/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/loops-crafted-1/mono-crafted_9.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 07:09:11,366 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 07:09:11,370 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 07:09:11,420 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 07:09:11,420 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 07:09:11,422 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 07:09:11,423 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 07:09:11,434 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 07:09:11,436 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 07:09:11,437 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 07:09:11,439 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 07:09:11,440 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 07:09:11,441 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 07:09:11,442 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 07:09:11,443 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 07:09:11,444 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 07:09:11,445 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 07:09:11,446 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 07:09:11,448 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 07:09:11,451 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 07:09:11,453 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 07:09:11,454 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 07:09:11,456 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 07:09:11,457 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 07:09:11,460 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-23 07:09:11,460 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-23 07:09:11,461 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-23 07:09:11,462 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-23 07:09:11,463 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-23 07:09:11,464 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-23 07:09:11,464 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 07:09:11,465 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 07:09:11,466 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 07:09:11,467 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 07:09:11,468 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 07:09:11,468 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 07:09:11,469 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 07:09:11,470 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 07:09:11,470 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 07:09:11,471 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 07:09:11,472 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 07:09:11,476 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 07:09:11,502 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 07:09:11,502 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 07:09:11,504 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 07:09:11,504 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 07:09:11,505 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 07:09:11,505 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 07:09:11,505 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 07:09:11,506 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 07:09:11,506 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 07:09:11,506 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 07:09:11,506 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 07:09:11,507 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 07:09:11,507 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 07:09:11,507 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 07:09:11,507 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 07:09:11,508 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 07:09:11,508 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 07:09:11,508 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 07:09:11,509 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 07:09:11,509 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 07:09:11,509 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 07:09:11,509 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 07:09:11,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 07:09:11,510 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 07:09:11,510 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 07:09:11,510 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 07:09:11,951 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 07:09:11,985 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 07:09:11,988 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 07:09:11,989 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 07:09:11,990 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 07:09:11,991 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/mono-crafted_9.c [2020-12-23 07:09:12,060 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c97968981/739887c23f2647b099946526af346709/FLAG10e1143d5 [2020-12-23 07:09:12,608 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 07:09:12,608 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/mono-crafted_9.c [2020-12-23 07:09:12,615 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c97968981/739887c23f2647b099946526af346709/FLAG10e1143d5 [2020-12-23 07:09:13,004 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c97968981/739887c23f2647b099946526af346709 [2020-12-23 07:09:13,008 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 07:09:13,011 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 07:09:13,013 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 07:09:13,014 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 07:09:13,017 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 07:09:13,019 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:09:13" (1/1) ... [2020-12-23 07:09:13,021 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@541ec934 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:09:13, skipping insertion in model container [2020-12-23 07:09:13,021 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:09:13" (1/1) ... [2020-12-23 07:09:13,034 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 07:09:13,051 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 07:09:13,226 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/mono-crafted_9.c[318,331] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] [2020-12-23 07:09:13,245 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:09:13,254 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 07:09:13,266 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/mono-crafted_9.c[318,331] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] [2020-12-23 07:09:13,269 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:09:13,285 INFO L208 MainTranslator]: Completed translation [2020-12-23 07:09:13,285 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:09:13 WrapperNode [2020-12-23 07:09:13,286 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 07:09:13,287 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 07:09:13,287 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 07:09:13,287 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 07:09:13,296 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:09:13" (1/1) ... [2020-12-23 07:09:13,304 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:09:13" (1/1) ... [2020-12-23 07:09:13,322 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 07:09:13,323 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 07:09:13,323 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 07:09:13,323 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 07:09:13,332 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:09:13" (1/1) ... [2020-12-23 07:09:13,332 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:09:13" (1/1) ... [2020-12-23 07:09:13,334 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:09:13" (1/1) ... [2020-12-23 07:09:13,334 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:09:13" (1/1) ... [2020-12-23 07:09:13,337 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:09:13" (1/1) ... [2020-12-23 07:09:13,341 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:09:13" (1/1) ... [2020-12-23 07:09:13,342 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:09:13" (1/1) ... [2020-12-23 07:09:13,343 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 07:09:13,344 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 07:09:13,344 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 07:09:13,345 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 07:09:13,345 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:09:13" (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 [2020-12-23 07:09:13,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 07:09:13,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 07:09:13,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 07:09:13,435 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 07:09:13,633 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 07:09:13,634 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-23 07:09:13,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:09:13 BoogieIcfgContainer [2020-12-23 07:09:13,636 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 07:09:13,638 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 07:09:13,638 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 07:09:13,641 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 07:09:13,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 07:09:13" (1/3) ... [2020-12-23 07:09:13,643 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30bb98f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:09:13, skipping insertion in model container [2020-12-23 07:09:13,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:09:13" (2/3) ... [2020-12-23 07:09:13,643 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30bb98f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:09:13, skipping insertion in model container [2020-12-23 07:09:13,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:09:13" (3/3) ... [2020-12-23 07:09:13,645 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_9.c [2020-12-23 07:09:13,652 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 07:09:13,657 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 07:09:13,677 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 07:09:13,719 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 07:09:13,720 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 07:09:13,720 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 07:09:13,720 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 07:09:13,720 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 07:09:13,720 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 07:09:13,721 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 07:09:13,721 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 07:09:13,735 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-12-23 07:09:13,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 07:09:13,740 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:13,741 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 07:09:13,742 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:13,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:13,749 INFO L82 PathProgramCache]: Analyzing trace with hash 889937703, now seen corresponding path program 1 times [2020-12-23 07:09:13,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:13,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234836401] [2020-12-23 07:09:13,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:13,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:13,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:09:13,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234836401] [2020-12-23 07:09:13,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:09:13,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 07:09:13,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683844939] [2020-12-23 07:09:13,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 07:09:13,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:13,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 07:09:13,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 07:09:13,945 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2020-12-23 07:09:13,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:13,961 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2020-12-23 07:09:13,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 07:09:13,963 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-12-23 07:09:13,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:13,972 INFO L225 Difference]: With dead ends: 20 [2020-12-23 07:09:13,972 INFO L226 Difference]: Without dead ends: 8 [2020-12-23 07:09:13,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 07:09:13,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-12-23 07:09:14,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-12-23 07:09:14,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-12-23 07:09:14,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2020-12-23 07:09:14,012 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2020-12-23 07:09:14,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:14,013 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2020-12-23 07:09:14,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 07:09:14,013 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2020-12-23 07:09:14,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 07:09:14,014 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:14,014 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 07:09:14,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 07:09:14,015 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:14,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:14,016 INFO L82 PathProgramCache]: Analyzing trace with hash 889639793, now seen corresponding path program 1 times [2020-12-23 07:09:14,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:14,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469088464] [2020-12-23 07:09:14,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:14,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:14,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:09:14,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469088464] [2020-12-23 07:09:14,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:09:14,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 07:09:14,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905120996] [2020-12-23 07:09:14,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 07:09:14,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:14,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 07:09:14,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 07:09:14,090 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 3 states. [2020-12-23 07:09:14,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:14,118 INFO L93 Difference]: Finished difference Result 16 states and 20 transitions. [2020-12-23 07:09:14,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 07:09:14,120 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-23 07:09:14,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:14,120 INFO L225 Difference]: With dead ends: 16 [2020-12-23 07:09:14,121 INFO L226 Difference]: Without dead ends: 10 [2020-12-23 07:09:14,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 07:09:14,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-23 07:09:14,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-12-23 07:09:14,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-23 07:09:14,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2020-12-23 07:09:14,126 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2020-12-23 07:09:14,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:14,126 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-12-23 07:09:14,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 07:09:14,127 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2020-12-23 07:09:14,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 07:09:14,127 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:14,128 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:14,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 07:09:14,128 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:14,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:14,129 INFO L82 PathProgramCache]: Analyzing trace with hash 295691924, now seen corresponding path program 1 times [2020-12-23 07:09:14,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:14,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371199917] [2020-12-23 07:09:14,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:14,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:14,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:09:14,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371199917] [2020-12-23 07:09:14,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986403281] [2020-12-23 07:09:14,215 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 [2020-12-23 07:09:14,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:14,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 07:09:14,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:14,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:09:14,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:14,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 07:09:14,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615740995] [2020-12-23 07:09:14,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 07:09:14,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:14,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 07:09:14,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:09:14,357 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 5 states. [2020-12-23 07:09:14,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:14,395 INFO L93 Difference]: Finished difference Result 18 states and 22 transitions. [2020-12-23 07:09:14,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 07:09:14,396 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-23 07:09:14,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:14,397 INFO L225 Difference]: With dead ends: 18 [2020-12-23 07:09:14,397 INFO L226 Difference]: Without dead ends: 12 [2020-12-23 07:09:14,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:09:14,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-23 07:09:14,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-12-23 07:09:14,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-23 07:09:14,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-12-23 07:09:14,401 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2020-12-23 07:09:14,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:14,402 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-12-23 07:09:14,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 07:09:14,402 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-12-23 07:09:14,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 07:09:14,403 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:14,403 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:14,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 07:09:14,617 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:14,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:14,619 INFO L82 PathProgramCache]: Analyzing trace with hash 742440183, now seen corresponding path program 2 times [2020-12-23 07:09:14,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:14,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531675698] [2020-12-23 07:09:14,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:14,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:14,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 07:09:14,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531675698] [2020-12-23 07:09:14,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:09:14,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 07:09:14,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491987503] [2020-12-23 07:09:14,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 07:09:14,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:14,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 07:09:14,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 07:09:14,684 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 3 states. [2020-12-23 07:09:14,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:14,708 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2020-12-23 07:09:14,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 07:09:14,710 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-12-23 07:09:14,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:14,711 INFO L225 Difference]: With dead ends: 18 [2020-12-23 07:09:14,711 INFO L226 Difference]: Without dead ends: 14 [2020-12-23 07:09:14,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 07:09:14,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-23 07:09:14,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2020-12-23 07:09:14,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-23 07:09:14,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-12-23 07:09:14,718 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-12-23 07:09:14,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:14,719 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-12-23 07:09:14,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 07:09:14,719 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-12-23 07:09:14,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 07:09:14,720 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:14,720 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:14,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 07:09:14,720 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:14,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:14,721 INFO L82 PathProgramCache]: Analyzing trace with hash 572634524, now seen corresponding path program 1 times [2020-12-23 07:09:14,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:14,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024642996] [2020-12-23 07:09:14,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:14,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:14,821 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:09:14,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024642996] [2020-12-23 07:09:14,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085451256] [2020-12-23 07:09:14,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:14,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:14,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 07:09:14,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:14,899 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:09:14,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:14,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 07:09:14,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65455052] [2020-12-23 07:09:14,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:09:14,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:14,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:09:14,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:09:14,902 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 6 states. [2020-12-23 07:09:14,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:14,930 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2020-12-23 07:09:14,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 07:09:14,932 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-12-23 07:09:14,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:14,933 INFO L225 Difference]: With dead ends: 22 [2020-12-23 07:09:14,933 INFO L226 Difference]: Without dead ends: 15 [2020-12-23 07:09:14,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:09:14,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-23 07:09:14,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-23 07:09:14,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-23 07:09:14,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-12-23 07:09:14,939 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2020-12-23 07:09:14,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:14,940 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-12-23 07:09:14,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:09:14,941 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-12-23 07:09:14,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 07:09:14,941 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:14,941 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:15,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:15,143 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:15,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:15,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1176853889, now seen corresponding path program 2 times [2020-12-23 07:09:15,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:15,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518660171] [2020-12-23 07:09:15,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:15,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:15,204 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:09:15,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518660171] [2020-12-23 07:09:15,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058509999] [2020-12-23 07:09:15,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:15,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:09:15,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:15,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 07:09:15,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:15,325 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:09:15,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:15,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 07:09:15,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974228067] [2020-12-23 07:09:15,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 07:09:15,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:15,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 07:09:15,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:09:15,329 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 7 states. [2020-12-23 07:09:15,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:15,374 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2020-12-23 07:09:15,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 07:09:15,375 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-12-23 07:09:15,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:15,377 INFO L225 Difference]: With dead ends: 24 [2020-12-23 07:09:15,377 INFO L226 Difference]: Without dead ends: 17 [2020-12-23 07:09:15,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:09:15,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-23 07:09:15,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-23 07:09:15,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-23 07:09:15,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-12-23 07:09:15,391 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2020-12-23 07:09:15,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:15,392 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-12-23 07:09:15,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 07:09:15,393 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-12-23 07:09:15,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 07:09:15,393 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:15,394 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:15,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:15,609 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:15,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:15,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1191961250, now seen corresponding path program 3 times [2020-12-23 07:09:15,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:15,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337519283] [2020-12-23 07:09:15,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:15,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:15,670 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:09:15,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337519283] [2020-12-23 07:09:15,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947919288] [2020-12-23 07:09:15,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:15,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 07:09:15,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:15,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 07:09:15,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:15,767 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-23 07:09:15,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:15,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2020-12-23 07:09:15,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221852834] [2020-12-23 07:09:15,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 07:09:15,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:15,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 07:09:15,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:09:15,770 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2020-12-23 07:09:15,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:15,810 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2020-12-23 07:09:15,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 07:09:15,811 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2020-12-23 07:09:15,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:15,813 INFO L225 Difference]: With dead ends: 29 [2020-12-23 07:09:15,813 INFO L226 Difference]: Without dead ends: 22 [2020-12-23 07:09:15,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:09:15,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-23 07:09:15,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-12-23 07:09:15,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-23 07:09:15,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-12-23 07:09:15,819 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2020-12-23 07:09:15,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:15,820 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-12-23 07:09:15,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 07:09:15,820 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-12-23 07:09:15,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 07:09:15,821 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:15,821 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:16,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:16,036 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:16,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:16,037 INFO L82 PathProgramCache]: Analyzing trace with hash -885484758, now seen corresponding path program 4 times [2020-12-23 07:09:16,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:16,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132347118] [2020-12-23 07:09:16,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:16,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:16,122 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:09:16,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132347118] [2020-12-23 07:09:16,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855686103] [2020-12-23 07:09:16,123 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:16,195 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:09:16,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:16,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 07:09:16,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:16,256 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:09:16,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:16,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-23 07:09:16,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131884097] [2020-12-23 07:09:16,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 07:09:16,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:16,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 07:09:16,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:09:16,258 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 9 states. [2020-12-23 07:09:16,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:16,296 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2020-12-23 07:09:16,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 07:09:16,296 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-12-23 07:09:16,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:16,297 INFO L225 Difference]: With dead ends: 32 [2020-12-23 07:09:16,297 INFO L226 Difference]: Without dead ends: 23 [2020-12-23 07:09:16,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:09:16,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-23 07:09:16,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-23 07:09:16,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-23 07:09:16,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-12-23 07:09:16,302 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2020-12-23 07:09:16,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:16,303 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-12-23 07:09:16,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 07:09:16,303 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-12-23 07:09:16,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 07:09:16,304 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:16,304 INFO L422 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:16,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:16,518 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:16,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:16,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1175196403, now seen corresponding path program 5 times [2020-12-23 07:09:16,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:16,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125854586] [2020-12-23 07:09:16,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:16,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:16,593 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:09:16,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125854586] [2020-12-23 07:09:16,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637272400] [2020-12-23 07:09:16,594 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:16,645 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-12-23 07:09:16,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:16,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 07:09:16,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:16,690 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:09:16,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:16,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 07:09:16,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999647905] [2020-12-23 07:09:16,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 07:09:16,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:16,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 07:09:16,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:09:16,693 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 10 states. [2020-12-23 07:09:16,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:16,725 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2020-12-23 07:09:16,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 07:09:16,726 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2020-12-23 07:09:16,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:16,727 INFO L225 Difference]: With dead ends: 34 [2020-12-23 07:09:16,727 INFO L226 Difference]: Without dead ends: 25 [2020-12-23 07:09:16,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:09:16,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-23 07:09:16,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-12-23 07:09:16,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-23 07:09:16,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-12-23 07:09:16,732 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 22 [2020-12-23 07:09:16,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:16,732 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-12-23 07:09:16,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 07:09:16,732 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-12-23 07:09:16,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 07:09:16,733 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:16,733 INFO L422 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:16,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:16,948 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:16,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:16,949 INFO L82 PathProgramCache]: Analyzing trace with hash -415213008, now seen corresponding path program 6 times [2020-12-23 07:09:16,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:16,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713935577] [2020-12-23 07:09:16,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:16,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:17,025 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:09:17,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713935577] [2020-12-23 07:09:17,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504873880] [2020-12-23 07:09:17,026 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:17,080 