 19:20:32,306 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 19:20:32,307 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 19:20:32,307 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 19:20:32,307 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 19:20:32,307 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 19:20:32,308 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 19:20:32,308 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 19:20:32,754 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 19:20:32,784 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 19:20:32,787 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 19:20:32,788 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 19:20:32,789 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 19:20:32,790 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/id_i25_o25-2.c [2021-01-06 19:20:32,882 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/f8674acbb/3e8a0c60c85a42e89a352b8c7b63b4eb/FLAGcd2083c26 [2021-01-06 19:20:33,552 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 19:20:33,553 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_i25_o25-2.c [2021-01-06 19:20:33,561 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/f8674acbb/3e8a0c60c85a42e89a352b8c7b63b4eb/FLAGcd2083c26 [2021-01-06 19:20:33,917 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/f8674acbb/3e8a0c60c85a42e89a352b8c7b63b4eb [2021-01-06 19:20:33,920 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 19:20:33,923 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 19:20:33,925 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 19:20:33,925 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 19:20:33,929 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 19:20:33,930 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 07:20:33" (1/1) ... [2021-01-06 19:20:33,931 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41aa7c6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:33, skipping insertion in model container [2021-01-06 19:20:33,932 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 07:20:33" (1/1) ... [2021-01-06 19:20:33,942 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 19:20:33,958 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 19:20:34,202 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/recursive-simple/id_i25_o25-2.c[454,467] [2021-01-06 19:20:34,207 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 19:20:34,222 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 19:20:34,241 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/recursive-simple/id_i25_o25-2.c[454,467] [2021-01-06 19:20:34,242 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 19:20:34,259 INFO L208 MainTranslator]: Completed translation [2021-01-06 19:20:34,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:34 WrapperNode [2021-01-06 19:20:34,261 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 19:20:34,263 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 19:20:34,263 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 19:20:34,263 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 19:20:34,272 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:34" (1/1) ... [2021-01-06 19:20:34,279 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:34" (1/1) ... [2021-01-06 19:20:34,297 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 19:20:34,299 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 19:20:34,299 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 19:20:34,299 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 19:20:34,308 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:34" (1/1) ... [2021-01-06 19:20:34,309 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:34" (1/1) ... [2021-01-06 19:20:34,310 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:34" (1/1) ... [2021-01-06 19:20:34,310 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:34" (1/1) ... [2021-01-06 19:20:34,313 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:34" (1/1) ... [2021-01-06 19:20:34,315 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:34" (1/1) ... [2021-01-06 19:20:34,316 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:34" (1/1) ... [2021-01-06 19:20:34,318 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 19:20:34,319 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 19:20:34,319 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 19:20:34,319 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 19:20:34,320 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:34" (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 19:20:34,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 19:20:34,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 19:20:34,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 19:20:34,419 INFO L130 BoogieDeclarations]: Found specification of procedure id [2021-01-06 19:20:34,419 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2021-01-06 19:20:34,419 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 19:20:34,680 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 19:20:34,681 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-01-06 19:20:34,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 07:20:34 BoogieIcfgContainer [2021-01-06 19:20:34,683 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 19:20:34,697 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 19:20:34,700 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 19:20:34,709 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 19:20:34,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 07:20:33" (1/3) ... [2021-01-06 19:20:34,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63458959 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 07:20:34, skipping insertion in model container [2021-01-06 19:20:34,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:34" (2/3) ... [2021-01-06 19:20:34,720 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63458959 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 07:20:34, skipping insertion in model container [2021-01-06 19:20:34,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 07:20:34" (3/3) ... [2021-01-06 19:20:34,723 INFO L111 eAbstractionObserver]: Analyzing ICFG id_i25_o25-2.c [2021-01-06 19:20:34,745 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 19:20:34,759 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 19:20:34,798 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 19:20:34,854 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 19:20:34,855 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 19:20:34,855 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 19:20:34,855 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 19:20:34,855 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 19:20:34,855 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 19:20:34,855 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 19:20:34,856 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 19:20:34,876 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2021-01-06 19:20:34,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 19:20:34,883 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:34,883 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:34,910 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:34,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:34,928 INFO L82 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2021-01-06 19:20:34,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:34,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398345005] [2021-01-06 19:20:34,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:35,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:35,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:35,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:35,222 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 19:20:35,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398345005] [2021-01-06 19:20:35,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:20:35,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:20:35,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185624577] [2021-01-06 19:20:35,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 19:20:35,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:35,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 19:20:35,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:20:35,255 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 5 states. [2021-01-06 19:20:35,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:35,308 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2021-01-06 19:20:35,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 19:20:35,312 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2021-01-06 19:20:35,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:35,326 INFO L225 Difference]: With dead ends: 28 [2021-01-06 19:20:35,327 INFO L226 Difference]: Without dead ends: 15 [2021-01-06 19:20:35,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:20:35,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-01-06 19:20:35,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-01-06 19:20:35,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-01-06 19:20:35,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-01-06 19:20:35,390 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2021-01-06 19:20:35,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:35,391 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-01-06 19:20:35,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 19:20:35,392 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-01-06 19:20:35,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 19:20:35,395 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:35,396 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:35,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 19:20:35,398 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:35,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:35,399 INFO L82 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2021-01-06 19:20:35,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:35,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110816509] [2021-01-06 19:20:35,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:35,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:35,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:35,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:35,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:35,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:35,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 19:20:35,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110816509] [2021-01-06 19:20:35,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205185615] [2021-01-06 19:20:35,632 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 19:20:35,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:35,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 19:20:35,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:35,825 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 19:20:35,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:35,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-01-06 19:20:35,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814226348] [2021-01-06 19:20:35,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 19:20:35,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:35,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 19:20:35,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-01-06 19:20:35,830 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2021-01-06 19:20:35,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:35,888 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2021-01-06 19:20:35,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 19:20:35,889 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2021-01-06 19:20:35,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:35,890 INFO L225 Difference]: With dead ends: 22 [2021-01-06 19:20:35,890 INFO L226 Difference]: Without dead ends: 18 [2021-01-06 19:20:35,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-01-06 19:20:35,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-01-06 19:20:35,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-01-06 19:20:35,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-01-06 19:20:35,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-01-06 19:20:35,898 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2021-01-06 19:20:35,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:35,898 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-01-06 19:20:35,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 19:20:35,899 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-01-06 19:20:35,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 19:20:35,900 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:35,900 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:36,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 19:20:36,117 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:36,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:36,120 INFO L82 PathProgramCache]: Analyzing trace with hash -41010676, now seen corresponding path program 2 times [2021-01-06 19:20:36,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:36,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143165959] [2021-01-06 19:20:36,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:36,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:36,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:36,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:36,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:36,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:36,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:36,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:36,298 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 19:20:36,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143165959] [2021-01-06 19:20:36,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657827458] [2021-01-06 19:20:36,300 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 19:20:36,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 19:20:36,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:20:36,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 19:20:36,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:36,438 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 19:20:36,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:36,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-01-06 19:20:36,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278364669] [2021-01-06 19:20:36,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 19:20:36,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:36,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 19:20:36,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-01-06 19:20:36,442 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 9 states. [2021-01-06 19:20:36,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:36,502 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2021-01-06 19:20:36,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 19:20:36,503 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2021-01-06 19:20:36,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:36,505 INFO L225 Difference]: With dead ends: 25 [2021-01-06 19:20:36,505 INFO L226 Difference]: Without dead ends: 21 [2021-01-06 19:20:36,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-01-06 19:20:36,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-01-06 19:20:36,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-01-06 19:20:36,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-01-06 19:20:36,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-01-06 19:20:36,514 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2021-01-06 19:20:36,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:36,514 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-01-06 19:20:36,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 19:20:36,514 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-01-06 19:20:36,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 19:20:36,516 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:36,516 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:36,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:20:36,731 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:36,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:36,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 