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-12-23 07:09:17,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:17,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 07:09:17,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:17,159 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:09:17,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:17,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 13 [2020-12-23 07:09:17,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597436690] [2020-12-23 07:09:17,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 07:09:17,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:17,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 07:09:17,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:09:17,162 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 13 states. [2020-12-23 07:09:17,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:17,222 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2020-12-23 07:09:17,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 07:09:17,222 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2020-12-23 07:09:17,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:17,223 INFO L225 Difference]: With dead ends: 40 [2020-12-23 07:09:17,223 INFO L226 Difference]: Without dead ends: 31 [2020-12-23 07:09:17,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:09:17,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-23 07:09:17,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-12-23 07:09:17,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 07:09:17,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-12-23 07:09:17,228 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 24 [2020-12-23 07:09:17,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:17,229 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-12-23 07:09:17,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 07:09:17,229 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-12-23 07:09:17,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 07:09:17,230 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:17,230 INFO L422 BasicCegarLoop]: trace histogram [12, 10, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:17,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 07:09:17,444 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:17,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:17,446 INFO L82 PathProgramCache]: Analyzing trace with hash -480119527, now seen corresponding path program 7 times [2020-12-23 07:09:17,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:17,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539016637] [2020-12-23 07:09:17,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:17,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:17,576 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 33 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:09:17,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539016637] [2020-12-23 07:09:17,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704777050] [2020-12-23 07:09:17,581 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:17,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:17,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 07:09:17,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:17,719 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 33 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:09:17,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:17,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-23 07:09:17,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093717854] [2020-12-23 07:09:17,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 07:09:17,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:17,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 07:09:17,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 07:09:17,722 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 14 states. [2020-12-23 07:09:17,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:17,783 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2020-12-23 07:09:17,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 07:09:17,783 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 30 [2020-12-23 07:09:17,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:17,784 INFO L225 Difference]: With dead ends: 42 [2020-12-23 07:09:17,784 INFO L226 Difference]: Without dead ends: 33 [2020-12-23 07:09:17,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 07:09:17,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-23 07:09:17,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-12-23 07:09:17,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 07:09:17,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-12-23 07:09:17,790 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 30 [2020-12-23 07:09:17,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:17,790 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-12-23 07:09:17,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 07:09:17,790 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-12-23 07:09:17,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 07:09:17,791 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:17,791 INFO L422 BasicCegarLoop]: trace histogram [13, 11, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:18,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-23 07:09:18,006 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:18,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:18,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1833733948, now seen corresponding path program 8 times [2020-12-23 07:09:18,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:18,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052074706] [2020-12-23 07:09:18,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:18,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:18,144 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 36 proven. 132 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:09:18,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052074706] [2020-12-23 07:09:18,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528213544] [2020-12-23 07:09:18,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:18,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:09:18,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:18,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 07:09:18,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:18,252 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 36 proven. 132 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:09:18,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:18,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-23 07:09:18,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974491889] [2020-12-23 07:09:18,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 07:09:18,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:18,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 07:09:18,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 07:09:18,254 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 15 states. [2020-12-23 07:09:18,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:18,329 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2020-12-23 07:09:18,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 07:09:18,330 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 32 [2020-12-23 07:09:18,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:18,331 INFO L225 Difference]: With dead ends: 44 [2020-12-23 07:09:18,331 INFO L226 Difference]: Without dead ends: 35 [2020-12-23 07:09:18,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 07:09:18,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-23 07:09:18,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-12-23 07:09:18,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-23 07:09:18,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-12-23 07:09:18,336 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 32 [2020-12-23 07:09:18,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:18,337 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-12-23 07:09:18,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 07:09:18,337 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-12-23 07:09:18,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 07:09:18,338 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:18,338 INFO L422 BasicCegarLoop]: trace histogram [14, 12, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:18,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:18,554 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:18,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:18,555 INFO L82 PathProgramCache]: Analyzing trace with hash 653864095, now seen corresponding path program 9 times [2020-12-23 07:09:18,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:18,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81961806] [2020-12-23 07:09:18,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:18,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:18,743 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 39 proven. 156 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:09:18,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81961806] [2020-12-23 07:09:18,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887122979] [2020-12-23 07:09:18,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:18,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-23 07:09:18,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:18,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 07:09:18,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:18,879 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 60 proven. 4 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-12-23 07:09:18,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:18,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5] total 18 [2020-12-23 07:09:18,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584292198] [2020-12-23 07:09:18,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 07:09:18,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:18,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 07:09:18,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 07:09:18,881 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 18 states. [2020-12-23 07:09:18,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:18,974 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2020-12-23 07:09:18,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 07:09:18,974 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2020-12-23 07:09:18,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:18,975 INFO L225 Difference]: With dead ends: 49 [2020-12-23 07:09:18,975 INFO L226 Difference]: Without dead ends: 40 [2020-12-23 07:09:18,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 07:09:18,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-23 07:09:18,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-12-23 07:09:18,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-23 07:09:18,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2020-12-23 07:09:18,981 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 34 [2020-12-23 07:09:18,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:18,982 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2020-12-23 07:09:18,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 07:09:18,982 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-12-23 07:09:18,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 07:09:18,983 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:18,983 INFO L422 BasicCegarLoop]: trace histogram [16, 13, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:19,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:19,198 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:19,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:19,199 INFO L82 PathProgramCache]: Analyzing trace with hash -33157337, now seen corresponding path program 10 times [2020-12-23 07:09:19,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:19,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667011456] [2020-12-23 07:09:19,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:19,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:19,432 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 70 proven. 182 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:09:19,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667011456] [2020-12-23 07:09:19,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98963339] [2020-12-23 07:09:19,433 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:19,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:09:19,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:19,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 07:09:19,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:19,553 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 70 proven. 182 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:09:19,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:19,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-23 07:09:19,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854306503] [2020-12-23 07:09:19,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 07:09:19,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:19,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 07:09:19,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 07:09:19,555 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 17 states. [2020-12-23 07:09:19,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:19,621 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-12-23 07:09:19,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 07:09:19,622 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 38 [2020-12-23 07:09:19,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:19,622 INFO L225 Difference]: With dead ends: 52 [2020-12-23 07:09:19,622 INFO L226 Difference]: Without dead ends: 41 [2020-12-23 07:09:19,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 07:09:19,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-23 07:09:19,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-12-23 07:09:19,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-23 07:09:19,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2020-12-23 07:09:19,629 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 38 [2020-12-23 07:09:19,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:19,629 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2020-12-23 07:09:19,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 07:09:19,629 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2020-12-23 07:09:19,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 07:09:19,630 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:19,630 INFO L422 BasicCegarLoop]: trace histogram [17, 14, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:19,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 07:09:19,839 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:19,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:19,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1846662730, now seen corresponding path program 11 times [2020-12-23 07:09:19,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:19,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706839721] [2020-12-23 07:09:19,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:19,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:20,028 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 75 proven. 210 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:09:20,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706839721] [2020-12-23 07:09:20,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645594581] [2020-12-23 07:09:20,029 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:20,086 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-23 07:09:20,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:20,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 07:09:20,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:20,158 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 75 proven. 210 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:09:20,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:20,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-23 07:09:20,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912673540] [2020-12-23 07:09:20,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 07:09:20,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:20,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 07:09:20,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 07:09:20,161 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 18 states. [2020-12-23 07:09:20,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:20,236 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-12-23 07:09:20,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 07:09:20,236 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 40 [2020-12-23 07:09:20,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:20,237 INFO L225 Difference]: With dead ends: 54 [2020-12-23 07:09:20,237 INFO L226 Difference]: Without dead ends: 43 [2020-12-23 07:09:20,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 07:09:20,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-23 07:09:20,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-12-23 07:09:20,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-23 07:09:20,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2020-12-23 07:09:20,244 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 40 [2020-12-23 07:09:20,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:20,244 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2020-12-23 07:09:20,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 07:09:20,244 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2020-12-23 07:09:20,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-23 07:09:20,245 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:20,246 INFO L422 BasicCegarLoop]: trace histogram [18, 15, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:20,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 07:09:20,459 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:20,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:20,460 INFO L82 PathProgramCache]: Analyzing trace with hash 172515501, now seen corresponding path program 12 times [2020-12-23 07:09:20,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:20,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18762515] [2020-12-23 07:09:20,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:20,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:20,665 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 80 proven. 240 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:09:20,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18762515] [2020-12-23 07:09:20,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384983652] [2020-12-23 07:09:20,666 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:20,725 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-12-23 07:09:20,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:20,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 07:09:20,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:20,851 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 105 proven. 9 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-23 07:09:20,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:20,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 6] total 22 [2020-12-23 07:09:20,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239250164] [2020-12-23 07:09:20,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 07:09:20,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:20,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 07:09:20,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 07:09:20,853 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 22 states. [2020-12-23 07:09:20,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:20,955 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2020-12-23 07:09:20,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 07:09:20,956 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2020-12-23 07:09:20,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:20,957 INFO L225 Difference]: With dead ends: 59 [2020-12-23 07:09:20,957 INFO L226 Difference]: Without dead ends: 48 [2020-12-23 07:09:20,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 07:09:20,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-23 07:09:20,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-12-23 07:09:20,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-23 07:09:20,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-12-23 07:09:20,963 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 42 [2020-12-23 07:09:20,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:20,963 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-12-23 07:09:20,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 07:09:20,964 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-12-23 07:09:20,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 07:09:20,965 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:20,965 INFO L422 BasicCegarLoop]: trace histogram [20, 16, 4, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:21,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 07:09:21,179 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:21,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:21,180 INFO L82 PathProgramCache]: Analyzing trace with hash -870062923, now seen corresponding path program 13 times [2020-12-23 07:09:21,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:21,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427196714] [2020-12-23 07:09:21,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:21,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:21,421 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 119 proven. 272 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-23 07:09:21,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427196714] [2020-12-23 07:09:21,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205393349] [2020-12-23 07:09:21,422 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:21,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:21,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 07:09:21,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:21,544 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 119 proven. 272 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-23 07:09:21,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:21,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-23 07:09:21,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595400058] [2020-12-23 07:09:21,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 07:09:21,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:21,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 07:09:21,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 07:09:21,547 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 20 states. [2020-12-23 07:09:21,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:21,600 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2020-12-23 07:09:21,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 07:09:21,601 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 46 [2020-12-23 07:09:21,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:21,601 INFO L225 Difference]: With dead ends: 62 [2020-12-23 07:09:21,601 INFO L226 Difference]: Without dead ends: 49 [2020-12-23 07:09:21,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 07:09:21,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-23 07:09:21,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-12-23 07:09:21,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-23 07:09:21,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-12-23 07:09:21,607 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 46 [2020-12-23 07:09:21,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:21,608 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-12-23 07:09:21,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 07:09:21,608 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-12-23 07:09:21,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-23 07:09:21,609 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:21,609 INFO L422 BasicCegarLoop]: trace histogram [21, 17, 4, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:21,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:21,823 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:21,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:21,824 INFO L82 PathProgramCache]: Analyzing trace with hash 2027149528, now seen corresponding path program 14 times [2020-12-23 07:09:21,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:21,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186557463] [2020-12-23 07:09:21,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:21,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:22,058 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 126 proven. 306 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-23 07:09:22,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186557463] [2020-12-23 07:09:22,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680582220] [2020-12-23 07:09:22,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:22,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:09:22,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:22,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 07:09:22,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:22,194 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 126 proven. 306 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-23 07:09:22,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:22,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-23 07:09:22,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930836503] [2020-12-23 07:09:22,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 07:09:22,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:22,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 07:09:22,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 07:09:22,203 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 21 states. [2020-12-23 07:09:22,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:22,286 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2020-12-23 07:09:22,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 07:09:22,286 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 48 [2020-12-23 07:09:22,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:22,287 INFO L225 Difference]: With dead ends: 64 [2020-12-23 07:09:22,287 INFO L226 Difference]: Without dead ends: 51 [2020-12-23 07:09:22,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 07:09:22,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-23 07:09:22,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-12-23 07:09:22,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-23 07:09:22,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-12-23 07:09:22,309 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 48 [2020-12-23 07:09:22,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:22,312 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-12-23 07:09:22,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 07:09:22,312 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-12-23 07:09:22,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-23 07:09:22,313 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:22,313 INFO L422 BasicCegarLoop]: trace histogram [22, 18, 4, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:22,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 07:09:22,531 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:22,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:22,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1185460165, now seen corresponding path program 15 times [2020-12-23 07:09:22,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:22,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626585243] [2020-12-23 07:09:22,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:22,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:22,871 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 133 proven. 342 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-23 07:09:22,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626585243] [2020-12-23 07:09:22,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737087043] [2020-12-23 07:09:22,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:22,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-23 07:09:22,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:22,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 07:09:22,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:23,089 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 162 proven. 16 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2020-12-23 07:09:23,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:23,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 7] total 26 [2020-12-23 07:09:23,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971660284] [2020-12-23 07:09:23,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 07:09:23,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:23,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 07:09:23,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-23 07:09:23,092 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 26 states. [2020-12-23 07:09:23,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:23,191 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2020-12-23 07:09:23,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 07:09:23,192 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2020-12-23 07:09:23,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:23,192 INFO L225 Difference]: With dead ends: 69 [2020-12-23 07:09:23,193 INFO L226 Difference]: Without dead ends: 56 [2020-12-23 07:09:23,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-23 07:09:23,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-23 07:09:23,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-12-23 07:09:23,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-23 07:09:23,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2020-12-23 07:09:23,198 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 50 [2020-12-23 07:09:23,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:23,198 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2020-12-23 07:09:23,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 07:09:23,199 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2020-12-23 07:09:23,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-23 07:09:23,199 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:23,200 INFO L422 BasicCegarLoop]: trace histogram [24, 19, 5, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:23,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:23,413 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:23,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:23,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1656515133, now seen corresponding path program 16 times [2020-12-23 07:09:23,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:23,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974495095] [2020-12-23 07:09:23,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:23,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:23,743 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 180 proven. 380 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-23 07:09:23,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974495095] [2020-12-23 07:09:23,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040890895] [2020-12-23 07:09:23,744 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:23,793 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:09:23,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:23,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 07:09:23,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:23,888 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 180 proven. 380 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-23 07:09:23,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:23,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-23 07:09:23,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770220226] [2020-12-23 07:09:23,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 07:09:23,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:23,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 07:09:23,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 07:09:23,890 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand 23 states. [2020-12-23 07:09:23,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:23,966 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2020-12-23 07:09:23,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 07:09:23,966 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 54 [2020-12-23 07:09:23,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:23,967 INFO L225 Difference]: With dead ends: 72 [2020-12-23 07:09:23,967 INFO L226 Difference]: Without dead ends: 57 [2020-12-23 07:09:23,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 07:09:23,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-23 07:09:23,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-12-23 07:09:23,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-23 07:09:23,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2020-12-23 07:09:23,973 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 54 [2020-12-23 07:09:23,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:23,973 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2020-12-23 07:09:23,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 07:09:23,974 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2020-12-23 07:09:23,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-23 07:09:23,974 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:23,974 INFO L422 BasicCegarLoop]: trace histogram [25, 20, 5, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:24,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:24,188 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:24,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:24,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1441089818, now seen corresponding path program 17 times [2020-12-23 07:09:24,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:24,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657628369] [2020-12-23 07:09:24,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:24,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:24,485 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 189 proven. 420 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-23 07:09:24,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657628369] [2020-12-23 07:09:24,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029704054] [2020-12-23 07:09:24,486 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:24,547 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2020-12-23 07:09:24,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:24,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 07:09:24,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:24,639 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 189 proven. 420 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-23 07:09:24,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:24,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-23 07:09:24,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175560141] [2020-12-23 07:09:24,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 07:09:24,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:24,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 07:09:24,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-23 07:09:24,642 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand 24 states. [2020-12-23 07:09:24,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:24,729 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2020-12-23 07:09:24,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 07:09:24,730 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 56 [2020-12-23 07:09:24,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:24,731 INFO L225 Difference]: With dead ends: 74 [2020-12-23 07:09:24,731 INFO L226 Difference]: Without dead ends: 59 [2020-12-23 07:09:24,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-23 07:09:24,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-23 07:09:24,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-12-23 07:09:24,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-23 07:09:24,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2020-12-23 07:09:24,751 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 56 [2020-12-23 07:09:24,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:24,751 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2020-12-23 07:09:24,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 07:09:24,752 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2020-12-23 07:09:24,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-23 07:09:24,752 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:24,752 INFO L422 BasicCegarLoop]: trace histogram [26, 21, 5, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:24,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-23 07:09:24,968 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:24,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:24,969 INFO L82 PathProgramCache]: Analyzing trace with hash -575792311, now seen corresponding path program 18 times [2020-12-23 07:09:24,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:24,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137654123] [2020-12-23 07:09:24,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:24,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:25,328 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 198 proven. 462 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-23 07:09:25,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137654123] [2020-12-23 07:09:25,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331985635] [2020-12-23 07:09:25,329 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:25,399 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2020-12-23 07:09:25,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:25,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 07:09:25,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:25,616 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 231 proven. 25 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-12-23 07:09:25,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:25,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 8] total 30 [2020-12-23 07:09:25,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025535298] [2020-12-23 07:09:25,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 07:09:25,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:25,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 07:09:25,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-23 07:09:25,618 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand 30 states. [2020-12-23 07:09:25,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:25,760 INFO L93 Difference]: Finished difference Result 79 states and 93 transitions. [2020-12-23 07:09:25,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 07:09:25,761 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2020-12-23 07:09:25,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:25,763 INFO L225 Difference]: With dead ends: 79 [2020-12-23 07:09:25,763 INFO L226 Difference]: Without dead ends: 64 [2020-12-23 07:09:25,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-23 07:09:25,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-23 07:09:25,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-12-23 07:09:25,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-23 07:09:25,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions. [2020-12-23 07:09:25,770 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 58 [2020-12-23 07:09:25,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:25,770 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 69 transitions. [2020-12-23 07:09:25,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 07:09:25,770 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions. [2020-12-23 07:09:25,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-23 07:09:25,771 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:25,771 INFO L422 BasicCegarLoop]: trace histogram [28, 22, 6, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:25,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:25,985 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:25,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:25,986 INFO L82 PathProgramCache]: Analyzing trace with hash -429571503, now seen corresponding path program 19 times [2020-12-23 07:09:25,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:25,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385746469] [2020-12-23 07:09:25,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:26,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:26,320 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 253 proven. 506 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-23 07:09:26,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385746469] [2020-12-23 07:09:26,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879765667] [2020-12-23 07:09:26,321 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:26,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:26,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 07:09:26,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:26,460 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 253 proven. 506 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-23 07:09:26,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:26,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-23 07:09:26,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725483427] [2020-12-23 07:09:26,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 07:09:26,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:26,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 07:09:26,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-23 07:09:26,462 INFO L87 Difference]: Start difference. First operand 63 states and 69 transitions. Second operand 26 states. [2020-12-23 07:09:26,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:26,552 INFO L93 Difference]: Finished difference Result 82 states and 95 transitions. [2020-12-23 07:09:26,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 07:09:26,553 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 62 [2020-12-23 07:09:26,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:26,553 INFO L225 Difference]: With dead ends: 82 [2020-12-23 07:09:26,553 INFO L226 Difference]: Without dead ends: 65 [2020-12-23 07:09:26,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-23 07:09:26,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-23 07:09:26,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-12-23 07:09:26,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-23 07:09:26,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2020-12-23 07:09:26,558 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 62 [2020-12-23 07:09:26,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:26,558 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2020-12-23 07:09:26,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 07:09:26,558 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2020-12-23 07:09:26,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-23 07:09:26,559 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:26,559 INFO L422 BasicCegarLoop]: trace histogram [29, 23, 6, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:26,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 07:09:26,773 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:26,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:26,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1139183732, now seen corresponding path program 20 times [2020-12-23 07:09:26,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:26,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457982286] [2020-12-23 07:09:26,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:26,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:27,173 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 264 proven. 552 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-23 07:09:27,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457982286] [2020-12-23 07:09:27,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119456919] [2020-12-23 07:09:27,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:27,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:09:27,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:27,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 07:09:27,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:27,312 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 264 proven. 552 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-23 07:09:27,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:27,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-23 07:09:27,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746296296] [2020-12-23 07:09:27,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 07:09:27,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:27,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 07:09:27,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-23 07:09:27,314 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand 27 states. [2020-12-23 07:09:27,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:27,433 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2020-12-23 07:09:27,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 07:09:27,434 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 64 [2020-12-23 07:09:27,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:27,434 INFO L225 Difference]: With dead ends: 84 [2020-12-23 07:09:27,434 INFO L226 Difference]: Without dead ends: 67 [2020-12-23 07:09:27,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-23 07:09:27,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-23 07:09:27,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-12-23 07:09:27,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-23 07:09:27,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2020-12-23 07:09:27,439 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 64 [2020-12-23 07:09:27,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:27,439 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2020-12-23 07:09:27,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 07:09:27,439 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2020-12-23 07:09:27,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-23 07:09:27,440 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:27,440 INFO L422 BasicCegarLoop]: trace histogram [30, 24, 6, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:27,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 07:09:27,646 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:27,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:27,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1179443671, now seen corresponding path program 21 times [2020-12-23 07:09:27,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:27,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019301154] [2020-12-23 07:09:27,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:27,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:28,101 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 275 proven. 600 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-23 07:09:28,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019301154] [2020-12-23 07:09:28,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650837794] [2020-12-23 07:09:28,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:28,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-12-23 07:09:28,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:28,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 07:09:28,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:28,432 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 312 proven. 36 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2020-12-23 07:09:28,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:28,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 9] total 34 [2020-12-23 07:09:28,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210566508] [2020-12-23 07:09:28,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 07:09:28,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:28,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 07:09:28,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 07:09:28,435 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand 34 states. [2020-12-23 07:09:28,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:28,589 INFO L93 Difference]: Finished difference Result 89 states and 105 transitions. [2020-12-23 07:09:28,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 07:09:28,589 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2020-12-23 07:09:28,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:28,590 INFO L225 Difference]: With dead ends: 89 [2020-12-23 07:09:28,590 INFO L226 Difference]: Without dead ends: 72 [2020-12-23 07:09:28,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 07:09:28,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-23 07:09:28,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-12-23 07:09:28,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-23 07:09:28,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2020-12-23 07:09:28,598 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 66 [2020-12-23 07:09:28,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:28,598 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2020-12-23 07:09:28,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 07:09:28,599 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2020-12-23 07:09:28,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-23 07:09:28,599 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:28,599 INFO L422 BasicCegarLoop]: trace histogram [32, 25, 7, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:28,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:28,814 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:28,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:28,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1006564769, now seen corresponding path program 22 times [2020-12-23 07:09:28,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:28,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318602114] [2020-12-23 07:09:28,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:28,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:29,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 338 proven. 650 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-23 07:09:29,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318602114] [2020-12-23 07:09:29,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664464111] [2020-12-23 07:09:29,266 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:29,321 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:09:29,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:29,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 07:09:29,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:29,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 338 proven. 650 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-23 07:09:29,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:29,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-23 07:09:29,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754230121] [2020-12-23 07:09:29,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 07:09:29,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:29,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 07:09:29,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-23 07:09:29,425 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand 29 states. [2020-12-23 07:09:29,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:29,540 INFO L93 Difference]: Finished difference Result 92 states and 107 transitions. [2020-12-23 07:09:29,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 07:09:29,540 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 70 [2020-12-23 07:09:29,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:29,541 INFO L225 Difference]: With dead ends: 92 [2020-12-23 07:09:29,541 INFO L226 Difference]: Without dead ends: 73 [2020-12-23 07:09:29,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-23 07:09:29,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-23 07:09:29,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-12-23 07:09:29,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-23 07:09:29,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 80 transitions. [2020-12-23 07:09:29,548 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 80 transitions. Word has length 70 [2020-12-23 07:09:29,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:29,548 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 80 transitions. [2020-12-23 07:09:29,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 07:09:29,548 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 80 transitions. [2020-12-23 07:09:29,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-23 07:09:29,549 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:29,549 INFO L422 BasicCegarLoop]: trace histogram [33, 26, 7, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:29,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 07:09:29,764 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:29,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:29,765 INFO L82 PathProgramCache]: Analyzing trace with hash 800032130, now seen corresponding path program 23 times [2020-12-23 07:09:29,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:29,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615564183] [2020-12-23 07:09:29,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:29,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:30,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 351 proven. 702 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-23 07:09:30,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615564183] [2020-12-23 07:09:30,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370622184] [2020-12-23 07:09:30,301 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:30,383 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2020-12-23 07:09:30,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:30,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 07:09:30,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:30,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 351 proven. 702 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-23 07:09:30,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:30,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-23 07:09:30,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383683082] [2020-12-23 07:09:30,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 07:09:30,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:30,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 07:09:30,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-23 07:09:30,511 INFO L87 Difference]: Start difference. First operand 73 states and 80 transitions. Second operand 30 states. [2020-12-23 07:09:30,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:30,625 INFO L93 Difference]: Finished difference Result 94 states and 109 transitions. [2020-12-23 07:09:30,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 07:09:30,626 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 72 [2020-12-23 07:09:30,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:30,627 INFO L225 Difference]: With dead ends: 94 [2020-12-23 07:09:30,627 INFO L226 Difference]: Without dead ends: 75 [2020-12-23 07:09:30,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-23 07:09:30,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-23 07:09:30,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-12-23 07:09:30,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-23 07:09:30,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2020-12-23 07:09:30,631 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 72 [2020-12-23 07:09:30,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:30,631 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2020-12-23 07:09:30,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 07:09:30,632 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2020-12-23 07:09:30,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-23 07:09:30,632 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:30,632 INFO L422 BasicCegarLoop]: trace histogram [34, 27, 7, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:30,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:30,847 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:30,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:30,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1772864485, now seen corresponding path program 24 times [2020-12-23 07:09:30,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:30,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057635376] [2020-12-23 07:09:30,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:30,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:31,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 364 proven. 756 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-23 07:09:31,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057635376] [2020-12-23 07:09:31,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240096281] [2020-12-23 07:09:31,334 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:31,422 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2020-12-23 07:09:31,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:31,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 07:09:31,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:31,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 405 proven. 49 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2020-12-23 07:09:31,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:31,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 10] total 38 [2020-12-23 07:09:31,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030503766] [2020-12-23 07:09:31,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-23 07:09:31,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:31,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-23 07:09:31,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 07:09:31,760 INFO L87 Difference]: Start difference. First operand 75 states and 82 transitions. Second operand 38 states. [2020-12-23 07:09:31,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:31,909 INFO L93 Difference]: Finished difference Result 99 states and 117 transitions. [2020-12-23 07:09:31,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-23 07:09:31,909 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2020-12-23 07:09:31,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:31,910 INFO L225 Difference]: With dead ends: 99 [2020-12-23 07:09:31,910 INFO L226 Difference]: Without dead ends: 80 [2020-12-23 07:09:31,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 07:09:31,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-23 07:09:31,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-12-23 07:09:31,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-23 07:09:31,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 87 transitions. [2020-12-23 07:09:31,915 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 87 transitions. Word has length 74 [2020-12-23 07:09:31,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:31,915 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 87 transitions. [2020-12-23 07:09:31,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-23 07:09:31,916 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 87 transitions. [2020-12-23 07:09:31,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-23 07:09:31,916 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:31,916 INFO L422 BasicCegarLoop]: trace histogram [36, 28, 8, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:32,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 07:09:32,117 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:32,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:32,118 INFO L82 PathProgramCache]: Analyzing trace with hash -66646547, now seen corresponding path program 25 times [2020-12-23 07:09:32,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:32,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096296646] [2020-12-23 07:09:32,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:32,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:32,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 435 proven. 812 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-12-23 07:09:32,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096296646] [2020-12-23 07:09:32,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278670844] [2020-12-23 07:09:32,707 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:32,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:32,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 07:09:32,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:32,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 435 proven. 812 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-12-23 07:09:32,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:32,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-12-23 07:09:32,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462898515] [2020-12-23 07:09:32,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 07:09:32,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:32,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 07:09:32,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-23 07:09:32,871 INFO L87 Difference]: Start difference. First operand 79 states and 87 transitions. Second operand 32 states. [2020-12-23 07:09:32,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:32,990 INFO L93 Difference]: Finished difference Result 102 states and 119 transitions. [2020-12-23 07:09:32,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 07:09:32,991 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 78 [2020-12-23 07:09:32,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:32,992 INFO L225 Difference]: With dead ends: 102 [2020-12-23 07:09:32,992 INFO L226 Difference]: Without dead ends: 81 [2020-12-23 07:09:32,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-23 07:09:32,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-23 07:09:32,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-12-23 07:09:32,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-23 07:09:32,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2020-12-23 07:09:32,998 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 78 [2020-12-23 07:09:32,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:32,998 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2020-12-23 07:09:32,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 07:09:32,998 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2020-12-23 07:09:33,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-23 07:09:33,002 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:33,002 INFO L422 BasicCegarLoop]: trace histogram [37, 29, 8, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:33,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 07:09:33,217 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:33,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:33,218 INFO L82 PathProgramCache]: Analyzing trace with hash 6665744, now seen corresponding path program 26 times [2020-12-23 07:09:33,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:33,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434168085] [2020-12-23 07:09:33,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:33,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:33,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 450 proven. 870 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-12-23 07:09:33,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434168085] [2020-12-23 07:09:33,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277852151] [2020-12-23 07:09:33,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:33,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:09:33,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:33,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 07:09:33,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:33,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 450 proven. 870 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-12-23 07:09:33,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:33,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-12-23 07:09:33,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978555824] [2020-12-23 07:09:33,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 07:09:33,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:33,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 07:09:33,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 07:09:33,931 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand 33 states. [2020-12-23 07:09:34,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:34,062 INFO L93 Difference]: Finished difference Result 104 states and 121 transitions. [2020-12-23 07:09:34,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 07:09:34,063 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 80 [2020-12-23 07:09:34,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:34,063 INFO L225 Difference]: With dead ends: 104 [2020-12-23 07:09:34,063 INFO L226 Difference]: Without dead ends: 83 [2020-12-23 07:09:34,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 07:09:34,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-23 07:09:34,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-12-23 07:09:34,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-23 07:09:34,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2020-12-23 07:09:34,068 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 80 [2020-12-23 07:09:34,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:34,068 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2020-12-23 07:09:34,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 07:09:34,068 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2020-12-23 07:09:34,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-23 07:09:34,069 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:34,069 INFO L422 BasicCegarLoop]: trace histogram [38, 30, 8, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:34,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:34,284 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:34,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:34,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1740300659, now seen corresponding path program 27 times [2020-12-23 07:09:34,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:34,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941356820] [2020-12-23 07:09:34,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:34,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:34,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 465 proven. 930 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-12-23 07:09:34,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941356820] [2020-12-23 07:09:34,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108657270] [2020-12-23 07:09:34,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:34,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2020-12-23 07:09:34,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:34,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 07:09:34,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:35,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 510 proven. 64 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2020-12-23 07:09:35,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:35,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 11] total 42 [2020-12-23 07:09:35,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621560578] [2020-12-23 07:09:35,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-23 07:09:35,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:35,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-23 07:09:35,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 07:09:35,402 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand 42 states. [2020-12-23 07:09:35,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:35,591 INFO L93 Difference]: Finished difference Result 109 states and 129 transitions. [2020-12-23 07:09:35,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-23 07:09:35,592 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2020-12-23 07:09:35,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:35,593 INFO L225 Difference]: With dead ends: 109 [2020-12-23 07:09:35,593 INFO L226 Difference]: Without dead ends: 88 [2020-12-23 07:09:35,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 07:09:35,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-23 07:09:35,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-12-23 07:09:35,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-23 07:09:35,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 96 transitions. [2020-12-23 07:09:35,597 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 96 transitions. Word has length 82 [2020-12-23 07:09:35,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:35,598 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 96 transitions. [2020-12-23 07:09:35,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-23 07:09:35,598 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 96 transitions. [2020-12-23 07:09:35,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-23 07:09:35,599 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:35,599 INFO L422 BasicCegarLoop]: trace histogram [40, 31, 9, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:35,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:35,814 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:35,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:35,815 INFO L82 PathProgramCache]: Analyzing trace with hash 2145348859, now seen corresponding path program 28 times [2020-12-23 07:09:35,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:35,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144013008] [2020-12-23 07:09:35,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:35,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:36,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 544 proven. 992 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-23 07:09:36,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144013008] [2020-12-23 07:09:36,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334991764] [2020-12-23 07:09:36,425 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:36,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:09:36,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:36,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 07:09:36,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:36,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 544 proven. 992 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-23 07:09:36,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:36,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-12-23 07:09:36,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085378344] [2020-12-23 07:09:36,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-23 07:09:36,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:36,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-23 07:09:36,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 07:09:36,585 INFO L87 Difference]: Start difference. First operand 87 states and 96 transitions. Second operand 35 states. [2020-12-23 07:09:36,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:36,720 INFO L93 Difference]: Finished difference Result 112 states and 131 transitions. [2020-12-23 07:09:36,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 07:09:36,721 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 86 [2020-12-23 07:09:36,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:36,721 INFO L225 Difference]: With dead ends: 112 [2020-12-23 07:09:36,722 INFO L226 Difference]: Without dead ends: 89 [2020-12-23 07:09:36,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 07:09:36,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-23 07:09:36,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-12-23 07:09:36,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-23 07:09:36,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 98 transitions. [2020-12-23 07:09:36,726 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 98 transitions. Word has length 86 [2020-12-23 07:09:36,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:36,727 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 98 transitions. [2020-12-23 07:09:36,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-23 07:09:36,727 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 98 transitions. [2020-12-23 07:09:36,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-23 07:09:36,728 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:36,728 INFO L422 BasicCegarLoop]: trace histogram [41, 32, 9, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:36,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-12-23 07:09:36,943 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:36,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:36,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1953579550, now seen corresponding path program 29 times [2020-12-23 07:09:36,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:36,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011123271] [2020-12-23 07:09:36,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:36,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:37,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 561 proven. 1056 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-23 07:09:37,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011123271] [2020-12-23 07:09:37,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96659030] [2020-12-23 07:09:37,629 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:37,705 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2020-12-23 07:09:37,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:37,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 07:09:37,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:37,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 561 proven. 