3 times [2021-01-06 19:20:36,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:36,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959685961] [2021-01-06 19:20:36,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:36,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:36,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:36,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:36,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:36,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:36,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:36,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:36,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:36,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:36,981 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-01-06 19:20:36,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959685961] [2021-01-06 19:20:36,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141289683] [2021-01-06 19:20:36,982 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 19:20:37,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 19:20:37,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:20:37,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 19:20:37,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:37,212 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-01-06 19:20:37,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:37,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-01-06 19:20:37,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682108570] [2021-01-06 19:20:37,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 19:20:37,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:37,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 19:20:37,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-01-06 19:20:37,216 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 17 states. [2021-01-06 19:20:37,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:37,380 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-01-06 19:20:37,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 19:20:37,381 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 28 [2021-01-06 19:20:37,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:37,384 INFO L225 Difference]: With dead ends: 28 [2021-01-06 19:20:37,384 INFO L226 Difference]: Without dead ends: 24 [2021-01-06 19:20:37,385 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-01-06 19:20:37,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-01-06 19:20:37,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-01-06 19:20:37,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 19:20:37,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-01-06 19:20:37,402 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2021-01-06 19:20:37,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:37,403 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-01-06 19:20:37,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 19:20:37,403 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-01-06 19:20:37,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 19:20:37,407 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:37,407 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:37,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:20:37,623 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:37,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:37,625 INFO L82 PathProgramCache]: Analyzing trace with hash 371264716, now seen corresponding path program 4 times [2021-01-06 19:20:37,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:37,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733535310] [2021-01-06 19:20:37,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:37,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:37,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:37,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:37,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:37,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:37,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:37,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:37,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:37,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:37,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:37,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:37,884 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-01-06 19:20:37,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733535310] [2021-01-06 19:20:37,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699309717] [2021-01-06 19:20:37,885 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 19:20:37,938 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 19:20:37,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:20:37,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 19:20:37,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:38,053 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-01-06 19:20:38,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:38,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-01-06 19:20:38,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025206028] [2021-01-06 19:20:38,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 19:20:38,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:38,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 19:20:38,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-01-06 19:20:38,057 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 11 states. [2021-01-06 19:20:38,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:38,142 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2021-01-06 19:20:38,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 19:20:38,143 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2021-01-06 19:20:38,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:38,145 INFO L225 Difference]: With dead ends: 31 [2021-01-06 19:20:38,145 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 19:20:38,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-01-06 19:20:38,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 19:20:38,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-01-06 19:20:38,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 19:20:38,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-01-06 19:20:38,152 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2021-01-06 19:20:38,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:38,153 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-01-06 19:20:38,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 19:20:38,153 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-01-06 19:20:38,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 19:20:38,155 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:38,155 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:38,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:20:38,369 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:38,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:38,371 INFO L82 PathProgramCache]: Analyzing trace with hash -886339242, now seen corresponding path program 5 times [2021-01-06 19:20:38,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:38,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713709425] [2021-01-06 19:20:38,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:38,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:38,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:38,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:38,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:38,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:38,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:38,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:38,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:38,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:38,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:38,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:38,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:38,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:38,537 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-01-06 19:20:38,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713709425] [2021-01-06 19:20:38,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137232151] [2021-01-06 19:20:38,538 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 19:20:38,590 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 19:20:38,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:20:38,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 19:20:38,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:38,685 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-01-06 19:20:38,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:38,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-01-06 19:20:38,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300647288] [2021-01-06 19:20:38,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 19:20:38,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:38,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 19:20:38,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-01-06 19:20:38,688 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 12 states. [2021-01-06 19:20:38,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:38,775 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2021-01-06 19:20:38,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 19:20:38,776 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2021-01-06 19:20:38,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:38,778 INFO L225 Difference]: With dead ends: 34 [2021-01-06 19:20:38,778 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 19:20:38,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-01-06 19:20:38,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 19:20:38,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-01-06 19:20:38,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 19:20:38,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-01-06 19:20:38,785 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2021-01-06 19:20:38,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:38,785 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-01-06 19:20:38,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 19:20:38,786 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-01-06 19:20:38,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 19:20:38,787 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:38,787 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:39,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 19:20:39,002 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:39,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:39,003 INFO L82 PathProgramCache]: Analyzing trace with hash -918712436, now seen corresponding path program 6 times [2021-01-06 19:20:39,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:39,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258742452] [2021-01-06 19:20:39,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:39,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:39,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:39,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:39,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:39,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:39,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:39,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:39,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:39,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:39,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:39,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:39,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:39,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:39,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:39,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:39,267 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-01-06 19:20:39,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258742452] [2021-01-06 19:20:39,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935980109] [2021-01-06 19:20:39,268 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 19:20:39,330 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 19:20:39,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:20:39,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 19:20:39,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:39,626 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-01-06 19:20:39,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:39,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 26 [2021-01-06 19:20:39,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741906471] [2021-01-06 19:20:39,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 19:20:39,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:39,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 19:20:39,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-01-06 19:20:39,630 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 26 states. [2021-01-06 19:20:40,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:40,005 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2021-01-06 19:20:40,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 19:20:40,006 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 46 [2021-01-06 19:20:40,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:40,007 INFO L225 Difference]: With dead ends: 37 [2021-01-06 19:20:40,007 INFO L226 Difference]: Without dead ends: 33 [2021-01-06 19:20:40,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=279, Invalid=1203, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 19:20:40,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-01-06 19:20:40,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-01-06 19:20:40,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 19:20:40,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-01-06 19:20:40,015 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2021-01-06 19:20:40,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:40,016 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-01-06 19:20:40,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 19:20:40,016 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-01-06 19:20:40,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-01-06 19:20:40,017 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:40,018 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:40,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:20:40,232 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:40,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:40,233 INFO L82 PathProgramCache]: Analyzing trace with hash -626238314, now seen corresponding path program 7 times [2021-01-06 19:20:40,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:40,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037373967] [2021-01-06 19:20:40,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:40,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:40,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:40,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:40,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:40,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:40,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:40,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:40,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:40,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:40,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:40,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:40,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:40,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:40,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:40,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:40,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:40,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:40,537 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-01-06 19:20:40,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037373967] [2021-01-06 19:20:40,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088532052] [2021-01-06 19:20:40,538 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 19:20:40,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:40,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 19:20:40,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:40,712 