1056 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-23 07:09:37,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:37,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-12-23 07:09:37,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835533673] [2020-12-23 07:09:37,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-23 07:09:37,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:37,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-23 07:09:37,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 07:09:37,826 INFO L87 Difference]: Start difference. First operand 89 states and 98 transitions. Second operand 36 states. [2020-12-23 07:09:37,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:37,967 INFO L93 Difference]: Finished difference Result 114 states and 133 transitions. [2020-12-23 07:09:37,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-23 07:09:37,970 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 88 [2020-12-23 07:09:37,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:37,971 INFO L225 Difference]: With dead ends: 114 [2020-12-23 07:09:37,971 INFO L226 Difference]: Without dead ends: 91 [2020-12-23 07:09:37,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 07:09:37,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-23 07:09:37,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-12-23 07:09:37,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-23 07:09:37,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2020-12-23 07:09:37,975 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 88 [2020-12-23 07:09:37,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:37,976 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2020-12-23 07:09:37,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-23 07:09:37,976 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2020-12-23 07:09:37,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-23 07:09:37,977 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:37,977 INFO L422 BasicCegarLoop]: trace histogram [42, 33, 9, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:38,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:38,191 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:38,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:38,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1948099967, now seen corresponding path program 30 times [2020-12-23 07:09:38,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:38,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573888806] [2020-12-23 07:09:38,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:38,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:38,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 578 proven. 1122 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-23 07:09:38,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573888806] [2020-12-23 07:09:38,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868004666] [2020-12-23 07:09:38,951 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:39,043 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 39 check-sat command(s) [2020-12-23 07:09:39,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:39,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 07:09:39,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:39,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 627 proven. 81 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2020-12-23 07:09:39,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:39,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 12] total 46 [2020-12-23 07:09:39,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570822983] [2020-12-23 07:09:39,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-23 07:09:39,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:39,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-23 07:09:39,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 07:09:39,625 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand 46 states. [2020-12-23 07:09:39,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:39,835 INFO L93 Difference]: Finished difference Result 119 states and 141 transitions. [2020-12-23 07:09:39,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-23 07:09:39,836 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2020-12-23 07:09:39,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:39,837 INFO L225 Difference]: With dead ends: 119 [2020-12-23 07:09:39,837 INFO L226 Difference]: Without dead ends: 96 [2020-12-23 07:09:39,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 07:09:39,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-23 07:09:39,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-12-23 07:09:39,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-12-23 07:09:39,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 105 transitions. [2020-12-23 07:09:39,841 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 105 transitions. Word has length 90 [2020-12-23 07:09:39,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:39,842 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 105 transitions. [2020-12-23 07:09:39,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-23 07:09:39,842 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 105 transitions. [2020-12-23 07:09:39,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-23 07:09:39,843 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:39,843 INFO L422 BasicCegarLoop]: trace histogram [44, 34, 10, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:40,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-23 07:09:40,055 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:40,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:40,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1852458889, now seen corresponding path program 31 times [2020-12-23 07:09:40,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:40,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213890066] [2020-12-23 07:09:40,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:40,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:40,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 665 proven. 1190 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-12-23 07:09:40,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213890066] [2020-12-23 07:09:40,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121899455] [2020-12-23 07:09:40,819 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:40,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:40,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 07:09:40,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:40,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 665 proven. 1190 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-12-23 07:09:40,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:40,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-12-23 07:09:40,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989092018] [2020-12-23 07:09:40,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-23 07:09:40,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:40,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-23 07:09:40,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 07:09:40,997 INFO L87 Difference]: Start difference. First operand 95 states and 105 transitions. Second operand 38 states. [2020-12-23 07:09:41,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:41,165 INFO L93 Difference]: Finished difference Result 122 states and 143 transitions. [2020-12-23 07:09:41,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 07:09:41,166 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 94 [2020-12-23 07:09:41,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:41,168 INFO L225 Difference]: With dead ends: 122 [2020-12-23 07:09:41,168 INFO L226 Difference]: Without dead ends: 97 [2020-12-23 07:09:41,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 07:09:41,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-12-23 07:09:41,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-12-23 07:09:41,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-23 07:09:41,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 107 transitions. [2020-12-23 07:09:41,172 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 107 transitions. Word has length 94 [2020-12-23 07:09:41,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:41,173 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 107 transitions. [2020-12-23 07:09:41,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-23 07:09:41,173 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 107 transitions. [2020-12-23 07:09:41,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-23 07:09:41,174 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:41,174 INFO L422 BasicCegarLoop]: trace histogram [45, 35, 10, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:41,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-23 07:09:41,387 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:41,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:41,388 INFO L82 PathProgramCache]: Analyzing trace with hash 2008172972, now seen corresponding path program 32 times [2020-12-23 07:09:41,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:41,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742231908] [2020-12-23 07:09:41,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:41,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:42,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 684 proven. 1260 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-12-23 07:09:42,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742231908] [2020-12-23 07:09:42,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927245260] [2020-12-23 07:09:42,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:42,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:09:42,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:42,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-23 07:09:42,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:42,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 684 proven. 1260 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-12-23 07:09:42,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:42,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-12-23 07:09:42,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201703261] [2020-12-23 07:09:42,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-23 07:09:42,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:42,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-23 07:09:42,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 07:09:42,399 INFO L87 Difference]: Start difference. First operand 97 states and 107 transitions. Second operand 39 states. [2020-12-23 07:09:42,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:42,577 INFO L93 Difference]: Finished difference Result 124 states and 145 transitions. [2020-12-23 07:09:42,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-23 07:09:42,578 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 96 [2020-12-23 07:09:42,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:42,580 INFO L225 Difference]: With dead ends: 124 [2020-12-23 07:09:42,580 INFO L226 Difference]: Without dead ends: 99 [2020-12-23 07:09:42,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 07:09:42,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-12-23 07:09:42,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-12-23 07:09:42,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-23 07:09:42,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2020-12-23 07:09:42,586 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 96 [2020-12-23 07:09:42,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:42,587 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2020-12-23 07:09:42,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-23 07:09:42,587 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2020-12-23 07:09:42,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-23 07:09:42,588 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:42,588 INFO L422 BasicCegarLoop]: trace histogram [46, 36, 10, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:42,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-23 07:09:42,802 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:42,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:42,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1325551375, now seen corresponding path program 33 times [2020-12-23 07:09:42,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:42,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725205564] [2020-12-23 07:09:42,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:42,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:43,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 703 proven. 1332 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-12-23 07:09:43,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725205564] [2020-12-23 07:09:43,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124333496] [2020-12-23 07:09:43,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:43,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-12-23 07:09:43,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:43,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 07:09:43,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:44,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 756 proven. 100 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2020-12-23 07:09:44,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:44,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 13] total 50 [2020-12-23 07:09:44,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237308202] [2020-12-23 07:09:44,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-23 07:09:44,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:44,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-23 07:09:44,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 07:09:44,315 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand 50 states. [2020-12-23 07:09:44,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:44,559 INFO L93 Difference]: Finished difference Result 129 states and 153 transitions. [2020-12-23 07:09:44,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-23 07:09:44,559 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2020-12-23 07:09:44,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:44,560 INFO L225 Difference]: With dead ends: 129 [2020-12-23 07:09:44,560 INFO L226 Difference]: Without dead ends: 104 [2020-12-23 07:09:44,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 07:09:44,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-23 07:09:44,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-12-23 07:09:44,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-12-23 07:09:44,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 114 transitions. [2020-12-23 07:09:44,565 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 114 transitions. Word has length 98 [2020-12-23 07:09:44,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:44,565 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 114 transitions. [2020-12-23 07:09:44,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-23 07:09:44,565 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 114 transitions. [2020-12-23 07:09:44,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-12-23 07:09:44,566 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:44,566 INFO L422 BasicCegarLoop]: trace histogram [48, 37, 11, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:44,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-23 07:09:44,781 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:44,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:44,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1778401897, now seen corresponding path program 34 times [2020-12-23 07:09:44,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:44,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833270528] [2020-12-23 07:09:44,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:44,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:45,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 798 proven. 1406 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 07:09:45,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833270528] [2020-12-23 07:09:45,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023618112] [2020-12-23 07:09:45,707 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:45,773 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:09:45,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:45,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-23 07:09:45,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:45,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 798 proven. 1406 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 07:09:45,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:45,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-12-23 07:09:45,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900445468] [2020-12-23 07:09:45,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-23 07:09:45,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:45,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-23 07:09:45,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 07:09:45,912 INFO L87 Difference]: Start difference. First operand 103 states and 114 transitions. Second operand 41 states. [2020-12-23 07:09:46,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:46,075 INFO L93 Difference]: Finished difference Result 132 states and 155 transitions. [2020-12-23 07:09:46,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 07:09:46,075 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 102 [2020-12-23 07:09:46,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:46,076 INFO L225 Difference]: With dead ends: 132 [2020-12-23 07:09:46,076 INFO L226 Difference]: Without dead ends: 105 [2020-12-23 07:09:46,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 07:09:46,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-12-23 07:09:46,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2020-12-23 07:09:46,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-12-23 07:09:46,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 116 transitions. [2020-12-23 07:09:46,081 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 116 transitions. Word has length 102 [2020-12-23 07:09:46,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:46,082 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 116 transitions. [2020-12-23 07:09:46,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-23 07:09:46,082 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 116 transitions. [2020-12-23 07:09:46,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-23 07:09:46,082 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:46,083 INFO L422 BasicCegarLoop]: trace histogram [49, 38, 11, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:46,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-23 07:09:46,298 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:46,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:46,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1518277446, now seen corresponding path program 35 times [2020-12-23 07:09:46,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:46,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550160293] [2020-12-23 07:09:46,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:46,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:47,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 819 proven. 1482 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 07:09:47,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550160293] [2020-12-23 07:09:47,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064687457] [2020-12-23 07:09:47,202 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:47,299 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 50 check-sat command(s) [2020-12-23 07:09:47,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:47,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-23 07:09:47,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:47,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 819 proven. 1482 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 07:09:47,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:47,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-12-23 07:09:47,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925187486] [2020-12-23 07:09:47,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-23 07:09:47,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:47,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-23 07:09:47,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 07:09:47,428 INFO L87 Difference]: Start difference. First operand 105 states and 116 transitions. Second operand 42 states. [2020-12-23 07:09:47,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:47,591 INFO L93 Difference]: Finished difference Result 134 states and 157 transitions. [2020-12-23 07:09:47,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-23 07:09:47,592 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 104 [2020-12-23 07:09:47,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:47,593 INFO L225 Difference]: With dead ends: 134 [2020-12-23 07:09:47,593 INFO L226 Difference]: Without dead ends: 107 [2020-12-23 07:09:47,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 07:09:47,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-12-23 07:09:47,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-12-23 07:09:47,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-12-23 07:09:47,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 118 transitions. [2020-12-23 07:09:47,598 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 118 transitions. Word has length 104 [2020-12-23 07:09:47,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:47,599 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 118 transitions. [2020-12-23 07:09:47,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-23 07:09:47,599 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 118 transitions. [2020-12-23 07:09:47,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-23 07:09:47,600 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:47,600 INFO L422 BasicCegarLoop]: trace histogram [50, 39, 11, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:47,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-23 07:09:47,815 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:47,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:47,816 INFO L82 PathProgramCache]: Analyzing trace with hash -646783203, now seen corresponding path program 36 times [2020-12-23 07:09:47,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:47,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105985548] [2020-12-23 07:09:47,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:47,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:48,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 840 proven. 1560 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 07:09:48,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105985548] [2020-12-23 07:09:48,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874370001] [2020-12-23 07:09:48,882 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:48,992 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2020-12-23 07:09:48,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:48,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 07:09:48,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:49,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 897 proven. 121 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2020-12-23 07:09:49,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:49,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 14] total 54 [2020-12-23 07:09:49,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985761649] [2020-12-23 07:09:49,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-23 07:09:49,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:49,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-23 07:09:49,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 07:09:49,782 INFO L87 Difference]: Start difference. First operand 107 states and 118 transitions. Second operand 54 states. [2020-12-23 07:09:50,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:50,078 INFO L93 Difference]: Finished difference Result 139 states and 165 transitions. [2020-12-23 07:09:50,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-23 07:09:50,079 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2020-12-23 07:09:50,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:50,080 INFO L225 Difference]: With dead ends: 139 [2020-12-23 07:09:50,080 INFO L226 Difference]: Without dead ends: 112 [2020-12-23 07:09:50,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 07:09:50,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-12-23 07:09:50,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2020-12-23 07:09:50,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-12-23 07:09:50,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 123 transitions. [2020-12-23 07:09:50,086 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 123 transitions. Word has length 106 [2020-12-23 07:09:50,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:50,086 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 123 transitions. [2020-12-23 07:09:50,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-23 07:09:50,087 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 123 transitions. [2020-12-23 07:09:50,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-23 07:09:50,087 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:50,087 INFO L422 BasicCegarLoop]: trace histogram [52, 40, 12, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:50,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-23 07:09:50,302 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:50,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:50,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1987047205, now seen corresponding path program 37 times [2020-12-23 07:09:50,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:50,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254971469] [2020-12-23 07:09:50,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:50,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:51,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 943 proven. 1640 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-23 07:09:51,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254971469] [2020-12-23 07:09:51,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963831224] [2020-12-23 07:09:51,392 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:51,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:51,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-23 07:09:51,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:51,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 943 proven. 1640 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-23 07:09:51,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:51,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2020-12-23 07:09:51,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572013903] [2020-12-23 07:09:51,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-23 07:09:51,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:51,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-23 07:09:51,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 07:09:51,595 INFO L87 Difference]: Start difference. First operand 111 states and 123 transitions. Second operand 44 states. [2020-12-23 07:09:51,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:51,724 INFO L93 Difference]: Finished difference Result 142 states and 167 transitions. [2020-12-23 07:09:51,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-23 07:09:51,725 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 110 [2020-12-23 07:09:51,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:51,726 INFO L225 Difference]: With dead ends: 142 [2020-12-23 07:09:51,726 INFO L226 Difference]: Without dead ends: 113 [2020-12-23 07:09:51,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 07:09:51,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-12-23 07:09:51,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2020-12-23 07:09:51,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-12-23 07:09:51,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 125 transitions. [2020-12-23 07:09:51,733 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 125 transitions. Word has length 110 [2020-12-23 07:09:51,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:51,733 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 125 transitions. [2020-12-23 07:09:51,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-23 07:09:51,733 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 125 transitions. [2020-12-23 07:09:51,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-23 07:09:51,734 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:51,734 INFO L422 BasicCegarLoop]: trace histogram [53, 41, 12, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:51,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:51,945 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:51,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:51,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1252870984, now seen corresponding path program 38 times [2020-12-23 07:09:51,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:51,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9242205] [2020-12-23 07:09:51,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:51,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:53,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 966 proven. 1722 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-23 07:09:53,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9242205] [2020-12-23 07:09:53,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835926373] [2020-12-23 07:09:53,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:53,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:09:53,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:53,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-23 07:09:53,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:53,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 966 proven. 1722 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-23 07:09:53,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:53,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2020-12-23 07:09:53,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035216620] [2020-12-23 07:09:53,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-23 07:09:53,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:53,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-23 07:09:53,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 07:09:53,230 INFO L87 Difference]: Start difference. First operand 113 states and 125 transitions. Second operand 45 states. [2020-12-23 07:09:53,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:53,423 INFO L93 Difference]: Finished difference Result 144 states and 169 transitions. [2020-12-23 07:09:53,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-23 07:09:53,424 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 112 [2020-12-23 07:09:53,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:53,425 INFO L225 Difference]: With dead ends: 144 [2020-12-23 07:09:53,425 INFO L226 Difference]: Without dead ends: 115 [2020-12-23 07:09:53,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 07:09:53,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-12-23 07:09:53,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2020-12-23 07:09:53,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-12-23 07:09:53,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 127 transitions. [2020-12-23 07:09:53,430 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 127 transitions. Word has length 112 [2020-12-23 07:09:53,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:53,430 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 127 transitions. [2020-12-23 07:09:53,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-23 07:09:53,430 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 127 transitions. [2020-12-23 07:09:53,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-23 07:09:53,431 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:53,431 INFO L422 BasicCegarLoop]: trace histogram [54, 42, 12, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:53,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:53,632 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:53,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:53,633 INFO L82 PathProgramCache]: Analyzing trace with hash 84159147, now seen corresponding path program 39 times [2020-12-23 07:09:53,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:53,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320520759] [2020-12-23 07:09:53,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:53,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:54,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 989 proven. 1806 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-23 07:09:54,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320520759] [2020-12-23 07:09:54,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631932505] [2020-12-23 07:09:54,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:54,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2020-12-23 07:09:54,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:54,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 07:09:54,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:55,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1050 proven. 144 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2020-12-23 07:09:55,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:55,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 15] total 58 [2020-12-23 07:09:55,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178761759] [2020-12-23 07:09:55,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-12-23 07:09:55,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:55,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-12-23 07:09:55,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-12-23 07:09:55,834 INFO L87 Difference]: Start difference. First operand 115 states and 127 transitions. Second operand 58 states. [2020-12-23 07:09:56,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:56,146 INFO L93 Difference]: Finished difference Result 149 states and 177 transitions. [2020-12-23 07:09:56,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-12-23 07:09:56,146 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2020-12-23 07:09:56,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:56,147 INFO L225 Difference]: With dead ends: 149 [2020-12-23 07:09:56,148 INFO L226 Difference]: Without dead ends: 120 [2020-12-23 07:09:56,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-12-23 07:09:56,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-12-23 07:09:56,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2020-12-23 07:09:56,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-12-23 07:09:56,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 132 transitions. [2020-12-23 07:09:56,153 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 132 transitions. Word has length 114 [2020-12-23 07:09:56,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:56,154 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 132 transitions. [2020-12-23 07:09:56,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-12-23 07:09:56,154 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 132 transitions. [2020-12-23 07:09:56,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-12-23 07:09:56,155 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:56,155 INFO L422 BasicCegarLoop]: trace histogram [56, 43, 13, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:56,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:56,370 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:56,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:56,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1023214541, now seen corresponding path program 40 times [2020-12-23 07:09:56,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:56,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676333858] [2020-12-23 07:09:56,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:56,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:57,598 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1100 proven. 1892 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-12-23 07:09:57,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676333858] [2020-12-23 07:09:57,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482271056] [2020-12-23 07:09:57,598 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:57,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:09:57,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:57,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-23 07:09:57,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:57,810 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1100 proven. 1892 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-12-23 07:09:57,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:57,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2020-12-23 07:09:57,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214805285] [2020-12-23 07:09:57,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-23 07:09:57,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:57,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-23 07:09:57,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 07:09:57,812 INFO L87 Difference]: Start difference. First operand 119 states and 132 transitions. Second operand 47 states. [2020-12-23 07:09:57,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:57,954 INFO L93 Difference]: Finished difference Result 152 states and 179 transitions. [2020-12-23 07:09:57,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-23 07:09:57,954 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 118 [2020-12-23 07:09:57,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:57,955 INFO L225 Difference]: With dead ends: 152 [2020-12-23 07:09:57,956 INFO L226 Difference]: Without dead ends: 121 [2020-12-23 07:09:57,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 07:09:57,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-12-23 07:09:57,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2020-12-23 07:09:57,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-12-23 07:09:57,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 134 transitions. [2020-12-23 07:09:57,961 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 134 transitions. Word has length 118 [2020-12-23 07:09:57,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:57,961 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 134 transitions. [2020-12-23 07:09:57,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-23 07:09:57,961 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 134 transitions. [2020-12-23 07:09:57,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-12-23 07:09:57,962 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:57,962 INFO L422 BasicCegarLoop]: trace histogram [57, 44, 13, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:58,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-12-23 07:09:58,176 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:58,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:58,177 INFO L82 PathProgramCache]: Analyzing trace with hash -411073194, now seen corresponding path program 41 times [2020-12-23 07:09:58,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:58,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060146752] [2020-12-23 07:09:58,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:58,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:59,430 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 1125 proven. 1980 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-12-23 07:09:59,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060146752] [2020-12-23 07:09:59,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288735962] [2020-12-23 07:09:59,430 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:59,526 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 58 check-sat command(s) [2020-12-23 07:09:59,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:59,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-23 07:09:59,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:59,667 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 1125 proven. 1980 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-12-23 07:09:59,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:59,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2020-12-23 07:09:59,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289045562] [2020-12-23 07:09:59,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-23 07:09:59,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:59,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-23 07:09:59,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 07:09:59,670 INFO L87 Difference]: Start difference. First operand 121 states and 134 transitions. Second operand 48 states. [2020-12-23 07:09:59,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:59,884 INFO L93 Difference]: Finished difference Result 154 states and 181 transitions. [2020-12-23 07:09:59,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-23 07:09:59,884 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 120 [2020-12-23 07:09:59,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:59,885 INFO L225 Difference]: With dead ends: 154 [2020-12-23 07:09:59,886 INFO L226 Difference]: Without dead ends: 123 [2020-12-23 07:09:59,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 07:09:59,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-12-23 07:09:59,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2020-12-23 07:09:59,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-12-23 07:09:59,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 136 transitions. [2020-12-23 07:09:59,891 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 136 transitions. Word has length 120 [2020-12-23 07:09:59,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:59,891 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 136 transitions. [2020-12-23 07:09:59,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-23 07:09:59,891 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 136 transitions. [2020-12-23 07:09:59,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-12-23 07:09:59,892 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:59,892 INFO L422 BasicCegarLoop]: trace histogram [58, 45, 13, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:00,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:00,105 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:00,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:00,106 INFO L82 PathProgramCache]: Analyzing trace with hash -553758279, now seen corresponding path program 42 times [2020-12-23 07:10:00,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:00,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607658931] [2020-12-23 07:10:00,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:00,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:01,423 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 1150 proven. 2070 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-12-23 07:10:01,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607658931] [2020-12-23 07:10:01,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628064739] [2020-12-23 07:10:01,423 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:01,561 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2020-12-23 07:10:01,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:01,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 07:10:01,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:02,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 1215 proven. 169 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2020-12-23 07:10:02,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:02,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 16] total 62 [2020-12-23 07:10:02,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619255878] [2020-12-23 07:10:02,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-12-23 07:10:02,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:02,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-12-23 07:10:02,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2020-12-23 07:10:02,639 INFO L87 Difference]: Start difference. First operand 123 states and 136 transitions. Second operand 62 states. [2020-12-23 07:10:02,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:02,947 INFO L93 Difference]: Finished difference Result 159 states and 189 transitions. [2020-12-23 07:10:02,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-12-23 07:10:02,947 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 122 [2020-12-23 07:10:02,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:02,949 INFO L225 Difference]: With dead ends: 159 [2020-12-23 07:10:02,949 INFO L226 Difference]: Without dead ends: 128 [2020-12-23 07:10:02,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2020-12-23 07:10:02,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-12-23 07:10:02,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2020-12-23 07:10:02,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-12-23 07:10:02,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 141 transitions. [2020-12-23 07:10:02,956 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 141 transitions. Word has length 122 [2020-12-23 07:10:02,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:02,956 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 141 transitions. [2020-12-23 07:10:02,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-12-23 07:10:02,956 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 141 transitions. [2020-12-23 07:10:02,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-12-23 07:10:02,957 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:02,957 INFO L422 BasicCegarLoop]: trace histogram [60, 46, 14, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:03,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:03,173 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:03,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:03,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1685652673, now seen corresponding path program 43 times [2020-12-23 07:10:03,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:03,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232102786] [2020-12-23 07:10:03,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:03,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:04,667 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 1269 proven. 2162 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-12-23 07:10:04,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232102786] [2020-12-23 07:10:04,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119507158] [2020-12-23 07:10:04,668 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:04,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:04,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-23 07:10:04,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:04,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 1269 proven. 2162 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-12-23 07:10:04,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:04,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2020-12-23 07:10:04,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339459028] [2020-12-23 07:10:04,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-23 07:10:04,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:04,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-23 07:10:04,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 07:10:04,897 INFO L87 Difference]: Start difference. First operand 127 states and 141 transitions. Second operand 50 states. [2020-12-23 07:10:05,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:05,106 INFO L93 Difference]: Finished difference Result 162 states and 191 transitions. [2020-12-23 07:10:05,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-23 07:10:05,106 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 126 [2020-12-23 07:10:05,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:05,108 INFO L225 Difference]: With dead ends: 162 [2020-12-23 07:10:05,108 INFO L226 Difference]: Without dead ends: 129 [2020-12-23 07:10:05,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 07:10:05,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-12-23 07:10:05,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2020-12-23 07:10:05,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-12-23 07:10:05,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 143 transitions. [2020-12-23 07:10:05,113 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 143 transitions. Word has length 126 [2020-12-23 07:10:05,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:05,114 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 143 transitions. [2020-12-23 07:10:05,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-23 07:10:05,114 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 143 transitions. [2020-12-23 07:10:05,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-12-23 07:10:05,115 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:05,115 INFO L422 BasicCegarLoop]: trace histogram [61, 47, 14, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:05,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-23 07:10:05,328 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:05,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:05,329 INFO L82 PathProgramCache]: Analyzing trace with hash 834124516, now seen corresponding path program 44 times [2020-12-23 07:10:05,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:05,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228284648] [2020-12-23 07:10:05,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:05,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:06,838 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 1296 proven. 2256 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-12-23 07:10:06,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228284648] [2020-12-23 07:10:06,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874903408] [2020-12-23 07:10:06,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:06,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:10:06,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:06,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-23 07:10:06,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:07,056 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 1296 proven. 2256 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-12-23 07:10:07,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:07,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2020-12-23 07:10:07,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768046913] [2020-12-23 07:10:07,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-23 07:10:07,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:07,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-23 07:10:07,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-12-23 07:10:07,058 INFO L87 Difference]: Start difference. First operand 129 states and 143 transitions. Second operand 51 states. [2020-12-23 07:10:07,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:07,315 INFO L93 Difference]: Finished difference Result 164 states and 193 transitions. [2020-12-23 07:10:07,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-23 07:10:07,315 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 128 [2020-12-23 07:10:07,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:07,316 INFO L225 Difference]: With dead ends: 164 [2020-12-23 07:10:07,316 INFO L226 Difference]: Without dead ends: 131 [2020-12-23 07:10:07,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-12-23 07:10:07,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-12-23 07:10:07,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2020-12-23 07:10:07,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-12-23 07:10:07,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 145 transitions. [2020-12-23 07:10:07,321 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 145 transitions. Word has length 128 [2020-12-23 07:10:07,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:07,322 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 145 transitions. [2020-12-23 07:10:07,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-23 07:10:07,322 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 145 transitions. [2020-12-23 07:10:07,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-23 07:10:07,323 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:07,323 INFO L422 BasicCegarLoop]: trace histogram [62, 48, 14, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:07,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-12-23 07:10:07,529 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:07,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:07,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1440648121, now seen corresponding path program 45 times [2020-12-23 07:10:07,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:07,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738030171] [2020-12-23 07:10:07,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:07,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:09,001 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 1323 proven. 2352 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-12-23 07:10:09,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738030171] [2020-12-23 07:10:09,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779314215] [2020-12-23 07:10:09,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:09,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2020-12-23 07:10:09,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:09,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 07:10:09,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:10,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 1392 proven. 196 refuted. 0 times theorem prover too weak. 2256 trivial. 0 not checked. [2020-12-23 07:10:10,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:10,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 17] total 66 [2020-12-23 07:10:10,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850016048] [2020-12-23 07:10:10,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-12-23 07:10:10,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:10,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-12-23 07:10:10,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-12-23 07:10:10,278 INFO L87 Difference]: Start difference. First operand 131 states and 145 transitions. Second operand 66 states. [2020-12-23 07:10:10,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:10,650 INFO L93 Difference]: Finished difference Result 169 states and 201 transitions. [2020-12-23 07:10:10,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-12-23 07:10:10,650 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 130 [2020-12-23 07:10:10,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:10,652 INFO L225 Difference]: With dead ends: 169 [2020-12-23 07:10:10,652 INFO L226 Difference]: Without dead ends: 136 [2020-12-23 07:10:10,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-12-23 07:10:10,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-12-23 07:10:10,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2020-12-23 07:10:10,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-12-23 07:10:10,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 150 transitions. [2020-12-23 07:10:10,659 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 150 transitions. Word has length 130 [2020-12-23 07:10:10,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:10,659 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 150 transitions. [2020-12-23 07:10:10,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-12-23 07:10:10,659 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 150 transitions. [2020-12-23 07:10:10,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-23 07:10:10,660 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:10,660 INFO L422 BasicCegarLoop]: trace histogram [64, 49, 15, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:10,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-23 07:10:10,874 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:10,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:10,875 INFO L82 PathProgramCache]: Analyzing trace with hash -83220273, now seen corresponding path program 46 times [2020-12-23 07:10:10,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:10,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556541726] [2020-12-23 07:10:10,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:10,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:12,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 1450 proven. 2450 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-12-23 07:10:12,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556541726] [2020-12-23 07:10:12,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126550013] [2020-12-23 07:10:12,495 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:12,572 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:10:12,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:12,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-23 07:10:12,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:12,743 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 1450 proven. 2450 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-12-23 07:10:12,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:12,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2020-12-23 07:10:12,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51348810] [2020-12-23 07:10:12,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-23 07:10:12,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:12,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-23 07:10:12,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-23 07:10:12,746 INFO L87 Difference]: Start difference. First operand 135 states and 150 transitions. Second operand 53 states. [2020-12-23 07:10:12,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:12,968 INFO L93 Difference]: Finished difference Result 172 states and 203 transitions. [2020-12-23 07:10:12,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-23 07:10:12,968 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 134 [2020-12-23 07:10:12,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:12,970 INFO L225 Difference]: With dead ends: 172 [2020-12-23 07:10:12,970 INFO L226 Difference]: Without dead ends: 137 [2020-12-23 07:10:12,970 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-23 07:10:12,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-12-23 07:10:12,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2020-12-23 07:10:12,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-12-23 07:10:12,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 152 transitions. [2020-12-23 07:10:12,976 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 152 transitions. Word has length 134 [2020-12-23 07:10:12,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:12,976 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 152 transitions. [2020-12-23 07:10:12,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-23 07:10:12,976 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 152 transitions. [2020-12-23 07:10:12,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-23 07:10:12,977 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:12,977 INFO L422 BasicCegarLoop]: trace histogram [65, 50, 15, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:13,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:13,191 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:13,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:13,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1769075726, now seen corresponding path program 47 times [2020-12-23 07:10:13,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:13,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343602545] [2020-12-23 07:10:13,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:13,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:14,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 1479 proven. 2550 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-12-23 07:10:14,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343602545] [2020-12-23 07:10:14,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992753490] [2020-12-23 07:10:14,840 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:14,955 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2020-12-23 07:10:14,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:14,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-23 07:10:14,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:15,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 1479 proven. 2550 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-12-23 07:10:15,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:15,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2020-12-23 07:10:15,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286196861] [2020-12-23 07:10:15,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-23 07:10:15,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:15,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-23 07:10:15,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 07:10:15,119 INFO L87 Difference]: Start difference. First operand 137 states and 152 transitions. Second operand 54 states. [2020-12-23 07:10:15,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:15,395 INFO L93 Difference]: Finished difference Result 174 states and 205 transitions. [2020-12-23 07:10:15,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-23 07:10:15,395 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 136 [2020-12-23 07:10:15,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:15,397 INFO L225 Difference]: With dead ends: 174 [2020-12-23 07:10:15,397 INFO L226 Difference]: Without dead ends: 139 [2020-12-23 07:10:15,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 07:10:15,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-12-23 07:10:15,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2020-12-23 07:10:15,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-12-23 07:10:15,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 154 transitions. [2020-12-23 07:10:15,402 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 154 transitions. Word has length 136 [2020-12-23 07:10:15,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:15,403 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 154 transitions. [2020-12-23 07:10:15,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-23 07:10:15,403 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 154 transitions. [2020-12-23 07:10:15,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-23 07:10:15,404 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:15,404 INFO L422 BasicCegarLoop]: trace histogram [66, 51, 15, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:15,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:15,620 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:15,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:15,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1621471829, now seen corresponding path program 48 times [2020-12-23 07:10:15,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:15,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62594162] [2020-12-23 07:10:15,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:15,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:17,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 1508 proven. 2652 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-12-23 07:10:17,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62594162] [2020-12-23 07:10:17,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645625567] [2020-12-23 07:10:17,420 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:17,559 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 63 check-sat command(s) [2020-12-23 07:10:17,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:17,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 07:10:17,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:18,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 1581 proven. 225 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2020-12-23 07:10:18,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:18,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 18] total 70 [2020-12-23 07:10:18,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498825193] [2020-12-23 07:10:18,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-12-23 07:10:18,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:18,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-12-23 07:10:18,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2020-12-23 07:10:18,911 INFO L87 Difference]: Start difference. First operand 139 states and 154 transitions. Second operand 70 states. [2020-12-23 07:10:19,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:19,247 INFO L93 Difference]: Finished difference Result 179 states and 213 transitions. [2020-12-23 07:10:19,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-12-23 07:10:19,248 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 138 [2020-12-23 07:10:19,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:19,249 INFO L225 Difference]: With dead ends: 179 [2020-12-23 07:10:19,249 INFO L226 Difference]: Without dead ends: 144 [2020-12-23 07:10:19,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2020-12-23 07:10:19,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-12-23 07:10:19,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2020-12-23 07:10:19,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-12-23 07:10:19,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 159 transitions. [2020-12-23 07:10:19,254 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 159 transitions. Word has length 138 [2020-12-23 07:10:19,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:19,255 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 159 transitions. [2020-12-23 07:10:19,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-12-23 07:10:19,255 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 159 transitions. [2020-12-23 07:10:19,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-12-23 07:10:19,256 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:19,256 INFO L422 BasicCegarLoop]: trace histogram [68, 52, 16, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:19,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:19,470 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:19,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:19,471 INFO L82 PathProgramCache]: Analyzing trace with hash -530151331, now seen corresponding path program 49 times [2020-12-23 07:10:19,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:19,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275444028] [2020-12-23 07:10:19,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:19,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:21,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 1643 proven. 2756 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-12-23 07:10:21,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275444028] [2020-12-23 07:10:21,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880680181] [2020-12-23 07:10:21,175 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:21,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:21,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-23 07:10:21,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:21,409 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 1643 proven. 2756 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-12-23 07:10:21,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:21,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2020-12-23 07:10:21,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635215527] [2020-12-23 07:10:21,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-23 07:10:21,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:21,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-23 07:10:21,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 07:10:21,411 INFO L87 Difference]: Start difference. First operand 143 states and 159 transitions. Second operand 56 states. [2020-12-23 07:10:21,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:21,619 INFO L93 Difference]: Finished difference Result 182 states and 215 transitions. [2020-12-23 07:10:21,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-12-23 07:10:21,620 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 142 [2020-12-23 07:10:21,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:21,621 INFO L225 Difference]: With dead ends: 182 [2020-12-23 07:10:21,621 INFO L226 Difference]: Without dead ends: 145 [2020-12-23 07:10:21,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 07:10:21,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-12-23 07:10:21,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2020-12-23 07:10:21,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-12-23 07:10:21,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 161 transitions. [2020-12-23 07:10:21,628 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 161 transitions. Word has length 142 [2020-12-23 07:10:21,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:21,628 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 161 transitions. [2020-12-23 07:10:21,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-23 07:10:21,628 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 161 transitions. [2020-12-23 07:10:21,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-12-23 07:10:21,629 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:21,629 INFO L422 BasicCegarLoop]: trace histogram [69, 53, 16, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:21,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:21,830 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:21,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:21,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1018337408, now seen corresponding path program 50 times [2020-12-23 07:10:21,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:21,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698268877] [2020-12-23 07:10:21,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:21,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:23,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 1674 proven. 2862 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-12-23 07:10:23,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698268877] [2020-12-23 07:10:23,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893821819] [2020-12-23 07:10:23,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:23,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:10:23,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:23,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 55 conjunts are in the unsatisfiable core [2020-12-23 07:10:23,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:23,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 1674 proven. 2862 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-12-23 07:10:23,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:23,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 57 [2020-12-23 07:10:23,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024259138] [2020-12-23 07:10:23,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-12-23 07:10:23,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:23,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-12-23 07:10:23,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 07:10:23,928 INFO L87 Difference]: Start difference. First operand 145 states and 161 transitions. Second operand 57 states. [2020-12-23 07:10:24,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:24,213 INFO L93 Difference]: Finished difference Result 184 states and 217 transitions. [2020-12-23 07:10:24,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-12-23 07:10:24,214 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 144 [2020-12-23 07:10:24,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:24,215 INFO L225 Difference]: With dead ends: 184 [2020-12-23 07:10:24,215 INFO L226 Difference]: Without dead ends: 147 [2020-12-23 07:10:24,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 07:10:24,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-12-23 07:10:24,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2020-12-23 07:10:24,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-12-23 07:10:24,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 163 transitions. [2020-12-23 07:10:24,221 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 163 transitions. Word has length 144 [2020-12-23 07:10:24,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:24,222 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 163 transitions. [2020-12-23 07:10:24,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-12-23 07:10:24,222 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 163 transitions. [2020-12-23 07:10:24,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-12-23 07:10:24,223 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:24,223 INFO L422 BasicCegarLoop]: trace histogram [70, 54, 16, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:24,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-12-23 07:10:24,439 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:24,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:24,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1237636125, now seen corresponding path program 51 times [2020-12-23 07:10:24,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:24,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585654930] [2020-12-23 07:10:24,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:24,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:26,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 1705 proven. 2970 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-12-23 07:10:26,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585654930] [2020-12-23 07:10:26,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208136562] [2020-12-23 07:10:26,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:26,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2020-12-23 07:10:26,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:26,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 07:10:26,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:28,020 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 1782 proven. 256 refuted. 