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-01-06 19:20:40,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:40,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-01-06 19:20:40,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461626113] [2021-01-06 19:20:40,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 19:20:40,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:40,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 19:20:40,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-01-06 19:20:40,715 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 14 states. [2021-01-06 19:20:40,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:40,837 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2021-01-06 19:20:40,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 19:20:40,838 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2021-01-06 19:20:40,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:40,839 INFO L225 Difference]: With dead ends: 40 [2021-01-06 19:20:40,840 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 19:20:40,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2021-01-06 19:20:40,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 19:20:40,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-01-06 19:20:40,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-01-06 19:20:40,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-01-06 19:20:40,847 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2021-01-06 19:20:40,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:40,847 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-01-06 19:20:40,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 19:20:40,848 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-01-06 19:20:40,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-06 19:20:40,849 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:40,849 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:41,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:20:41,060 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:41,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:41,061 INFO L82 PathProgramCache]: Analyzing trace with hash -960511412, now seen corresponding path program 8 times [2021-01-06 19:20:41,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:41,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314655817] [2021-01-06 19:20:41,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:41,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:41,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:41,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:41,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:41,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:41,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:41,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:41,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:41,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:41,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:41,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:41,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:41,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:41,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:41,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:41,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:41,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:41,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:41,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:41,328 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 19:20:41,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314655817] [2021-01-06 19:20:41,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244307317] [2021-01-06 19:20:41,329 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 19:20:41,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 19:20:41,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:20:41,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 19:20:41,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:41,509 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 19:20:41,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:41,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-01-06 19:20:41,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066152266] [2021-01-06 19:20:41,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 19:20:41,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:41,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 19:20:41,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-01-06 19:20:41,512 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 15 states. [2021-01-06 19:20:41,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:41,642 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2021-01-06 19:20:41,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 19:20:41,643 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 58 [2021-01-06 19:20:41,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:41,644 INFO L225 Difference]: With dead ends: 43 [2021-01-06 19:20:41,644 INFO L226 Difference]: Without dead ends: 39 [2021-01-06 19:20:41,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2021-01-06 19:20:41,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-01-06 19:20:41,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-01-06 19:20:41,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 19:20:41,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-01-06 19:20:41,652 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 58 [2021-01-06 19:20:41,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:41,652 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-01-06 19:20:41,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 19:20:41,653 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-01-06 19:20:41,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-01-06 19:20:41,654 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:41,654 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:41,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 19:20:41,869 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:41,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:41,871 INFO L82 PathProgramCache]: Analyzing trace with hash -366706730, now seen corresponding path program 9 times [2021-01-06 19:20:41,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:41,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096773809] [2021-01-06 19:20:41,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:41,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:41,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:41,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:41,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:41,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:41,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:41,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:41,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:42,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:42,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:42,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:42,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:42,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:42,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:42,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:42,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:42,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:42,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:42,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:42,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:42,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:42,168 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-01-06 19:20:42,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096773809] [2021-01-06 19:20:42,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517881762] [2021-01-06 19:20:42,169 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 19:20:42,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-01-06 19:20:42,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:20:42,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 19:20:42,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:42,705 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-01-06 19:20:42,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:42,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 35 [2021-01-06 19:20:42,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118676622] [2021-01-06 19:20:42,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-01-06 19:20:42,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:42,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-01-06 19:20:42,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=997, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 19:20:42,709 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 35 states. [2021-01-06 19:20:43,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:43,224 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2021-01-06 19:20:43,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 19:20:43,225 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 64 [2021-01-06 19:20:43,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:43,226 INFO L225 Difference]: With dead ends: 46 [2021-01-06 19:20:43,226 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 19:20:43,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=531, Invalid=2331, Unknown=0, NotChecked=0, Total=2862 [2021-01-06 19:20:43,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 19:20:43,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-01-06 19:20:43,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-01-06 19:20:43,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-01-06 19:20:43,235 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 64 [2021-01-06 19:20:43,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:43,235 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-01-06 19:20:43,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2021-01-06 19:20:43,235 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-01-06 19:20:43,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-01-06 19:20:43,237 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:43,237 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:43,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:20:43,451 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:43,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:43,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1719425780, now seen corresponding path program 10 times [2021-01-06 19:20:43,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:43,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978151311] [2021-01-06 19:20:43,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:43,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:43,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:43,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:43,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:43,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:43,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:43,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:43,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:43,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:43,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:43,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:43,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:43,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:43,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:43,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:43,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:43,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:43,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:43,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:43,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:43,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:43,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:43,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:43,824 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-01-06 19:20:43,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978151311] [2021-01-06 19:20:43,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440841573] [2021-01-06 19:20:43,825 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 19:20:43,894 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 19:20:43,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:20:43,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 19:20:43,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:44,057 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-01-06 19:20:44,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:44,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-01-06 19:20:44,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864638400] [2021-01-06 19:20:44,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 19:20:44,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:44,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 19:20:44,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-01-06 19:20:44,060 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 17 states. [2021-01-06 19:20:44,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:44,221 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2021-01-06 19:20:44,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 19:20:44,222 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 70 [2021-01-06 19:20:44,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:44,224 INFO L225 Difference]: With dead ends: 49 [2021-01-06 19:20:44,224 INFO L226 Difference]: Without dead ends: 45 [2021-01-06 19:20:44,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=264, Invalid=492, Unknown=0, NotChecked=0, Total=756 [2021-01-06 19:20:44,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-01-06 19:20:44,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-01-06 19:20:44,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-01-06 19:20:44,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-01-06 19:20:44,231 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 70 [2021-01-06 19:20:44,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:44,231 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-01-06 19:20:44,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 19:20:44,232 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-01-06 19:20:44,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-06 19:20:44,233 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:44,233 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:44,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:20:44,447 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:44,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:44,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1354232598, now seen corresponding path program 11 times [2021-01-06 19:20:44,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:44,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195870479] [2021-01-06 19:20:44,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:44,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:44,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:44,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:44,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:44,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:44,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:44,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:44,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:44,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:44,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:44,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:44,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:44,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:44,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:44,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:44,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:44,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:44,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:44,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:44,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:44,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:44,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:44,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:44,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:44,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:44,897 