0 times theorem prover too weak. 2862 trivial. 0 not checked. [2020-12-23 07:10:28,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:28,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 19] total 74 [2020-12-23 07:10:28,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114224037] [2020-12-23 07:10:28,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-12-23 07:10:28,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:28,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-12-23 07:10:28,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2020-12-23 07:10:28,022 INFO L87 Difference]: Start difference. First operand 147 states and 163 transitions. Second operand 74 states. [2020-12-23 07:10:28,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:28,451 INFO L93 Difference]: Finished difference Result 189 states and 225 transitions. [2020-12-23 07:10:28,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-12-23 07:10:28,451 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 146 [2020-12-23 07:10:28,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:28,452 INFO L225 Difference]: With dead ends: 189 [2020-12-23 07:10:28,452 INFO L226 Difference]: Without dead ends: 152 [2020-12-23 07:10:28,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2020-12-23 07:10:28,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-12-23 07:10:28,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2020-12-23 07:10:28,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-12-23 07:10:28,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 168 transitions. [2020-12-23 07:10:28,458 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 168 transitions. Word has length 146 [2020-12-23 07:10:28,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:28,459 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 168 transitions. [2020-12-23 07:10:28,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-12-23 07:10:28,459 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 168 transitions. [2020-12-23 07:10:28,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-12-23 07:10:28,460 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:28,460 INFO L422 BasicCegarLoop]: trace histogram [72, 55, 17, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:28,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:28,671 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:28,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:28,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1447672981, now seen corresponding path program 52 times [2020-12-23 07:10:28,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:28,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937632488] [2020-12-23 07:10:28,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:28,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:30,600 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 1848 proven. 3080 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-12-23 07:10:30,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937632488] [2020-12-23 07:10:30,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619817999] [2020-12-23 07:10:30,600 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:30,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:10:30,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:30,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 57 conjunts are in the unsatisfiable core [2020-12-23 07:10:30,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:30,875 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 1848 proven. 3080 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-12-23 07:10:30,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:30,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 59 [2020-12-23 07:10:30,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346763496] [2020-12-23 07:10:30,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-12-23 07:10:30,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:30,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-12-23 07:10:30,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-12-23 07:10:30,878 INFO L87 Difference]: Start difference. First operand 151 states and 168 transitions. Second operand 59 states. [2020-12-23 07:10:31,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:31,088 INFO L93 Difference]: Finished difference Result 192 states and 227 transitions. [2020-12-23 07:10:31,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-12-23 07:10:31,088 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 150 [2020-12-23 07:10:31,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:31,089 INFO L225 Difference]: With dead ends: 192 [2020-12-23 07:10:31,089 INFO L226 Difference]: Without dead ends: 153 [2020-12-23 07:10:31,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-12-23 07:10:31,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-12-23 07:10:31,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2020-12-23 07:10:31,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-12-23 07:10:31,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 170 transitions. [2020-12-23 07:10:31,095 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 170 transitions. Word has length 150 [2020-12-23 07:10:31,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:31,095 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 170 transitions. [2020-12-23 07:10:31,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-12-23 07:10:31,095 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 170 transitions. [2020-12-23 07:10:31,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-12-23 07:10:31,096 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:31,096 INFO L422 BasicCegarLoop]: trace histogram [73, 56, 17, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:31,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-12-23 07:10:31,310 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:31,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:31,310 INFO L82 PathProgramCache]: Analyzing trace with hash -2041741170, now seen corresponding path program 53 times [2020-12-23 07:10:31,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:31,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463537200] [2020-12-23 07:10:31,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:31,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:33,438 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 1881 proven. 3192 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-12-23 07:10:33,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463537200] [2020-12-23 07:10:33,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582011488] [2020-12-23 07:10:33,439 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:33,567 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 74 check-sat command(s) [2020-12-23 07:10:33,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:33,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-23 07:10:33,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:33,745 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 1881 proven. 3192 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-12-23 07:10:33,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:33,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2020-12-23 07:10:33,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994030124] [2020-12-23 07:10:33,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-12-23 07:10:33,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:33,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-12-23 07:10:33,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 07:10:33,747 INFO L87 Difference]: Start difference. First operand 153 states and 170 transitions. Second operand 60 states. [2020-12-23 07:10:33,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:33,987 INFO L93 Difference]: Finished difference Result 194 states and 229 transitions. [2020-12-23 07:10:33,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-12-23 07:10:33,988 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 152 [2020-12-23 07:10:33,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:33,989 INFO L225 Difference]: With dead ends: 194 [2020-12-23 07:10:33,989 INFO L226 Difference]: Without dead ends: 155 [2020-12-23 07:10:33,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 07:10:33,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-12-23 07:10:33,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2020-12-23 07:10:33,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-12-23 07:10:33,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 172 transitions. [2020-12-23 07:10:33,994 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 172 transitions. Word has length 152 [2020-12-23 07:10:33,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:33,995 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 172 transitions. [2020-12-23 07:10:33,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-12-23 07:10:33,995 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 172 transitions. [2020-12-23 07:10:33,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-12-23 07:10:33,996 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:33,996 INFO L422 BasicCegarLoop]: trace histogram [74, 57, 17, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:34,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-12-23 07:10:34,209 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:34,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:34,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1710620431, now seen corresponding path program 54 times [2020-12-23 07:10:34,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:34,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150522078] [2020-12-23 07:10:34,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:34,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:36,383 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 1914 proven. 3306 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-12-23 07:10:36,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150522078] [2020-12-23 07:10:36,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007315060] [2020-12-23 07:10:36,383 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:36,538 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 71 check-sat command(s) [2020-12-23 07:10:36,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:36,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 07:10:36,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:38,240 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 1995 proven. 289 refuted. 0 times theorem prover too weak. 3192 trivial. 0 not checked. [2020-12-23 07:10:38,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:38,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 20] total 78 [2020-12-23 07:10:38,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675859324] [2020-12-23 07:10:38,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-12-23 07:10:38,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:38,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-12-23 07:10:38,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-12-23 07:10:38,242 INFO L87 Difference]: Start difference. First operand 155 states and 172 transitions. Second operand 78 states. [2020-12-23 07:10:38,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:38,686 INFO L93 Difference]: Finished difference Result 199 states and 237 transitions. [2020-12-23 07:10:38,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-12-23 07:10:38,686 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 154 [2020-12-23 07:10:38,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:38,687 INFO L225 Difference]: With dead ends: 199 [2020-12-23 07:10:38,687 INFO L226 Difference]: Without dead ends: 160 [2020-12-23 07:10:38,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-12-23 07:10:38,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-12-23 07:10:38,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 159. [2020-12-23 07:10:38,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-12-23 07:10:38,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 177 transitions. [2020-12-23 07:10:38,694 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 177 transitions. Word has length 154 [2020-12-23 07:10:38,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:38,694 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 177 transitions. [2020-12-23 07:10:38,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-12-23 07:10:38,694 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 177 transitions. [2020-12-23 07:10:38,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-12-23 07:10:38,695 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:38,695 INFO L422 BasicCegarLoop]: trace histogram [76, 58, 18, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:38,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:38,909 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:38,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:38,910 INFO L82 PathProgramCache]: Analyzing trace with hash 697924089, now seen corresponding path program 55 times [2020-12-23 07:10:38,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:38,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208128808] [2020-12-23 07:10:38,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:38,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:41,180 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 2065 proven. 3422 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-12-23 07:10:41,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208128808] [2020-12-23 07:10:41,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896659506] [2020-12-23 07:10:41,180 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:41,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:41,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 60 conjunts are in the unsatisfiable core [2020-12-23 07:10:41,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:41,454 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 2065 proven. 3422 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-12-23 07:10:41,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:41,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 62 [2020-12-23 07:10:41,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257879909] [2020-12-23 07:10:41,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-12-23 07:10:41,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:41,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-12-23 07:10:41,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2020-12-23 07:10:41,456 INFO L87 Difference]: Start difference. First operand 159 states and 177 transitions. Second operand 62 states. [2020-12-23 07:10:41,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:41,792 INFO L93 Difference]: Finished difference Result 202 states and 239 transitions. [2020-12-23 07:10:41,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-12-23 07:10:41,792 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 158 [2020-12-23 07:10:41,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:41,794 INFO L225 Difference]: With dead ends: 202 [2020-12-23 07:10:41,794 INFO L226 Difference]: Without dead ends: 161 [2020-12-23 07:10:41,795 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2020-12-23 07:10:41,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-12-23 07:10:41,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2020-12-23 07:10:41,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-12-23 07:10:41,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 179 transitions. [2020-12-23 07:10:41,800 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 179 transitions. Word has length 158 [2020-12-23 07:10:41,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:41,800 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 179 transitions. [2020-12-23 07:10:41,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-12-23 07:10:41,801 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 179 transitions. [2020-12-23 07:10:41,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-23 07:10:41,801 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:41,802 INFO L422 BasicCegarLoop]: trace histogram [77, 59, 18, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:42,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-12-23 07:10:42,009 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:42,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:42,009 INFO L82 PathProgramCache]: Analyzing trace with hash 318694428, now seen corresponding path program 56 times [2020-12-23 07:10:42,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:42,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95871844] [2020-12-23 07:10:42,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:42,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:44,307 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 2100 proven. 3540 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-12-23 07:10:44,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95871844] [2020-12-23 07:10:44,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601411868] [2020-12-23 07:10:44,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:44,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:10:44,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:44,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 61 conjunts are in the unsatisfiable core [2020-12-23 07:10:44,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:44,605 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 2100 proven. 3540 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-12-23 07:10:44,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:44,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 63 [2020-12-23 07:10:44,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110971973] [2020-12-23 07:10:44,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-12-23 07:10:44,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:44,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-12-23 07:10:44,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-12-23 07:10:44,607 INFO L87 Difference]: Start difference. First operand 161 states and 179 transitions. Second operand 63 states. [2020-12-23 07:10:44,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:44,942 INFO L93 Difference]: Finished difference Result 204 states and 241 transitions. [2020-12-23 07:10:44,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-12-23 07:10:44,943 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 160 [2020-12-23 07:10:44,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:44,944 INFO L225 Difference]: With dead ends: 204 [2020-12-23 07:10:44,944 INFO L226 Difference]: Without dead ends: 163 [2020-12-23 07:10:44,945 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-12-23 07:10:44,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-12-23 07:10:44,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2020-12-23 07:10:44,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-12-23 07:10:44,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 181 transitions. [2020-12-23 07:10:44,950 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 181 transitions. Word has length 160 [2020-12-23 07:10:44,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:44,951 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 181 transitions. [2020-12-23 07:10:44,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-12-23 07:10:44,951 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 181 transitions. [2020-12-23 07:10:44,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-12-23 07:10:44,952 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:44,952 INFO L422 BasicCegarLoop]: trace histogram [78, 60, 18, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:45,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:45,159 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:45,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:45,160 INFO L82 PathProgramCache]: Analyzing trace with hash 951210367, now seen corresponding path program 57 times [2020-12-23 07:10:45,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:45,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608602085] [2020-12-23 07:10:45,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:45,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:47,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 2135 proven. 3660 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-12-23 07:10:47,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608602085] [2020-12-23 07:10:47,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451287425] [2020-12-23 07:10:47,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:47,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 38 check-sat command(s) [2020-12-23 07:10:47,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:47,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 07:10:47,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:49,601 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 2220 proven. 324 refuted. 0 times theorem prover too weak. 3540 trivial. 0 not checked. [2020-12-23 07:10:49,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:49,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 21] total 82 [2020-12-23 07:10:49,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099455498] [2020-12-23 07:10:49,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-12-23 07:10:49,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:49,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-12-23 07:10:49,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2020-12-23 07:10:49,603 INFO L87 Difference]: Start difference. First operand 163 states and 181 transitions. Second operand 82 states. [2020-12-23 07:10:50,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:50,152 INFO L93 Difference]: Finished difference Result 209 states and 249 transitions. [2020-12-23 07:10:50,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-12-23 07:10:50,152 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 162 [2020-12-23 07:10:50,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:50,155 INFO L225 Difference]: With dead ends: 209 [2020-12-23 07:10:50,155 INFO L226 Difference]: Without dead ends: 168 [2020-12-23 07:10:50,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2020-12-23 07:10:50,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-12-23 07:10:50,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 167. [2020-12-23 07:10:50,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-12-23 07:10:50,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 186 transitions. [2020-12-23 07:10:50,161 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 186 transitions. Word has length 162 [2020-12-23 07:10:50,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:50,161 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 186 transitions. [2020-12-23 07:10:50,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-12-23 07:10:50,161 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 186 transitions. [2020-12-23 07:10:50,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-12-23 07:10:50,162 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:50,162 INFO L422 BasicCegarLoop]: trace histogram [80, 61, 19, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:50,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2020-12-23 07:10:50,374 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:50,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:50,374 INFO L82 PathProgramCache]: Analyzing trace with hash -232240121, now seen corresponding path program 58 times [2020-12-23 07:10:50,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:50,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690185244] [2020-12-23 07:10:50,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:50,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:52,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 2294 proven. 3782 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-12-23 07:10:52,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690185244] [2020-12-23 07:10:52,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861642431] [2020-12-23 07:10:52,918 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:53,017 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:10:53,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:53,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 63 conjunts are in the unsatisfiable core [2020-12-23 07:10:53,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:53,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 2294 proven. 3782 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-12-23 07:10:53,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:53,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 65 [2020-12-23 07:10:53,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164340674] [2020-12-23 07:10:53,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-12-23 07:10:53,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:53,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-12-23 07:10:53,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2020-12-23 07:10:53,217 INFO L87 Difference]: Start difference. First operand 167 states and 186 transitions. Second operand 65 states. [2020-12-23 07:10:53,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:53,478 INFO L93 Difference]: Finished difference Result 212 states and 251 transitions. [2020-12-23 07:10:53,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-12-23 07:10:53,479 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 166 [2020-12-23 07:10:53,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:53,481 INFO L225 Difference]: With dead ends: 212 [2020-12-23 07:10:53,481 INFO L226 Difference]: Without dead ends: 169 [2020-12-23 07:10:53,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2020-12-23 07:10:53,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-12-23 07:10:53,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2020-12-23 07:10:53,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-12-23 07:10:53,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 188 transitions. [2020-12-23 07:10:53,486 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 188 transitions. Word has length 166 [2020-12-23 07:10:53,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:53,486 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 188 transitions. [2020-12-23 07:10:53,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-12-23 07:10:53,487 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 188 transitions. [2020-12-23 07:10:53,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-12-23 07:10:53,487 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:53,488 INFO L422 BasicCegarLoop]: trace histogram [81, 62, 19, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:53,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:53,702 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:53,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:53,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1105126186, now seen corresponding path program 59 times [2020-12-23 07:10:53,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:53,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516496515] [2020-12-23 07:10:53,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:53,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:56,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 2331 proven. 3906 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-12-23 07:10:56,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516496515] [2020-12-23 07:10:56,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447615075] [2020-12-23 07:10:56,357 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:56,500 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 82 check-sat command(s) [2020-12-23 07:10:56,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:56,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 64 conjunts are in the unsatisfiable core [2020-12-23 07:10:56,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:56,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 2331 proven. 3906 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-12-23 07:10:56,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:56,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2020-12-23 07:10:56,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243686927] [2020-12-23 07:10:56,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-12-23 07:10:56,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:56,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-12-23 07:10:56,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-12-23 07:10:56,708 INFO L87 Difference]: Start difference. First operand 169 states and 188 transitions. Second operand 66 states. [2020-12-23 07:10:57,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:57,058 INFO L93 Difference]: Finished difference Result 214 states and 253 transitions. [2020-12-23 07:10:57,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-12-23 07:10:57,058 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 168 [2020-12-23 07:10:57,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:57,060 INFO L225 Difference]: With dead ends: 214 [2020-12-23 07:10:57,060 INFO L226 Difference]: Without dead ends: 171 [2020-12-23 07:10:57,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-12-23 07:10:57,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-12-23 07:10:57,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2020-12-23 07:10:57,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-12-23 07:10:57,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 190 transitions. [2020-12-23 07:10:57,067 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 190 transitions. Word has length 168 [2020-12-23 07:10:57,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:57,067 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 190 transitions. [2020-12-23 07:10:57,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-12-23 07:10:57,067 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 190 transitions. [2020-12-23 07:10:57,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-12-23 07:10:57,068 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:57,068 INFO L422 BasicCegarLoop]: trace histogram [82, 63, 19, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:57,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-12-23 07:10:57,282 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:57,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:57,283 INFO L82 PathProgramCache]: Analyzing trace with hash 2118925709, now seen corresponding path program 60 times [2020-12-23 07:10:57,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:57,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549093129] [2020-12-23 07:10:57,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:57,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:59,976 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 2368 proven. 4032 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-12-23 07:10:59,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549093129] [2020-12-23 07:10:59,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481641153] [2020-12-23 07:10:59,976 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:11:00,154 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2020-12-23 07:11:00,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:11:00,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 07:11:00,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:11:02,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 2457 proven. 361 refuted. 0 times theorem prover too weak. 3906 trivial. 0 not checked. [2020-12-23 07:11:02,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:11:02,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 22] total 86 [2020-12-23 07:11:02,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671910613] [2020-12-23 07:11:02,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-12-23 07:11:02,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:11:02,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-12-23 07:11:02,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2020-12-23 07:11:02,227 INFO L87 Difference]: Start difference. First operand 171 states and 190 transitions. Second operand 86 states. [2020-12-23 07:11:02,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:11:02,796 INFO L93 Difference]: Finished difference Result 219 states and 261 transitions. [2020-12-23 07:11:02,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2020-12-23 07:11:02,797 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 170 [2020-12-23 07:11:02,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:11:02,798 INFO L225 Difference]: With dead ends: 219 [2020-12-23 07:11:02,798 INFO L226 Difference]: Without dead ends: 176 [2020-12-23 07:11:02,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2020-12-23 07:11:02,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-12-23 07:11:02,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2020-12-23 07:11:02,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-12-23 07:11:02,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 195 transitions. [2020-12-23 07:11:02,804 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 195 transitions. Word has length 170 [2020-12-23 07:11:02,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:11:02,804 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 195 transitions. [2020-12-23 07:11:02,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-12-23 07:11:02,804 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 195 transitions. [2020-12-23 07:11:02,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-12-23 07:11:02,805 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:11:02,805 INFO L422 BasicCegarLoop]: trace histogram [84, 64, 20, 1, 1, 1, 1, 1, 1] [2020-12-23 07:11:03,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:11:03,021 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:11:03,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:11:03,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1458755989, now seen corresponding path program 61 times [2020-12-23 07:11:03,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:11:03,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987574300] [2020-12-23 07:11:03,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:11:03,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:11:05,818 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 2535 proven. 4160 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2020-12-23 07:11:05,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987574300] [2020-12-23 07:11:05,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001213963] [2020-12-23 07:11:05,819 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:11:05,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:11:05,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 66 conjunts are in the unsatisfiable core [2020-12-23 07:11:05,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:11:06,114 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 2535 proven. 4160 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2020-12-23 07:11:06,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:11:06,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 68 [2020-12-23 07:11:06,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498730044] [2020-12-23 07:11:06,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-12-23 07:11:06,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:11:06,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-12-23 07:11:06,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2020-12-23 07:11:06,117 INFO L87 Difference]: Start difference. First operand 175 states and 195 transitions. Second operand 68 states. [2020-12-23 07:11:06,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:11:06,355 INFO L93 Difference]: Finished difference Result 222 states and 263 transitions. [2020-12-23 07:11:06,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-12-23 07:11:06,356 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 174 [2020-12-23 07:11:06,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:11:06,357 INFO L225 Difference]: With dead ends: 222 [2020-12-23 07:11:06,358 INFO L226 Difference]: Without dead ends: 177 [2020-12-23 07:11:06,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2020-12-23 07:11:06,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-12-23 07:11:06,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2020-12-23 07:11:06,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-12-23 07:11:06,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 197 transitions. [2020-12-23 07:11:06,363 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 197 transitions. Word has length 174 [2020-12-23 07:11:06,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:11:06,364 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 197 transitions. [2020-12-23 07:11:06,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-12-23 07:11:06,364 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 197 transitions. [2020-12-23 07:11:06,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-12-23 07:11:06,365 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:11:06,365 INFO L422 BasicCegarLoop]: trace histogram [85, 65, 20, 1, 1, 1, 1, 1, 1] [2020-12-23 07:11:06,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-12-23 07:11:06,581 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:11:06,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:11:06,582 INFO L82 PathProgramCache]: Analyzing trace with hash 863870392, now seen corresponding path program 62 times [2020-12-23 07:11:06,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:11:06,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435287678] [2020-12-23 07:11:06,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:11:06,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:11:09,468 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 2574 proven. 