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-01-06 19:20:44,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195870479] [2021-01-06 19:20:44,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781448997] [2021-01-06 19:20:44,898 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 19:20:44,961 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-01-06 19:20:44,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:20:44,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 19:20:44,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:45,149 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-01-06 19:20:45,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:45,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-01-06 19:20:45,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368771988] [2021-01-06 19:20:45,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 19:20:45,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:45,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 19:20:45,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-01-06 19:20:45,152 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 18 states. [2021-01-06 19:20:45,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:45,342 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2021-01-06 19:20:45,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 19:20:45,342 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 76 [2021-01-06 19:20:45,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:45,344 INFO L225 Difference]: With dead ends: 52 [2021-01-06 19:20:45,344 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 19:20:45,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=305, Invalid=565, Unknown=0, NotChecked=0, Total=870 [2021-01-06 19:20:45,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 19:20:45,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-01-06 19:20:45,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-01-06 19:20:45,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-01-06 19:20:45,352 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 76 [2021-01-06 19:20:45,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:45,352 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-01-06 19:20:45,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 19:20:45,352 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-01-06 19:20:45,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-01-06 19:20:45,354 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:45,354 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:45,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 19:20:45,569 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:45,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:45,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1734686668, now seen corresponding path program 12 times [2021-01-06 19:20:45,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:45,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853865785] [2021-01-06 19:20:45,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:45,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:45,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:45,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:45,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:45,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:45,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:45,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:45,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:45,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:45,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:45,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:45,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:45,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:45,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:45,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:45,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:45,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:45,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:45,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:45,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:45,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:45,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:45,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:45,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:45,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:45,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:45,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:46,053 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-01-06 19:20:46,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853865785] [2021-01-06 19:20:46,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16211525] [2021-01-06 19:20:46,054 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 19:20:46,165 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-01-06 19:20:46,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:20:46,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 19:20:46,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:46,321 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-01-06 19:20:46,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:46,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-01-06 19:20:46,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89130583] [2021-01-06 19:20:46,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 19:20:46,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:46,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 19:20:46,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-01-06 19:20:46,324 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 19 states. [2021-01-06 19:20:46,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:46,565 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2021-01-06 19:20:46,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 19:20:46,566 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 82 [2021-01-06 19:20:46,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:46,572 INFO L225 Difference]: With dead ends: 55 [2021-01-06 19:20:46,572 INFO L226 Difference]: Without dead ends: 51 [2021-01-06 19:20:46,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=349, Invalid=643, Unknown=0, NotChecked=0, Total=992 [2021-01-06 19:20:46,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-01-06 19:20:46,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-01-06 19:20:46,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-01-06 19:20:46,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2021-01-06 19:20:46,580 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 82 [2021-01-06 19:20:46,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:46,580 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2021-01-06 19:20:46,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 19:20:46,581 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2021-01-06 19:20:46,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-01-06 19:20:46,582 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:46,582 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:46,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 19:20:46,796 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:46,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:46,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1433749930, now seen corresponding path program 13 times [2021-01-06 19:20:46,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:46,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507649305] [2021-01-06 19:20:46,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:46,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:46,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:46,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:46,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:46,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:46,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:46,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:46,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:46,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:46,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:46,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:47,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:47,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:47,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:47,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:47,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:47,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:47,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:47,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:47,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:47,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:47,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:47,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:47,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:47,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:47,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:47,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:47,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:47,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:47,325 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-01-06 19:20:47,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507649305] [2021-01-06 19:20:47,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101002525] [2021-01-06 19:20:47,326 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 19:20:47,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:47,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 30 conjunts are in the unsatisfiable core [2021-01-06 19:20:47,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:47,547 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-01-06 19:20:47,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:47,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-01-06 19:20:47,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683490722] [2021-01-06 19:20:47,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 19:20:47,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:47,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 19:20:47,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-01-06 19:20:47,550 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 20 states. [2021-01-06 19:20:47,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:47,750 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2021-01-06 19:20:47,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 19:20:47,751 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 88 [2021-01-06 19:20:47,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:47,752 INFO L225 Difference]: With dead ends: 58 [2021-01-06 19:20:47,752 INFO L226 Difference]: Without dead ends: 54 [2021-01-06 19:20:47,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=396, Invalid=726, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 19:20:47,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-01-06 19:20:47,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-01-06 19:20:47,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-06 19:20:47,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2021-01-06 19:20:47,763 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 88 [2021-01-06 19:20:47,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:47,764 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2021-01-06 19:20:47,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 19:20:47,764 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2021-01-06 19:20:47,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-01-06 19:20:47,766 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:47,767 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:47,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 19:20:47,981 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:47,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:47,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1321174388, now seen corresponding path program 14 times [2021-01-06 19:20:47,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:47,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035020707] [2021-01-06 19:20:47,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:48,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:48,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:48,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:48,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:48,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:48,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:48,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:48,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:48,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:48,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:48,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:48,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:48,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:48,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:48,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:48,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:48,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:48,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:48,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:48,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:48,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:48,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:48,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:48,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:48,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:48,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:48,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:48,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:48,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:48,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:48,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:48,576 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-01-06 19:20:48,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035020707] [2021-01-06 19:20:48,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456078748] [2021-01-06 19:20:48,577 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 19:20:48,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 19:20:48,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:20:48,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 32 conjunts are in the unsatisfiable core [2021-01-06 19:20:48,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:48,915 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-01-06 19:20:48,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:48,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-01-06 19:20:48,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079706033] [2021-01-06 19:20:48,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 19:20:48,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:48,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 19:20:48,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2021-01-06 19:20:48,917 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 21 states. [2021-01-06 19:20:49,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:49,169 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2021-01-06 19:20:49,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 19:20:49,169 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 94 [2021-01-06 19:20:49,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:49,170 INFO L225 Difference]: With dead ends: 61 [2021-01-06 19:20:49,171 INFO L226 Difference]: Without dead ends: 57 [2021-01-06 19:20:49,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=446, Invalid=814, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 19:20:49,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-01-06 19:20:49,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-01-06 19:20:49,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-01-06 19:20:49,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2021-01-06 19:20:49,192 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 94 [2021-01-06 19:20:49,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:49,192 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2021-01-06 19:20:49,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 19:20:49,193 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2021-01-06 19:20:49,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-01-06 19:20:49,199 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:49,199 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:49,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:20:49,415 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:49,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:49,416 INFO L82 PathProgramCache]: Analyzing trace with hash 415287702, now seen corresponding path program 15 times [2021-01-06 19:20:49,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:49,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140305350] [2021-01-06 19:20:49,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:49,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:49,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:49,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:49,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:49,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:49,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:49,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:49,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:49,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:49,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:49,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:49,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:49,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:49,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:49,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:49,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:49,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:49,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:49,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:49,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:49,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:49,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:49,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:49,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:49,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:49,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:49,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:49,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:49,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:49,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:49,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:49,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:49,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:50,045 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2021-01-06 19:20:50,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140305350] [2021-01-06 19:20:50,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484316463] [2021-01-06 19:20:50,045 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 19:20:50,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-01-06 19:20:50,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:20:50,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 34 conjunts are in the unsatisfiable core [2021-01-06 19:20:50,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:50,331 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2021-01-06 19:20:50,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:50,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-01-06 19:20:50,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52975299] [2021-01-06 19:20:50,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 19:20:50,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:50,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 19:20:50,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2021-01-06 19:20:50,333 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 22 states. [2021-01-06 19:20:50,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:50,584 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2021-01-06 19:20:50,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 19:20:50,585 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 100 [2021-01-06 19:20:50,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:50,586 INFO L225 Difference]: With dead ends: 64 [2021-01-06 19:20:50,586 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 19:20:50,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=499, Invalid=907, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 19:20:50,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 19:20:50,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-01-06 19:20:50,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-01-06 19:20:50,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2021-01-06 19:20:50,600 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 100 [2021-01-06 19:20:50,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:50,600 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2021-01-06 19:20:50,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 19:20:50,600 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2021-01-06 19:20:50,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-01-06 19:20:50,603 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:50,603 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:50,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 19:20:50,817 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:50,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:50,818 INFO L82 PathProgramCache]: Analyzing trace with hash 317812044, now seen corresponding path program 16 times [2021-01-06 19:20:50,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:50,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878320592] [2021-01-06 19:20:50,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:50,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:50,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:50,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:50,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:50,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:50,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:50,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:50,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:50,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:51,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:51,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:51,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:51,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:51,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:51,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:51,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:51,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:51,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:51,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:51,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:51,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:51,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:51,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:51,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:51,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:51,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:51,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:51,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:51,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:51,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:51,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:51,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:51,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:51,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:51,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:51,461 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-01-06 19:20:51,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878320592] [2021-01-06 19:20:51,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910372674] [2021-01-06 19:20:51,462 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 19:20:51,536 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 19:20:51,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:20:51,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 19:20:51,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:51,742 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-01-06 19:20:51,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:51,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-01-06 19:20:51,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415755816] [2021-01-06 19:20:51,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 19:20:51,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:51,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 19:20:51,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2021-01-06 19:20:51,751 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 23 states. [2021-01-06 19:20:52,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:52,004 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2021-01-06 19:20:52,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 19:20:52,005 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 106 [2021-01-06 19:20:52,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:52,007 INFO L225 Difference]: With dead ends: 67 [2021-01-06 19:20:52,007 INFO L226 Difference]: Without dead ends: 63 [2021-01-06 19:20:52,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=555, Invalid=1005, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 19:20:52,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-01-06 19:20:52,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-01-06 19:20:52,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-01-06 19:20:52,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2021-01-06 19:20:52,017 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 106 [2021-01-06 19:20:52,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:52,021 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2021-01-06 19:20:52,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 19:20:52,021 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2021-01-06 19:20:52,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-01-06 19:20:52,023 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:52,023 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:52,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 19:20:52,238 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:52,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:52,239 INFO L82 PathProgramCache]: Analyzing trace with hash -2122437418, now seen corresponding path program 17 times [2021-01-06 19:20:52,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:52,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431459945] [2021-01-06 19:20:52,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:52,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:52,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:52,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:52,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:52,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:52,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:52,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:52,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:52,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:52,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:52,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:52,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:52,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:52,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:52,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:52,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:52,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:52,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:52,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:52,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:52,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:52,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:52,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:52,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:52,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:52,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:52,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:52,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:52,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:52,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:52,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:52,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:52,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:52,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:52,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:52,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:52,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:52,929 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-01-06 19:20:52,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431459945] [2021-01-06 19:20:52,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861754969] [2021-01-06 19:20:52,930 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 19:20:53,023 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-01-06 19:20:53,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:20:53,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 38 conjunts are in the unsatisfiable core [2021-01-06 19:20:53,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:53,215 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-01-06 19:20:53,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:53,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-01-06 19:20:53,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094296683] [2021-01-06 19:20:53,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 19:20:53,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:53,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 19:20:53,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=335, Unknown=0, NotChecked=0, Total=552 [2021-01-06 19:20:53,217 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 24 states. [2021-01-06 19:20:53,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:53,528 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2021-01-06 19:20:53,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 19:20:53,529 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 112 [2021-01-06 19:20:53,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:53,530 INFO L225 Difference]: With dead ends: 70 [2021-01-06 19:20:53,530 INFO L226 Difference]: Without dead ends: 66 [2021-01-06 19:20:53,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=614, Invalid=1108, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 19:20:53,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-01-06 19:20:53,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-01-06 19:20:53,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-01-06 19:20:53,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2021-01-06 19:20:53,536 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 112 [2021-01-06 19:20:53,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:53,537 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2021-01-06 19:20:53,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 19:20:53,537 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2021-01-06 19:20:53,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-01-06 19:20:53,538 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:53,539 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:53,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 19:20:53,754 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:53,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:53,755 INFO L82 PathProgramCache]: Analyzing trace with hash 55840780, now seen corresponding path program 18 times [2021-01-06 19:20:53,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:53,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561440891] [2021-01-06 