4290 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2020-12-23 07:11:09,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435287678] [2020-12-23 07:11:09,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418474554] [2020-12-23 07:11:09,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:11:09,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:11:09,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:11:09,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 67 conjunts are in the unsatisfiable core [2020-12-23 07:11:09,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:11:09,772 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 2574 proven. 4290 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2020-12-23 07:11:09,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:11:09,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 69 [2020-12-23 07:11:09,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485907022] [2020-12-23 07:11:09,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-12-23 07:11:09,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:11:09,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-12-23 07:11:09,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-12-23 07:11:09,776 INFO L87 Difference]: Start difference. First operand 177 states and 197 transitions. Second operand 69 states. [2020-12-23 07:11:10,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:11:10,082 INFO L93 Difference]: Finished difference Result 224 states and 265 transitions. [2020-12-23 07:11:10,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-12-23 07:11:10,083 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 176 [2020-12-23 07:11:10,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:11:10,084 INFO L225 Difference]: With dead ends: 224 [2020-12-23 07:11:10,084 INFO L226 Difference]: Without dead ends: 179 [2020-12-23 07:11:10,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-12-23 07:11:10,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-12-23 07:11:10,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2020-12-23 07:11:10,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-12-23 07:11:10,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 199 transitions. [2020-12-23 07:11:10,089 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 199 transitions. Word has length 176 [2020-12-23 07:11:10,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:11:10,090 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 199 transitions. [2020-12-23 07:11:10,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-12-23 07:11:10,090 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 199 transitions. [2020-12-23 07:11:10,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-12-23 07:11:10,091 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:11:10,091 INFO L422 BasicCegarLoop]: trace histogram [86, 66, 20, 1, 1, 1, 1, 1, 1] [2020-12-23 07:11:10,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:11:10,306 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:11:10,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:11:10,306 INFO L82 PathProgramCache]: Analyzing trace with hash 409462043, now seen corresponding path program 63 times [2020-12-23 07:11:10,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:11:10,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620101770] [2020-12-23 07:11:10,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:11:10,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:11:13,264 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 2613 proven. 4422 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2020-12-23 07:11:13,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620101770] [2020-12-23 07:11:13,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141835599] [2020-12-23 07:11:13,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:11:13,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2020-12-23 07:11:13,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:11:13,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 07:11:13,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:11:15,682 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 2706 proven. 400 refuted. 0 times theorem prover too weak. 4290 trivial. 0 not checked. [2020-12-23 07:11:15,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:11:15,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 23] total 90 [2020-12-23 07:11:15,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178169319] [2020-12-23 07:11:15,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 90 states [2020-12-23 07:11:15,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:11:15,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2020-12-23 07:11:15,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2020-12-23 07:11:15,685 INFO L87 Difference]: Start difference. First operand 179 states and 199 transitions. Second operand 90 states. [2020-12-23 07:11:16,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:11:16,319 INFO L93 Difference]: Finished difference Result 229 states and 273 transitions. [2020-12-23 07:11:16,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2020-12-23 07:11:16,320 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 178 [2020-12-23 07:11:16,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:11:16,321 INFO L225 Difference]: With dead ends: 229 [2020-12-23 07:11:16,321 INFO L226 Difference]: Without dead ends: 184 [2020-12-23 07:11:16,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2020-12-23 07:11:16,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-12-23 07:11:16,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 183. [2020-12-23 07:11:16,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-12-23 07:11:16,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 204 transitions. [2020-12-23 07:11:16,333 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 204 transitions. Word has length 178 [2020-12-23 07:11:16,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:11:16,334 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 204 transitions. [2020-12-23 07:11:16,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 90 states. [2020-12-23 07:11:16,334 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 204 transitions. [2020-12-23 07:11:16,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-12-23 07:11:16,334 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:11:16,335 INFO L422 BasicCegarLoop]: trace histogram [88, 67, 21, 1, 1, 1, 1, 1, 1] [2020-12-23 07:11:16,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-12-23 07:11:16,535 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:11:16,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:11:16,536 INFO L82 PathProgramCache]: Analyzing trace with hash -285130077, now seen corresponding path program 64 times [2020-12-23 07:11:16,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:11:16,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366003071] [2020-12-23 07:11:16,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:11:16,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:11:19,619 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 2788 proven. 4556 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-12-23 07:11:19,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366003071] [2020-12-23 07:11:19,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874573440] [2020-12-23 07:11:19,619 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:11:19,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:11:19,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:11:19,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 69 conjunts are in the unsatisfiable core [2020-12-23 07:11:19,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:11:19,942 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 2788 proven. 4556 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-12-23 07:11:19,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:11:19,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 71 [2020-12-23 07:11:19,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505071936] [2020-12-23 07:11:19,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-12-23 07:11:19,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:11:19,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-12-23 07:11:19,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2020-12-23 07:11:19,945 INFO L87 Difference]: Start difference. First operand 183 states and 204 transitions. Second operand 71 states. [2020-12-23 07:11:20,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:11:20,221 INFO L93 Difference]: Finished difference Result 232 states and 275 transitions. [2020-12-23 07:11:20,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-12-23 07:11:20,222 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 182 [2020-12-23 07:11:20,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:11:20,223 INFO L225 Difference]: With dead ends: 232 [2020-12-23 07:11:20,223 INFO L226 Difference]: Without dead ends: 185 [2020-12-23 07:11:20,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2020-12-23 07:11:20,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-12-23 07:11:20,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2020-12-23 07:11:20,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-12-23 07:11:20,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 206 transitions. [2020-12-23 07:11:20,229 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 206 transitions. Word has length 182 [2020-12-23 07:11:20,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:11:20,229 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 206 transitions. [2020-12-23 07:11:20,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-12-23 07:11:20,229 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 206 transitions. [2020-12-23 07:11:20,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-12-23 07:11:20,230 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:11:20,230 INFO L422 BasicCegarLoop]: trace histogram [89, 68, 21, 1, 1, 1, 1, 1, 1] [2020-12-23 07:11:20,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-12-23 07:11:20,443 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:11:20,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:11:20,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1273181126, now seen corresponding path program 65 times [2020-12-23 07:11:20,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:11:20,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742466249] [2020-12-23 07:11:20,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:11:20,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:11:23,617 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 2829 proven. 4692 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-12-23 07:11:23,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742466249] [2020-12-23 07:11:23,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120121758] [2020-12-23 07:11:23,618 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:11:23,769 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2020-12-23 07:11:23,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:11:23,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 70 conjunts are in the unsatisfiable core [2020-12-23 07:11:23,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:11:23,999 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 2829 proven. 4692 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-12-23 07:11:23,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:11:23,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 72 [2020-12-23 07:11:24,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718373148] [2020-12-23 07:11:24,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-12-23 07:11:24,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:11:24,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-12-23 07:11:24,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2020-12-23 07:11:24,001 INFO L87 Difference]: Start difference. First operand 185 states and 206 transitions. Second operand 72 states. [2020-12-23 07:11:24,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:11:24,395 INFO L93 Difference]: Finished difference Result 234 states and 277 transitions. [2020-12-23 07:11:24,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-12-23 07:11:24,395 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 184 [2020-12-23 07:11:24,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:11:24,397 INFO L225 Difference]: With dead ends: 234 [2020-12-23 07:11:24,397 INFO L226 Difference]: Without dead ends: 187 [2020-12-23 07:11:24,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2020-12-23 07:11:24,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-12-23 07:11:24,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2020-12-23 07:11:24,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-12-23 07:11:24,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 208 transitions. [2020-12-23 07:11:24,404 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 208 transitions. Word has length 184 [2020-12-23 07:11:24,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:11:24,404 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 208 transitions. [2020-12-23 07:11:24,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-12-23 07:11:24,404 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 208 transitions. [2020-12-23 07:11:24,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-12-23 07:11:24,405 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:11:24,405 INFO L422 BasicCegarLoop]: trace histogram [90, 69, 21, 1, 1, 1, 1, 1, 1] [2020-12-23 07:11:24,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-12-23 07:11:24,620 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:11:24,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:11:24,620 INFO L82 PathProgramCache]: Analyzing trace with hash -133339095, now seen corresponding path program 66 times [2020-12-23 07:11:24,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:11:24,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249738824] [2020-12-23 07:11:24,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:11:24,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:11:27,891 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 2870 proven. 4830 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-12-23 07:11:27,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249738824] [2020-12-23 07:11:27,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858923685] [2020-12-23 07:11:27,892 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:11:28,082 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 87 check-sat command(s) [2020-12-23 07:11:28,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:11:28,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 07:11:28,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:11:30,491 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 2967 proven. 441 refuted. 0 times theorem prover too weak. 4692 trivial. 0 not checked. [2020-12-23 07:11:30,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:11:30,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 24] total 94 [2020-12-23 07:11:30,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458557577] [2020-12-23 07:11:30,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 94 states [2020-12-23 07:11:30,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:11:30,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2020-12-23 07:11:30,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2020-12-23 07:11:30,494 INFO L87 Difference]: Start difference. First operand 187 states and 208 transitions. Second operand 94 states. [2020-12-23 07:11:31,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:11:31,197 INFO L93 Difference]: Finished difference Result 239 states and 285 transitions. [2020-12-23 07:11:31,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-12-23 07:11:31,197 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 186 [2020-12-23 07:11:31,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:11:31,198 INFO L225 Difference]: With dead ends: 239 [2020-12-23 07:11:31,198 INFO L226 Difference]: Without dead ends: 192 [2020-12-23 07:11:31,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2020-12-23 07:11:31,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-12-23 07:11:31,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 191. [2020-12-23 07:11:31,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-12-23 07:11:31,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 213 transitions. [2020-12-23 07:11:31,203 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 213 transitions. Word has length 186 [2020-12-23 07:11:31,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:11:31,204 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 213 transitions. [2020-12-23 07:11:31,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 94 states. [2020-12-23 07:11:31,204 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 213 transitions. [2020-12-23 07:11:31,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-12-23 07:11:31,205 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:11:31,205 INFO L422 BasicCegarLoop]: trace histogram [92, 70, 22, 1, 1, 1, 1, 1, 1] [2020-12-23 07:11:31,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:11:31,420 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:11:31,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:11:31,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1764513999, now seen corresponding path program 67 times [2020-12-23 07:11:31,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:11:31,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572755946] [2020-12-23 07:11:31,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:11:31,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:11:34,741 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 3053 proven. 4970 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-12-23 07:11:34,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572755946] [2020-12-23 07:11:34,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505437197] [2020-12-23 07:11:34,741 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:11:34,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:11:34,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 72 conjunts are in the unsatisfiable core [2020-12-23 07:11:34,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:11:35,067 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 3053 proven. 4970 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-12-23 07:11:35,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:11:35,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 74 [2020-12-23 07:11:35,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879075194] [2020-12-23 07:11:35,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-12-23 07:11:35,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:11:35,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-12-23 07:11:35,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2020-12-23 07:11:35,069 INFO L87 Difference]: Start difference. First operand 191 states and 213 transitions. Second operand 74 states. [2020-12-23 07:11:35,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:11:35,496 INFO L93 Difference]: Finished difference Result 242 states and 287 transitions. [2020-12-23 07:11:35,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-12-23 07:11:35,496 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 190 [2020-12-23 07:11:35,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:11:35,498 INFO L225 Difference]: With dead ends: 242 [2020-12-23 07:11:35,498 INFO L226 Difference]: Without dead ends: 193 [2020-12-23 07:11:35,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2020-12-23 07:11:35,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-12-23 07:11:35,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2020-12-23 07:11:35,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-12-23 07:11:35,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 215 transitions. [2020-12-23 07:11:35,503 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 215 transitions. Word has length 190 [2020-12-23 07:11:35,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:11:35,503 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 215 transitions. [2020-12-23 07:11:35,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-12-23 07:11:35,504 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 215 transitions. [2020-12-23 07:11:35,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-12-23 07:11:35,505 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:11:35,505 INFO L422 BasicCegarLoop]: trace histogram [93, 71, 22, 1, 1, 1, 1, 1, 1] [2020-12-23 07:11:35,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:11:35,721 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:11:35,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:11:35,722 INFO L82 PathProgramCache]: Analyzing trace with hash 881837396, now seen corresponding path program 68 times [2020-12-23 07:11:35,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:11:35,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486445877] [2020-12-23 07:11:35,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:11:35,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:11:39,167 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 3096 proven. 5112 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-12-23 07:11:39,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486445877] [2020-12-23 07:11:39,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348692630] [2020-12-23 07:11:39,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:11:39,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:11:39,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:11:39,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 73 conjunts are in the unsatisfiable core [2020-12-23 07:11:39,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:11:39,505 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 3096 proven. 5112 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-12-23 07:11:39,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:11:39,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 75 [2020-12-23 07:11:39,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986953083] [2020-12-23 07:11:39,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-12-23 07:11:39,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:11:39,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-12-23 07:11:39,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-12-23 07:11:39,507 INFO L87 Difference]: Start difference. First operand 193 states and 215 transitions. Second operand 75 states. [2020-12-23 07:11:39,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:11:39,932 INFO L93 Difference]: Finished difference Result 244 states and 289 transitions. [2020-12-23 07:11:39,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-12-23 07:11:39,933 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 192 [2020-12-23 07:11:39,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:11:39,934 INFO L225 Difference]: With dead ends: 244 [2020-12-23 07:11:39,934 INFO L226 Difference]: Without dead ends: 195 [2020-12-23 07:11:39,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-12-23 07:11:39,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-12-23 07:11:39,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2020-12-23 07:11:39,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-12-23 07:11:39,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 217 transitions. [2020-12-23 07:11:39,941 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 217 transitions. Word has length 192 [2020-12-23 07:11:39,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:11:39,942 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 217 transitions. [2020-12-23 07:11:39,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-12-23 07:11:39,942 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 217 transitions. [2020-12-23 07:11:39,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-12-23 07:11:39,943 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:11:39,943 INFO L422 BasicCegarLoop]: trace histogram [94, 72, 22, 1, 1, 1, 1, 1, 1] [2020-12-23 07:11:40,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:11:40,158 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:11:40,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:11:40,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1404888759, now seen corresponding path program 69 times [2020-12-23 07:11:40,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:11:40,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087835624] [2020-12-23 07:11:40,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:11:40,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:11:43,760 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 3139 proven. 5256 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-12-23 07:11:43,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087835624] [2020-12-23 07:11:43,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411328894] [2020-12-23 07:11:43,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:11:43,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2020-12-23 07:11:43,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:11:43,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 07:11:43,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:11:46,662 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 3240 proven. 484 refuted. 0 times theorem prover too weak. 5112 trivial. 0 not checked. [2020-12-23 07:11:46,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:11:46,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 25] total 98 [2020-12-23 07:11:46,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821964164] [2020-12-23 07:11:46,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 98 states [2020-12-23 07:11:46,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:11:46,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2020-12-23 07:11:46,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2020-12-23 07:11:46,665 INFO L87 Difference]: Start difference. First operand 195 states and 217 transitions. Second operand 98 states. [2020-12-23 07:11:47,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:11:47,347 INFO L93 Difference]: Finished difference Result 249 states and 297 transitions. [2020-12-23 07:11:47,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2020-12-23 07:11:47,348 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 194 [2020-12-23 07:11:47,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:11:47,349 INFO L225 Difference]: With dead ends: 249 [2020-12-23 07:11:47,349 INFO L226 Difference]: Without dead ends: 200 [2020-12-23 07:11:47,350 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2020-12-23 07:11:47,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-12-23 07:11:47,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2020-12-23 07:11:47,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-12-23 07:11:47,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 222 transitions. [2020-12-23 07:11:47,354 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 222 transitions. Word has length 194 [2020-12-23 07:11:47,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:11:47,354 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 222 transitions. [2020-12-23 07:11:47,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 98 states. [2020-12-23 07:11:47,354 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 222 transitions. [2020-12-23 07:11:47,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2020-12-23 07:11:47,355 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:11:47,355 INFO L422 BasicCegarLoop]: trace histogram [96, 73, 23, 1, 1, 1, 1, 1, 1] [2020-12-23 07:11:47,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2020-12-23 07:11:47,566 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:11:47,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:11:47,567 INFO L82 PathProgramCache]: Analyzing trace with hash -228448449, now seen corresponding path program 70 times [2020-12-23 07:11:47,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:11:47,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861529808] [2020-12-23 07:11:47,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:11:47,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:11:51,275 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 3330 proven. 5402 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-12-23 07:11:51,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861529808] [2020-12-23 07:11:51,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458764668] [2020-12-23 07:11:51,276 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:11:51,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:11:51,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:11:51,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 75 conjunts are in the unsatisfiable core [2020-12-23 07:11:51,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:11:51,631 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 3330 proven. 5402 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-12-23 07:11:51,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:11:51,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 77 [2020-12-23 07:11:51,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13092695] [2020-12-23 07:11:51,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-12-23 07:11:51,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:11:51,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-12-23 07:11:51,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2020-12-23 07:11:51,634 INFO L87 Difference]: Start difference. First operand 199 states and 222 transitions. Second operand 77 states. [2020-12-23 07:11:52,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:11:52,010 INFO L93 Difference]: Finished difference Result 252 states and 299 transitions. [2020-12-23 07:11:52,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-12-23 07:11:52,013 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 198 [2020-12-23 07:11:52,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:11:52,014 INFO L225 Difference]: With dead ends: 252 [2020-12-23 07:11:52,015 INFO L226 Difference]: Without dead ends: 201 [2020-12-23 07:11:52,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2020-12-23 07:11:52,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-12-23 07:11:52,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2020-12-23 07:11:52,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-12-23 07:11:52,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 224 transitions. [2020-12-23 07:11:52,021 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 224 transitions. Word has length 198 [2020-12-23 07:11:52,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:11:52,021 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 224 transitions. [2020-12-23 07:11:52,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-12-23 07:11:52,021 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 224 transitions. [2020-12-23 07:11:52,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-12-23 07:11:52,022 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:11:52,023 INFO L422 BasicCegarLoop]: trace histogram [97, 74, 23, 1, 1, 1, 1, 1, 1] [2020-12-23 07:11:52,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:11:52,237 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:11:52,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:11:52,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1585148514, now seen corresponding path program 71 times [2020-12-23 07:11:52,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:11:52,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121923663] [2020-12-23 07:11:52,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:11:52,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:11:56,055 INFO L134 CoverageAnalysis]: Checked inductivity of 9409 backedges. 3375 proven. 5550 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-12-23 07:11:56,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121923663] [2020-12-23 07:11:56,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621740473] [2020-12-23 07:11:56,056 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:11:56,224 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 98 check-sat command(s) [2020-12-23 07:11:56,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:11:56,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 76 conjunts are in the unsatisfiable core [2020-12-23 07:11:56,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:11:56,470 INFO L134 CoverageAnalysis]: Checked inductivity of 9409 backedges. 3375 proven. 5550 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-12-23 07:11:56,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:11:56,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 78 [2020-12-23 07:11:56,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328923539] [2020-12-23 07:11:56,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-12-23 07:11:56,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:11:56,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-12-23 07:11:56,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-12-23 07:11:56,473 INFO L87 Difference]: Start difference. First operand 201 states and 224 transitions. Second operand 78 states. [2020-12-23 07:11:56,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:11:56,918 INFO L93 Difference]: Finished difference Result 254 states and 301 transitions. [2020-12-23 07:11:56,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-12-23 07:11:56,918 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 200 [2020-12-23 07:11:56,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:11:56,920 INFO L225 Difference]: With dead ends: 254 [2020-12-23 07:11:56,920 INFO L226 Difference]: Without dead ends: 203 [2020-12-23 07:11:56,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-12-23 07:11:56,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-12-23 07:11:56,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2020-12-23 07:11:56,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-12-23 07:11:56,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 226 transitions. [2020-12-23 07:11:56,926 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 226 transitions. Word has length 200 [2020-12-23 07:11:56,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:11:56,927 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 226 transitions. [2020-12-23 07:11:56,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-12-23 07:11:56,927 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 226 transitions. [2020-12-23 07:11:56,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-12-23 07:11:56,928 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:11:56,928 INFO L422 BasicCegarLoop]: trace histogram [98, 75, 23, 1, 1, 1, 1, 1, 1] [2020-12-23 07:11:57,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:11:57,143 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:11:57,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:11:57,144 INFO L82 PathProgramCache]: Analyzing trace with hash 695107781, now seen corresponding path program 72 times [2020-12-23 07:11:57,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:11:57,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982220442] [2020-12-23 07:11:57,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:11:57,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:12:01,059 INFO L134 CoverageAnalysis]: Checked inductivity of 9604 backedges. 3420 proven. 5700 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-12-23 07:12:01,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982220442] [2020-12-23 07:12:01,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456785638] [2020-12-23 07:12:01,060 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:12:01,268 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2020-12-23 07:12:01,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:12:01,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 07:12:01,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:12:04,321 INFO L134 CoverageAnalysis]: Checked inductivity of 9604 backedges. 3525 proven. 529 refuted. 0 times theorem prover too weak. 5550 trivial. 