19:20:53,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:53,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:53,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:53,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:53,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:53,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:53,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:53,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:53,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:53,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:53,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:53,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:54,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:54,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:54,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:54,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:54,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:54,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:54,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:54,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:54,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:54,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:54,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:54,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:54,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:54,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:54,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:54,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:54,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:54,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:54,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:54,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:54,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:54,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:54,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:54,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:54,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:54,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:54,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:54,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:54,555 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2021-01-06 19:20:54,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561440891] [2021-01-06 19:20:54,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126038424] [2021-01-06 19:20:54,556 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:20:54,667 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-01-06 19:20:54,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:20:54,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 40 conjunts are in the unsatisfiable core [2021-01-06 19:20:54,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:56,006 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2021-01-06 19:20:56,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:56,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 41] total 62 [2021-01-06 19:20:56,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148674056] [2021-01-06 19:20:56,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-01-06 19:20:56,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:56,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-01-06 19:20:56,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=616, Invalid=3166, Unknown=0, NotChecked=0, Total=3782 [2021-01-06 19:20:56,012 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 62 states. [2021-01-06 19:20:57,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:57,439 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2021-01-06 19:20:57,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-06 19:20:57,439 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 118 [2021-01-06 19:20:57,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:57,441 INFO L225 Difference]: With dead ends: 73 [2021-01-06 19:20:57,441 INFO L226 Difference]: Without dead ends: 69 [2021-01-06 19:20:57,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2050 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1773, Invalid=7929, Unknown=0, NotChecked=0, Total=9702 [2021-01-06 19:20:57,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-01-06 19:20:57,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-01-06 19:20:57,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2021-01-06 19:20:57,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2021-01-06 19:20:57,451 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 118 [2021-01-06 19:20:57,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:57,452 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2021-01-06 19:20:57,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2021-01-06 19:20:57,452 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2021-01-06 19:20:57,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-01-06 19:20:57,453 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:57,453 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:57,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:20:57,667 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:57,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:57,667 INFO L82 PathProgramCache]: Analyzing trace with hash -806952938, now seen corresponding path program 19 times [2021-01-06 19:20:57,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:57,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802533458] [2021-01-06 19:20:57,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:57,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:57,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:57,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:57,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:57,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:57,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:57,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:57,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:57,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:57,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:57,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:57,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:57,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:57,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:57,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:57,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:57,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:58,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:58,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:58,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:58,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:58,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:58,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:58,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:58,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:58,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:58,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:58,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:58,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:58,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:58,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:58,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:58,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:58,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:58,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:58,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:58,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:58,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:58,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:58,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:58,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:58,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2021-01-06 19:20:58,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802533458] [2021-01-06 19:20:58,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137214993] [2021-01-06 19:20:58,586 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:20:58,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:58,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 42 conjunts are in the unsatisfiable core [2021-01-06 19:20:58,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:58,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2021-01-06 19:20:58,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:58,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2021-01-06 19:20:58,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545110576] [2021-01-06 19:20:58,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 19:20:58,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:58,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 19:20:58,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=390, Unknown=0, NotChecked=0, Total=650 [2021-01-06 19:20:58,944 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 26 states. [2021-01-06 19:20:59,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:59,265 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2021-01-06 19:20:59,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 19:20:59,266 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 124 [2021-01-06 19:20:59,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:59,268 INFO L225 Difference]: With dead ends: 76 [2021-01-06 19:20:59,269 INFO L226 Difference]: Without dead ends: 72 [2021-01-06 19:20:59,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=741, Invalid=1329, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 19:20:59,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-01-06 19:20:59,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-01-06 19:20:59,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-01-06 19:20:59,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2021-01-06 19:20:59,278 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 124 [2021-01-06 19:20:59,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:59,278 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2021-01-06 19:20:59,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 19:20:59,278 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2021-01-06 19:20:59,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-01-06 19:20:59,280 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:59,280 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:59,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:20:59,494 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:59,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:59,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1807457588, now seen corresponding path program 20 times [2021-01-06 19:20:59,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:59,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708248524] [2021-01-06 19:20:59,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:59,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:59,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:59,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:59,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:59,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:59,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:59,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:59,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:59,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:59,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:59,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:59,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:59,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:59,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:59,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:59,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:59,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:59,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:59,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:59,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:59,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:59,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:59,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:00,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:00,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:00,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:00,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:00,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:00,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:00,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:00,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:00,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:00,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:00,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:00,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:00,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:00,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:00,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:00,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:00,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:00,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:00,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:00,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:00,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2021-01-06 19:21:00,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708248524] [2021-01-06 19:21:00,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963611866] [2021-01-06 19:21:00,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:21:00,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 19:21:00,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:21:00,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 44 conjunts are in the unsatisfiable core [2021-01-06 19:21:00,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:21:00,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2021-01-06 19:21:00,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:21:00,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2021-01-06 19:21:00,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120395331] [2021-01-06 19:21:00,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 19:21:00,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:00,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 19:21:00,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=419, Unknown=0, NotChecked=0, Total=702 [2021-01-06 19:21:00,797 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 27 states. [2021-01-06 19:21:01,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:01,204 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2021-01-06 19:21:01,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 19:21:01,205 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 130 [2021-01-06 19:21:01,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:01,206 INFO L225 Difference]: With dead ends: 79 [2021-01-06 19:21:01,206 INFO L226 Difference]: Without dead ends: 75 [2021-01-06 19:21:01,208 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=809, Invalid=1447, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 19:21:01,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-01-06 19:21:01,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-01-06 19:21:01,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2021-01-06 19:21:01,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2021-01-06 19:21:01,212 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 130 [2021-01-06 19:21:01,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:01,213 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2021-01-06 19:21:01,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 19:21:01,213 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2021-01-06 19:21:01,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-01-06 19:21:01,214 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:01,214 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:01,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-06 19:21:01,430 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:01,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:01,430 INFO L82 PathProgramCache]: Analyzing trace with hash 874439510, now seen corresponding path program 21 times [2021-01-06 19:21:01,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:01,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186896243] [2021-01-06 