0 not checked. [2020-12-23 07:12:04,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:12:04,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 26] total 102 [2020-12-23 07:12:04,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124640202] [2020-12-23 07:12:04,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 102 states [2020-12-23 07:12:04,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:12:04,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2020-12-23 07:12:04,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2020-12-23 07:12:04,324 INFO L87 Difference]: Start difference. First operand 203 states and 226 transitions. Second operand 102 states. [2020-12-23 07:12:05,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:12:05,010 INFO L93 Difference]: Finished difference Result 259 states and 309 transitions. [2020-12-23 07:12:05,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2020-12-23 07:12:05,010 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 202 [2020-12-23 07:12:05,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:12:05,011 INFO L225 Difference]: With dead ends: 259 [2020-12-23 07:12:05,011 INFO L226 Difference]: Without dead ends: 208 [2020-12-23 07:12:05,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2020-12-23 07:12:05,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-12-23 07:12:05,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 207. [2020-12-23 07:12:05,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-12-23 07:12:05,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 231 transitions. [2020-12-23 07:12:05,017 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 231 transitions. Word has length 202 [2020-12-23 07:12:05,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:12:05,018 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 231 transitions. [2020-12-23 07:12:05,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 102 states. [2020-12-23 07:12:05,018 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 231 transitions. [2020-12-23 07:12:05,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-12-23 07:12:05,019 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:12:05,019 INFO L422 BasicCegarLoop]: trace histogram [100, 76, 24, 1, 1, 1, 1, 1, 1] [2020-12-23 07:12:05,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:12:05,235 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:12:05,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:12:05,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1864164045, now seen corresponding path program 73 times [2020-12-23 07:12:05,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:12:05,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398185606] [2020-12-23 07:12:05,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:12:05,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:12:09,282 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 3619 proven. 5852 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2020-12-23 07:12:09,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398185606] [2020-12-23 07:12:09,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062070444] [2020-12-23 07:12:09,283 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:12:09,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:12:09,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 78 conjunts are in the unsatisfiable core [2020-12-23 07:12:09,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:12:09,648 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 3619 proven. 5852 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2020-12-23 07:12:09,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:12:09,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 80 [2020-12-23 07:12:09,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341163453] [2020-12-23 07:12:09,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-12-23 07:12:09,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:12:09,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-12-23 07:12:09,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2020-12-23 07:12:09,651 INFO L87 Difference]: Start difference. First operand 207 states and 231 transitions. Second operand 80 states. [2020-12-23 07:12:10,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:12:10,067 INFO L93 Difference]: Finished difference Result 262 states and 311 transitions. [2020-12-23 07:12:10,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-12-23 07:12:10,068 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 206 [2020-12-23 07:12:10,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:12:10,069 INFO L225 Difference]: With dead ends: 262 [2020-12-23 07:12:10,070 INFO L226 Difference]: Without dead ends: 209 [2020-12-23 07:12:10,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2020-12-23 07:12:10,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-12-23 07:12:10,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2020-12-23 07:12:10,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-12-23 07:12:10,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 233 transitions. [2020-12-23 07:12:10,077 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 233 transitions. Word has length 206 [2020-12-23 07:12:10,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:12:10,077 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 233 transitions. [2020-12-23 07:12:10,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-12-23 07:12:10,077 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 233 transitions. [2020-12-23 07:12:10,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-12-23 07:12:10,078 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:12:10,079 INFO L422 BasicCegarLoop]: trace histogram [101, 77, 24, 1, 1, 1, 1, 1, 1] [2020-12-23 07:12:10,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-12-23 07:12:10,294 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:12:10,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:12:10,295 INFO L82 PathProgramCache]: Analyzing trace with hash 68573936, now seen corresponding path program 74 times [2020-12-23 07:12:10,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:12:10,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208372674] [2020-12-23 07:12:10,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:12:10,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:12:14,454 INFO L134 CoverageAnalysis]: Checked inductivity of 10201 backedges. 3666 proven. 6006 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2020-12-23 07:12:14,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208372674] [2020-12-23 07:12:14,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147482230] [2020-12-23 07:12:14,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:12:14,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:12:14,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:12:14,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 79 conjunts are in the unsatisfiable core [2020-12-23 07:12:14,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:12:14,815 INFO L134 CoverageAnalysis]: Checked inductivity of 10201 backedges. 3666 proven. 6006 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2020-12-23 07:12:14,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:12:14,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 81 [2020-12-23 07:12:14,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721115163] [2020-12-23 07:12:14,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-12-23 07:12:14,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:12:14,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-12-23 07:12:14,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2020-12-23 07:12:14,817 INFO L87 Difference]: Start difference. First operand 209 states and 233 transitions. Second operand 81 states. [2020-12-23 07:12:15,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:12:15,199 INFO L93 Difference]: Finished difference Result 264 states and 313 transitions. [2020-12-23 07:12:15,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-12-23 07:12:15,200 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 208 [2020-12-23 07:12:15,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:12:15,201 INFO L225 Difference]: With dead ends: 264 [2020-12-23 07:12:15,201 INFO L226 Difference]: Without dead ends: 211 [2020-12-23 07:12:15,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2020-12-23 07:12:15,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-12-23 07:12:15,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2020-12-23 07:12:15,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-12-23 07:12:15,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 235 transitions. [2020-12-23 07:12:15,207 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 235 transitions. Word has length 208 [2020-12-23 07:12:15,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:12:15,207 INFO L481 AbstractCegarLoop]: Abstraction has 211 states and 235 transitions. [2020-12-23 07:12:15,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2020-12-23 07:12:15,207 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 235 transitions. [2020-12-23 07:12:15,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-12-23 07:12:15,208 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:12:15,208 INFO L422 BasicCegarLoop]: trace histogram [102, 78, 24, 1, 1, 1, 1, 1, 1] [2020-12-23 07:12:15,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:12:15,410 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:12:15,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:12:15,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1083332179, now seen corresponding path program 75 times [2020-12-23 07:12:15,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:12:15,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917986545] [2020-12-23 07:12:15,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:12:15,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:12:19,696 INFO L134 CoverageAnalysis]: Checked inductivity of 10404 backedges. 3713 proven. 6162 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2020-12-23 07:12:19,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917986545] [2020-12-23 07:12:19,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45950904] [2020-12-23 07:12:19,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:12:19,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 50 check-sat command(s) [2020-12-23 07:12:19,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:12:19,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 07:12:19,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:12:23,113 INFO L134 CoverageAnalysis]: Checked inductivity of 10404 backedges. 3822 proven. 576 refuted. 0 times theorem prover too weak. 6006 trivial. 0 not checked. [2020-12-23 07:12:23,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:12:23,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 27] total 106 [2020-12-23 07:12:23,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685897703] [2020-12-23 07:12:23,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 106 states [2020-12-23 07:12:23,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:12:23,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2020-12-23 07:12:23,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2020-12-23 07:12:23,115 INFO L87 Difference]: Start difference. First operand 211 states and 235 transitions. Second operand 106 states. [2020-12-23 07:12:23,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:12:23,839 INFO L93 Difference]: Finished difference Result 269 states and 321 transitions. [2020-12-23 07:12:23,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2020-12-23 07:12:23,840 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 210 [2020-12-23 07:12:23,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:12:23,841 INFO L225 Difference]: With dead ends: 269 [2020-12-23 07:12:23,841 INFO L226 Difference]: Without dead ends: 216 [2020-12-23 07:12:23,842 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2020-12-23 07:12:23,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-12-23 07:12:23,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 215. [2020-12-23 07:12:23,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-12-23 07:12:23,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 240 transitions. [2020-12-23 07:12:23,847 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 240 transitions. Word has length 210 [2020-12-23 07:12:23,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:12:23,848 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 240 transitions. [2020-12-23 07:12:23,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 106 states. [2020-12-23 07:12:23,848 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 240 transitions. [2020-12-23 07:12:23,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-12-23 07:12:23,849 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:12:23,849 INFO L422 BasicCegarLoop]: trace histogram [104, 79, 25, 1, 1, 1, 1, 1, 1] [2020-12-23 07:12:24,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:12:24,063 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:12:24,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:12:24,064 INFO L82 PathProgramCache]: Analyzing trace with hash -974390821, now seen corresponding path program 76 times [2020-12-23 07:12:24,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:12:24,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141423338] [2020-12-23 07:12:24,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:12:24,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:12:28,499 INFO L134 CoverageAnalysis]: Checked inductivity of 10816 backedges. 3920 proven. 6320 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-12-23 07:12:28,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141423338] [2020-12-23 07:12:28,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867248310] [2020-12-23 07:12:28,500 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:12:28,609 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:12:28,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:12:28,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 81 conjunts are in the unsatisfiable core [2020-12-23 07:12:28,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:12:28,850 INFO L134 CoverageAnalysis]: Checked inductivity of 10816 backedges. 3920 proven. 6320 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-12-23 07:12:28,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:12:28,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 83 [2020-12-23 07:12:28,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450652116] [2020-12-23 07:12:28,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 83 states [2020-12-23 07:12:28,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:12:28,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2020-12-23 07:12:28,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2020-12-23 07:12:28,852 INFO L87 Difference]: Start difference. First operand 215 states and 240 transitions. Second operand 83 states. [2020-12-23 07:12:29,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:12:29,355 INFO L93 Difference]: Finished difference Result 272 states and 323 transitions. [2020-12-23 07:12:29,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-12-23 07:12:29,356 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 214 [2020-12-23 07:12:29,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:12:29,357 INFO L225 Difference]: With dead ends: 272 [2020-12-23 07:12:29,357 INFO L226 Difference]: Without dead ends: 217 [2020-12-23 07:12:29,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2020-12-23 07:12:29,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-12-23 07:12:29,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2020-12-23 07:12:29,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-12-23 07:12:29,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 242 transitions. [2020-12-23 07:12:29,361 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 242 transitions. Word has length 214 [2020-12-23 07:12:29,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:12:29,361 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 242 transitions. [2020-12-23 07:12:29,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 83 states. [2020-12-23 07:12:29,361 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 242 transitions. [2020-12-23 07:12:29,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-12-23 07:12:29,362 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:12:29,362 INFO L422 BasicCegarLoop]: trace histogram [105, 80, 25, 1, 1, 1, 1, 1, 1] [2020-12-23 07:12:29,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-12-23 07:12:29,576 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:12:29,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:12:29,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1421304066, now seen corresponding path program 77 times [2020-12-23 07:12:29,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:12:29,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496505778] [2020-12-23 07:12:29,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:12:29,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:12:34,113 INFO L134 CoverageAnalysis]: Checked inductivity of 11025 backedges. 3969 proven. 6480 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-12-23 07:12:34,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496505778] [2020-12-23 07:12:34,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079711251] [2020-12-23 07:12:34,113 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:12:34,297 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 106 check-sat command(s) [2020-12-23 07:12:34,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:12:34,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 82 conjunts are in the unsatisfiable core [2020-12-23 07:12:34,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:12:34,546 INFO L134 CoverageAnalysis]: Checked inductivity of 11025 backedges. 3969 proven. 6480 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-12-23 07:12:34,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:12:34,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 84 [2020-12-23 07:12:34,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265628009] [2020-12-23 07:12:34,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-12-23 07:12:34,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:12:34,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-12-23 07:12:34,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2020-12-23 07:12:34,548 INFO L87 Difference]: Start difference. First operand 217 states and 242 transitions. Second operand 84 states. [2020-12-23 07:12:35,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:12:35,056 INFO L93 Difference]: Finished difference Result 274 states and 325 transitions. [2020-12-23 07:12:35,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-12-23 07:12:35,057 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 216 [2020-12-23 07:12:35,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:12:35,059 INFO L225 Difference]: With dead ends: 274 [2020-12-23 07:12:35,059 INFO L226 Difference]: Without dead ends: 219 [2020-12-23 07:12:35,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2020-12-23 07:12:35,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-12-23 07:12:35,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2020-12-23 07:12:35,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-12-23 07:12:35,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 244 transitions. [2020-12-23 07:12:35,063 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 244 transitions. Word has length 216 [2020-12-23 07:12:35,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:12:35,063 INFO L481 AbstractCegarLoop]: Abstraction has 219 states and 244 transitions. [2020-12-23 07:12:35,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-12-23 07:12:35,063 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 244 transitions. [2020-12-23 07:12:35,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-12-23 07:12:35,064 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:12:35,064 INFO L422 BasicCegarLoop]: trace histogram [106, 81, 25, 1, 1, 1, 1, 1, 1] [2020-12-23 07:12:35,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:12:35,265 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:12:35,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:12:35,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1408202911, now seen corresponding path program 78 times [2020-12-23 07:12:35,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:12:35,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643963554] [2020-12-23 07:12:35,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:12:35,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:12:39,927 INFO L134 CoverageAnalysis]: Checked inductivity of 11236 backedges. 4018 proven. 6642 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-12-23 07:12:39,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643963554] [2020-12-23 07:12:39,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039967631] [2020-12-23 07:12:39,927 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:12:40,157 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 103 check-sat command(s) [2020-12-23 07:12:40,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:12:40,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 07:12:40,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:12:43,746 INFO L134 CoverageAnalysis]: Checked inductivity of 11236 backedges. 4131 proven. 625 refuted. 0 times theorem prover too weak. 6480 trivial. 0 not checked. [2020-12-23 07:12:43,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:12:43,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 28] total 110 [2020-12-23 07:12:43,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400010520] [2020-12-23 07:12:43,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 110 states [2020-12-23 07:12:43,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:12:43,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2020-12-23 07:12:43,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2020-12-23 07:12:43,749 INFO L87 Difference]: Start difference. First operand 219 states and 244 transitions. Second operand 110 states. [2020-12-23 07:12:44,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:12:44,625 INFO L93 Difference]: Finished difference Result 279 states and 333 transitions. [2020-12-23 07:12:44,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2020-12-23 07:12:44,625 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 218 [2020-12-23 07:12:44,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:12:44,626 INFO L225 Difference]: With dead ends: 279 [2020-12-23 07:12:44,626 INFO L226 Difference]: Without dead ends: 224 [2020-12-23 07:12:44,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2020-12-23 07:12:44,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-12-23 07:12:44,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 223. [2020-12-23 07:12:44,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-12-23 07:12:44,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 249 transitions. [2020-12-23 07:12:44,631 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 249 transitions. Word has length 218 [2020-12-23 07:12:44,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:12:44,631 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 249 transitions. [2020-12-23 07:12:44,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 110 states. [2020-12-23 07:12:44,631 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 249 transitions. [2020-12-23 07:12:44,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-12-23 07:12:44,632 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:12:44,632 INFO L422 BasicCegarLoop]: trace histogram [108, 82, 26, 1, 1, 1, 1, 1, 1] [2020-12-23 07:12:44,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:12:44,833 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:12:44,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:12:44,834 INFO L82 PathProgramCache]: Analyzing trace with hash -47215511, now seen corresponding path program 79 times [2020-12-23 07:12:44,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:12:44,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829774864] [2020-12-23 07:12:44,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:12:44,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:12:49,654 INFO L134 CoverageAnalysis]: Checked inductivity of 11664 backedges. 4233 proven. 6806 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2020-12-23 07:12:49,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829774864] [2020-12-23 07:12:49,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22099583] [2020-12-23 07:12:49,654 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:12:49,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:12:49,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 84 conjunts are in the unsatisfiable core [2020-12-23 07:12:49,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:12:50,052 INFO L134 CoverageAnalysis]: Checked inductivity of 11664 backedges. 4233 proven. 6806 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2020-12-23 07:12:50,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:12:50,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 86 [2020-12-23 07:12:50,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146272615] [2020-12-23 07:12:50,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-12-23 07:12:50,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:12:50,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-12-23 07:12:50,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2020-12-23 07:12:50,055 INFO L87 Difference]: Start difference. First operand 223 states and 249 transitions. Second operand 86 states. [2020-12-23 07:12:50,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:12:50,441 INFO L93 Difference]: Finished difference Result 282 states and 335 transitions. [2020-12-23 07:12:50,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-12-23 07:12:50,442 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 222 [2020-12-23 07:12:50,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:12:50,443 INFO L225 Difference]: With dead ends: 282 [2020-12-23 07:12:50,443 INFO L226 Difference]: Without dead ends: 225 [2020-12-23 07:12:50,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2020-12-23 07:12:50,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-12-23 07:12:50,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2020-12-23 07:12:50,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2020-12-23 07:12:50,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 251 transitions. [2020-12-23 07:12:50,448 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 251 transitions. Word has length 222 [2020-12-23 07:12:50,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:12:50,448 INFO L481 AbstractCegarLoop]: Abstraction has 225 states and 251 transitions. [2020-12-23 07:12:50,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-12-23 07:12:50,448 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 251 transitions. [2020-12-23 07:12:50,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2020-12-23 07:12:50,449 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:12:50,449 INFO L422 BasicCegarLoop]: trace histogram [109, 83, 26, 1, 1, 1, 1, 1, 1] [2020-12-23 07:12:50,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:12:50,650 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:12:50,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:12:50,651 INFO L82 PathProgramCache]: Analyzing trace with hash 661806732, now seen corresponding path program 80 times [2020-12-23 07:12:50,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:12:50,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833233353] [2020-12-23 07:12:50,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:12:50,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:12:55,609 INFO L134 CoverageAnalysis]: Checked inductivity of 11881 backedges. 4284 proven. 6972 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2020-12-23 07:12:55,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833233353] [2020-12-23 07:12:55,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097543] [2020-12-23 07:12:55,610 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:12:55,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:12:55,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:12:55,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 85 conjunts are in the unsatisfiable core [2020-12-23 07:12:55,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:12:55,979 INFO L134 CoverageAnalysis]: Checked inductivity of 11881 backedges. 4284 proven. 6972 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2020-12-23 07:12:55,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:12:55,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 87 [2020-12-23 07:12:55,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195834058] [2020-12-23 07:12:55,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 87 states [2020-12-23 07:12:55,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:12:55,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2020-12-23 07:12:55,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2020-12-23 07:12:55,981 INFO L87 Difference]: Start difference. First operand 225 states and 251 transitions. Second operand 87 states. [2020-12-23 07:12:56,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:12:56,531 INFO L93 Difference]: Finished difference Result 284 states and 337 transitions. [2020-12-23 07:12:56,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2020-12-23 07:12:56,532 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 224 [2020-12-23 07:12:56,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:12:56,533 INFO L225 Difference]: With dead ends: 284 [2020-12-23 07:12:56,533 INFO L226 Difference]: Without dead ends: 227 [2020-12-23 07:12:56,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2020-12-23 07:12:56,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-12-23 07:12:56,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2020-12-23 07:12:56,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-12-23 07:12:56,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 253 transitions. [2020-12-23 07:12:56,539 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 253 transitions. Word has length 224 [2020-12-23 07:12:56,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:12:56,539 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 253 transitions. [2020-12-23 07:12:56,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 87 states. [2020-12-23 07:12:56,539 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 253 transitions. [2020-12-23 07:12:56,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-12-23 07:12:56,540 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:12:56,541 INFO L422 BasicCegarLoop]: trace histogram [110, 84, 26, 1, 1, 1, 1, 1, 1] [2020-12-23 07:12:56,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:12:56,756 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:12:56,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:12:56,757 INFO L82 PathProgramCache]: Analyzing trace with hash -867617809, now seen corresponding path program 81 times [2020-12-23 07:12:56,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:12:56,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967007357] [2020-12-23 07:12:56,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:12:56,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:01,836 INFO L134 CoverageAnalysis]: Checked inductivity of 12100 backedges. 4335 proven. 7140 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2020-12-23 07:13:01,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967007357] [2020-12-23 07:13:01,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287359492] [2020-12-23 07:13:01,836 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:01,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2020-12-23 07:13:01,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:13:01,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 07:13:01,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:05,852 INFO L134 CoverageAnalysis]: Checked inductivity of 12100 backedges. 4452 proven. 676 refuted. 0 times theorem prover too weak. 6972 trivial. 0 not checked. [2020-12-23 07:13:05,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:13:05,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 29] total 114 [2020-12-23 07:13:05,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204121911] [2020-12-23 07:13:05,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 114 states [2020-12-23 07:13:05,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:05,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2020-12-23 07:13:05,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6441, Invalid=6441, Unknown=0, NotChecked=0, Total=12882 [2020-12-23 07:13:05,855 INFO L87 Difference]: Start difference. First operand 227 states and 253 transitions. Second operand 114 states. [2020-12-23 07:13:06,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:06,989 INFO L93 Difference]: Finished difference Result 289 states and 345 transitions. [2020-12-23 07:13:06,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2020-12-23 07:13:06,990 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 226 [2020-12-23 07:13:06,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:06,991 INFO L225 Difference]: With dead ends: 289 [2020-12-23 07:13:06,991 INFO L226 Difference]: Without dead ends: 232 [2020-12-23 07:13:06,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=6441, Invalid=6441, Unknown=0, NotChecked=0, Total=12882 [2020-12-23 07:13:06,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-12-23 07:13:06,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 231. [2020-12-23 07:13:06,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-12-23 07:13:06,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 258 transitions. [2020-12-23 07:13:06,996 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 258 transitions. Word has length 226 [2020-12-23 07:13:06,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:06,997 INFO L481 AbstractCegarLoop]: Abstraction has 231 states and 258 transitions. [2020-12-23 07:13:06,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 114 states. [2020-12-23 07:13:06,997 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 258 transitions. [2020-12-23 07:13:06,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2020-12-23 07:13:06,998 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:06,998 INFO L422 BasicCegarLoop]: trace histogram [112, 85, 27, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:07,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:07,199 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:07,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:07,207 INFO L82 PathProgramCache]: Analyzing trace with hash -356533641, now seen corresponding path program 82 times [2020-12-23 07:13:07,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:07,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174714537] [2020-12-23 07:13:07,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:07,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:12,457 INFO L134 CoverageAnalysis]: Checked inductivity of 12544 backedges. 4558 proven. 7310 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2020-12-23 07:13:12,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174714537] [2020-12-23 07:13:12,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561046490] [2020-12-23 07:13:12,458 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:12,582 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:13:12,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:13:12,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 87 conjunts are in the unsatisfiable core [2020-12-23 07:13:12,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:12,858 INFO L134 CoverageAnalysis]: Checked inductivity of 12544 backedges. 4558 proven. 7310 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2020-12-23 07:13:12,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:13:12,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 89 [2020-12-23 07:13:12,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739352095] [2020-12-23 07:13:12,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 89 states [2020-12-23 07:13:12,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:12,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2020-12-23 07:13:12,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2020-12-23 07:13:12,861 INFO L87 Difference]: Start difference. First operand 231 states and 258 transitions. Second operand 89 states. [2020-12-23 07:13:13,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:13,251 INFO L93 Difference]: Finished difference Result 292 states and 347 transitions. [2020-12-23 07:13:13,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2020-12-23 07:13:13,252 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 230 [2020-12-23 07:13:13,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:13,254 INFO L225 Difference]: With dead ends: 292 [2020-12-23 07:13:13,254 INFO L226 Difference]: Without dead ends: 233 [2020-12-23 07:13:13,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2020-12-23 07:13:13,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-12-23 07:13:13,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2020-12-23 07:13:13,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-12-23 07:13:13,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 260 transitions. [2020-12-23 07:13:13,260 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 260 transitions. Word has length 230 [2020-12-23 07:13:13,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:13,260 INFO L481 AbstractCegarLoop]: Abstraction has 233 states and 260 transitions. [2020-12-23 07:13:13,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 89 states. [2020-12-23 07:13:13,260 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 260 transitions. [2020-12-23 07:13:13,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2020-12-23 07:13:13,261 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:13,261 INFO L422 BasicCegarLoop]: trace histogram [113, 86, 27, 1, 1, 1, 1, 1, 1]