19:21:01,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:01,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:01,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:01,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:01,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:01,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:01,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:01,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:01,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:01,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:01,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:01,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:01,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:01,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:01,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:01,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:01,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:01,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:01,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:01,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:01,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:01,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:01,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:01,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:01,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:01,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:01,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:01,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:01,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:02,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:02,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:02,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:02,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:02,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:02,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:02,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:02,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:02,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:02,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:02,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:02,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:02,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:02,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:02,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:02,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:02,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:02,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2021-01-06 19:21:02,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186896243] [2021-01-06 19:21:02,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307837888] [2021-01-06 19:21:02,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:21:02,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-01-06 19:21:02,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:21:02,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 46 conjunts are in the unsatisfiable core [2021-01-06 19:21:02,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:21:02,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2021-01-06 19:21:02,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:21:02,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2021-01-06 19:21:02,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103052923] [2021-01-06 19:21:02,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 19:21:02,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:02,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 19:21:02,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=449, Unknown=0, NotChecked=0, Total=756 [2021-01-06 19:21:02,731 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 28 states. [2021-01-06 19:21:03,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:03,142 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2021-01-06 19:21:03,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 19:21:03,143 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 136 [2021-01-06 19:21:03,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:03,144 INFO L225 Difference]: With dead ends: 82 [2021-01-06 19:21:03,144 INFO L226 Difference]: Without dead ends: 78 [2021-01-06 19:21:03,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=880, Invalid=1570, Unknown=0, NotChecked=0, Total=2450 [2021-01-06 19:21:03,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-01-06 19:21:03,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-01-06 19:21:03,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-01-06 19:21:03,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2021-01-06 19:21:03,150 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 136 [2021-01-06 19:21:03,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:03,151 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2021-01-06 19:21:03,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 19:21:03,151 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2021-01-06 19:21:03,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-01-06 19:21:03,152 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:03,152 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:03,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 19:21:03,366 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:03,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:03,367 INFO L82 PathProgramCache]: Analyzing trace with hash 849241484, now seen corresponding path program 22 times [2021-01-06 19:21:03,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:03,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116938070] [2021-01-06 19:21:03,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:03,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:03,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:03,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:03,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:03,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:03,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:03,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:03,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:03,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:03,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:03,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:03,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:03,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:03,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:03,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:03,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:03,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:03,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:03,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:03,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:03,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:03,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:03,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:03,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:03,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:03,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:03,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:03,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:03,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:04,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:04,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:04,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:04,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:04,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:04,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:04,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:04,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:04,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:04,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:04,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:04,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:04,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:04,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:04,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:04,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:04,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:04,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:04,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2021-01-06 19:21:04,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116938070] [2021-01-06 19:21:04,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232896285] [2021-01-06 19:21:04,401 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:21:04,483 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 19:21:04,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:21:04,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 48 conjunts are in the unsatisfiable core [2021-01-06 19:21:04,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:21:04,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2021-01-06 19:21:04,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:21:04,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-01-06 19:21:04,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25310830] [2021-01-06 19:21:04,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 19:21:04,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:04,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 19:21:04,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=480, Unknown=0, NotChecked=0, Total=812 [2021-01-06 19:21:04,741 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 29 states. [2021-01-06 19:21:05,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:05,186 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2021-01-06 19:21:05,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 19:21:05,187 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 142 [2021-01-06 19:21:05,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:05,188 INFO L225 Difference]: With dead ends: 85 [2021-01-06 19:21:05,188 INFO L226 Difference]: Without dead ends: 81 [2021-01-06 19:21:05,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=954, Invalid=1698, Unknown=0, NotChecked=0, Total=2652 [2021-01-06 19:21:05,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-01-06 19:21:05,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-01-06 19:21:05,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2021-01-06 19:21:05,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2021-01-06 19:21:05,194 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 142 [2021-01-06 19:21:05,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:05,195 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2021-01-06 19:21:05,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 19:21:05,195 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2021-01-06 19:21:05,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-01-06 19:21:05,196 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:05,196 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:05,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:21:05,411 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:05,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:05,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1665808022, now seen corresponding path program 23 times [2021-01-06 19:21:05,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:05,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510436533] [2021-01-06 19:21:05,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:05,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:05,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:05,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:05,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:05,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:05,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:05,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:05,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:05,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:05,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:05,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:05,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:05,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:05,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:05,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:05,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:05,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:05,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:05,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:05,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:05,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:05,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:05,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:05,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:05,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:05,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:05,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:05,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:05,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:06,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:06,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:06,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:06,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:06,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:06,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:06,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:06,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:06,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:06,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:06,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:06,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:06,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:06,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:06,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:06,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:06,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:06,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:06,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:06,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:06,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-01-06 19:21:06,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510436533] [2021-01-06 19:21:06,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367776321] [2021-01-06 19:21:06,487 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:21:06,593 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-01-06 19:21:06,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:21:06,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 50 conjunts are in the unsatisfiable core [2021-01-06 19:21:06,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:21:08,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-01-06 19:21:08,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:21:08,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 51] total 77 [2021-01-06 19:21:08,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897602237] [2021-01-06 19:21:08,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 77 states [2021-01-06 19:21:08,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:08,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-01-06 19:21:08,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=956, Invalid=4896, Unknown=0, NotChecked=0, Total=5852 [2021-01-06 19:21:08,838 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 77 states. [2021-01-06 19:21:11,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:11,114 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2021-01-06 19:21:11,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-01-06 19:21:11,114 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 148 [2021-01-06 19:21:11,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:11,116 INFO L225 Difference]: With dead ends: 88 [2021-01-06 19:21:11,116 INFO L226 Difference]: Without dead ends: 84 [2021-01-06 19:21:11,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3310 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=2778, Invalid=12474, Unknown=0, NotChecked=0, Total=15252 [2021-01-06 19:21:11,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-01-06 19:21:11,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-01-06 19:21:11,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2021-01-06 19:21:11,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2021-01-06 19:21:11,125 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 148 [2021-01-06 19:21:11,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:11,126 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2021-01-06 19:21:11,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2021-01-06 19:21:11,126 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2021-01-06 19:21:11,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-01-06 19:21:11,127 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:11,127 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:11,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-06 19:21:11,337 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:11,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:11,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1715345484, now seen corresponding path program 24 times [2021-01-06 19:21:11,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:11,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826394023] [2021-01-06 19:21:11,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:11,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:11,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:11,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:11,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:11,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:11,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:11,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:11,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:11,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:11,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:11,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:11,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:11,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:11,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:11,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:11,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:11,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:11,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:11,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:11,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:11,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:11,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:11,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:11,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:11,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:11,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:11,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:11,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:11,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:11,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:12,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:12,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:12,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:12,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:12,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:12,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:12,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:12,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:12,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:12,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:12,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:12,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:12,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:12,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:12,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:12,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:12,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:12,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:12,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:12,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:12,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:12,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2021-01-06 19:21:12,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826394023] [2021-01-06 19:21:12,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110333346] [2021-01-06 19:21:12,621 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:21:12,772 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-01-06 19:21:12,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:21:12,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 52 conjunts are in the unsatisfiable core [2021-01-06 19:21:12,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:21:13,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2021-01-06 19:21:13,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:21:13,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-01-06 19:21:13,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145832244] [2021-01-06 19:21:13,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 19:21:13,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:13,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 19:21:13,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=545, Unknown=0, NotChecked=0, Total=930 [2021-01-06 19:21:13,033 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 31 states. [2021-01-06 19:21:13,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:13,556 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2021-01-06 19:21:13,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 19:21:13,557 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 154 [2021-01-06 19:21:13,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:13,558 INFO L225 Difference]: With dead ends: 91 [2021-01-06 19:21:13,558 INFO L226 Difference]: Without dead ends: 87 [2021-01-06 19:21:13,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1111, Invalid=1969, Unknown=0, NotChecked=0, Total=3080 [2021-01-06 19:21:13,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-01-06 19:21:13,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-01-06 19:21:13,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2021-01-06 19:21:13,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2021-01-06 19:21:13,564 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 154 [2021-01-06 19:21:13,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:13,564 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2021-01-06 19:21:13,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-01-06 19:21:13,565 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2021-01-06 19:21:13,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-01-06 19:21:13,566 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:13,566 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:13,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:21:13,773 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:13,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:13,774 INFO L82 PathProgramCache]: Analyzing trace with hash -678635050, now seen corresponding path program 25 times [2021-01-06 19:21:13,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:13,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825320761] [2021-01-06 19:21:13,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:13,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 19:21:13,815 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 19:21:13,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 19:21:13,891 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 19:21:13,934 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-01-06 19:21:13,934 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 19:21:13,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-01-06 19:21:14,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 07:21:14 BoogieIcfgContainer [2021-01-06 19:21:14,033 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 19:21:14,034 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 19:21:14,034 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 19:21:14,037 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 19:21:14,038 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 07:20:34" (3/4) ... [2021-01-06 19:21:14,040 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-01-06 19:21:14,122 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/recursive-simple/id_i25_o25-2.c-witness.graphml [2021-01-06 19:21:14,123 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 19:21:14,125 INFO L168 Benchmark]: Toolchain (without parser) took 40201.41 ms. Allocated memory was 162.5 MB in the beginning and 626.0 MB in the end (delta: 463.5 MB). Free memory was 138.0 MB in the beginning and 548.1 MB in the end (delta: -410.1 MB). Peak memory consumption was 54.7 MB. Max. memory is 8.0 GB. [2021-01-06 19:21:14,125 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 162.5 MB. Free memory is still 134.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 19:21:14,126 INFO L168 Benchmark]: CACSL2BoogieTranslator took 337.11 ms. Allocated memory is still 162.5 MB. Free memory was 137.8 MB in the beginning and 128.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-01-06 19:21:14,126 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.11 ms. Allocated memory is still 162.5 MB. Free memory was 128.6 MB in the beginning and 127.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 19:21:14,126 INFO L168 Benchmark]: Boogie Preprocessor took 19.24 ms. Allocated memory is still 162.5 MB. Free memory was 127.3 MB in the beginning and 126.4 MB in the end (delta: 955.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 19:21:14,127 INFO L168 Benchmark]: RCFGBuilder took 364.76 ms. Allocated memory is still 162.5 MB. Free memory was 126.4 MB in the beginning and 115.5 MB in the end (delta: 10.9 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-01-06 19:21:14,127 INFO L168 Benchmark]: TraceAbstraction took 39336.10 ms. Allocated memory was 162.5 MB in the beginning and 626.0 MB in the end (delta: 463.5 MB). Free memory was 115.0 MB in the beginning and 555.5 MB in the end (delta: -440.5 MB). Peak memory consumption was 24.3 MB. Max. memory is 8.0 GB. [2021-01-06 19:21:14,128 INFO L168 Benchmark]: Witness Printer took 89.26 ms. Allocated memory is still 626.0 MB. Free memory was 555.0 MB in the beginning and 548.1 MB in the end (delta: 6.8 MB). Peak memory consumption was 7.3 MB. Max. memory is 8.0 GB. [2021-01-06 19:21:14,130 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 162.5 MB. Free memory is still 134.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 337.11 ms. Allocated memory is still 162.5 MB. Free memory was 137.8 MB in the beginning and 128.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 35.11 ms. Allocated memory is still 162.5 MB. Free memory was 128.6 MB in the beginning and 127.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 19.24 ms. Allocated memory is still 162.5 MB. Free memory was 127.3 MB in the beginning and 126.4 MB in the end (delta: 955.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 364.76 ms. Allocated memory is still 162.5 MB. Free memory was 126.4 MB in the beginning and 115.5 MB in the end (delta: 10.9 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 39336.10 ms. Allocated memory was 162.5 MB in the beginning and 626.0 MB in the end (delta: 463.5 MB). Free memory was 115.0 MB in the beginning and 555.5 MB in the end (delta: -440.5 MB). Peak memory consumption was 24.3 MB. Max. memory is 8.0 GB. * Witness Printer took 89.26 ms. Allocated memory is still 626.0 MB. Free memory was 555.0 MB in the beginning and 548.1 MB in the end (delta: 6.8 MB). Peak memory consumption was 7.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L12] int input = 25; [L13] CALL, EXPR id(input) VAL [\old(x)=25] [L7] COND FALSE !(x==0) VAL [\old(x)=25, x=25] [L8] CALL, EXPR id(x-1) VAL [\old(x)=24] [L7] COND FALSE !(x==0) VAL [\old(x)=24, x=24] [L8] CALL, EXPR id(x-1) VAL [\old(x)=23] [L7] COND FALSE !(x==0) VAL [\old(x)=23, x=23] [L8] CALL, EXPR id(x-1) VAL [\old(x)=22] [L7] COND FALSE !(x==0) VAL [\old(x)=22, x=22] [L8] CALL, EXPR id(x-1) VAL [\old(x)=21] [L7] COND FALSE !(x==0) VAL [\old(x)=21, x=21] [L8] CALL, EXPR id(x-1) VAL [\old(x)=20] [L7] COND FALSE !(x==0) VAL [\old(x)=20, x=20] [L8] CALL, EXPR id(x-1) VAL [\old(x)=19] [L7] COND FALSE !(x==0) VAL [\old(x)=19, x=19] [L8] CALL, EXPR id(x-1) VAL [\old(x)=18] [L7] COND FALSE !(x==0) VAL [\old(x)=18, x=18] [L8] CALL, EXPR id(x-1) VAL [\old(x)=17] [L7] COND FALSE !(x==0) VAL [\old(x)=17, x=17] [L8] CALL, EXPR id(x-1) VAL [\old(x)=16] [L7] COND FALSE !(x==0) VAL [\old(x)=16, x=16] [L8] CALL, EXPR id(x-1) VAL [\old(x)=15] [L7] COND FALSE !(x==0) VAL [\old(x)=15, x=15] [L8] CALL, EXPR id(x-1) VAL [\old(x)=14] [L7] COND FALSE !(x==0) VAL [\old(x)=14, x=14] [L8] CALL, EXPR id(x-1) VAL [\old(x)=13] [L7] COND FALSE !(x==0) VAL [\old(x)=13, x=13] [L8] CALL, EXPR id(x-1) VAL [\old(x)=12] [L7] COND FALSE !(x==0) VAL [\old(x)=12, x=12] [L8] CALL, EXPR id(x-1) VAL [\old(x)=11] [L7] COND FALSE !(x==0) VAL [\old(x)=11, x=11] [L8] CALL, EXPR id(x-1) VAL [\old(x)=10] [L7] COND FALSE !(x==0) VAL [\old(x)=10, x=10] [L8] CALL, EXPR id(x-1) VAL [\old(x)=9] [L7] COND FALSE !(x==0) VAL [\old(x)=9, x=9] [L8] CALL, EXPR id(x-1) VAL [\old(x)=8] [L7] COND FALSE !(x==0) VAL [\old(x)=8, x=8] [L8] CALL, EXPR id(x-1) VAL [\old(x)=7] [L7] COND FALSE !(x==0) VAL [\old(x)=7, x=7] [L8] CALL, EXPR id(x-1) VAL [\old(x)=6] [L7] COND FALSE !(x==0) VAL [\old(x)=6, x=6] [L8] CALL, EXPR id(x-1) VAL [\old(x)=5] [L7] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L8] CALL, EXPR id(x-1) VAL [\old(x)=4] [L7] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L8] CALL, EXPR id(x-1) VAL [\old(x)=3] [L7] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L8] CALL, EXPR id(x-1) VAL [\old(x)=2] [L7] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L8] CALL, EXPR id(x-1) VAL [\old(x)=1] [L7] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L8] CALL, EXPR id(x-1) VAL [\old(x)=0] [L7] COND TRUE x==0 [L7] return 0; VAL [\old(x)=0, \result=0, x=0] [L8] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=5, id(x-1)=4, x=5] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=6, id(x-1)=5, x=6] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=7, id(x-1)=6, x=7] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=8, id(x-1)=7, x=8] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=9, id(x-1)=8, x=9] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=10, id(x-1)=9, x=10] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=11, id(x-1)=10, x=11] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=12, id(x-1)=11, x=12] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=13, id(x-1)=12, x=13] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=14, id(x-1)=13, x=14] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=15, id(x-1)=14, x=15] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=16, id(x-1)=15, x=16] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=17, id(x-1)=16, x=17] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=18, id(x-1)=17, x=18] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=19, id(x-1)=18, x=19] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=20, id(x-1)=19, x=20] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=21, id(x-1)=20, x=21] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=22, id(x-1)=21, x=22] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=23, id(x-1)=22, x=23] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=24, id(x-1)=23, x=24] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=25, id(x-1)=24, x=25] [L8] return id(x-1) + 1; [L13] RET, EXPR id(input) [L13] int result = id(input); [L14] COND TRUE result == 25 [L15] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 39.0s, OverallIterations: 26, TraceHistogramMax: 26, AutomataDifference: 9.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 250 SDtfs, 1094 SDslu, 1797 SDs, 0 SdLazy, 1549 SolverSat, 330 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3450 GetRequests, 2521 SyntacticMatches, 0 SemanticMatches, 929 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10621 ImplicationChecksByTransitivity, 15.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=87occurred in iteration=25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 25 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.6s SatisfiabilityAnalysisTime, 20.8s InterpolantComputationTime, 4250 NumberOfCodeBlocks, 4250 NumberOfCodeBlocksAsserted, 222 NumberOfCheckSat, 4041 ConstructedInterpolants, 0 QuantifiedInterpolants, 1070277 SizeOfPredicates, 279 NumberOfNonLiveVariables, 5472 ConjunctsInSsa, 696 ConjunctsInUnsatCore, 49 InterpolantComputations, 1 PerfectInterpolantSequences, 15000/30000 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...