/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_13.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 07:07:10,280 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 07:07:10,283 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 07:07:10,338 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 07:07:10,339 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 07:07:10,343 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 07:07:10,347 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 07:07:10,354 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 07:07:10,358 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 07:07:10,365 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 07:07:10,369 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 07:07:10,371 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 07:07:10,371 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 07:07:10,375 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 07:07:10,377 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 07:07:10,379 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 07:07:10,401 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 07:07:10,402 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 07:07:10,405 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 07:07:10,407 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 07:07:10,409 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 07:07:10,411 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 07:07:10,412 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 07:07:10,413 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 07:07:10,416 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 07:07:10,421 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 07:07:10,422 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 07:07:10,423 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 07:07:10,424 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 07:07:10,426 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 07:07:10,426 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 07:07:10,427 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 07:07:10,428 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 07:07:10,428 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 07:07:10,430 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 07:07:10,430 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 07:07:10,432 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 07:07:10,461 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 07:07:10,461 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 07:07:10,463 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 07:07:10,463 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 07:07:10,464 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 07:07:10,464 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 07:07:10,464 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 07:07:10,464 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 07:07:10,465 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 07:07:10,465 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 07:07:10,465 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 07:07:10,465 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 07:07:10,466 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 07:07:10,466 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 07:07:10,466 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 07:07:10,467 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 07:07:10,467 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 07:07:10,467 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 07:07:10,468 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 07:07:10,468 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 07:07:10,468 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 07:07:10,468 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 07:07:10,469 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 07:07:10,469 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 07:07:10,469 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 07:07:10,469 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 07:07:10,898 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 07:07:10,929 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 07:07:10,933 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 07:07:10,934 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 07:07:10,935 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 07:07:10,937 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/mono-crafted_13.c [2020-12-23 07:07:11,038 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d6e2320eb/c1851c6cc8364d15ad45cdfa42d6a4d2/FLAGb50d54b4a [2020-12-23 07:07:11,646 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 07:07:11,646 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/mono-crafted_13.c [2020-12-23 07:07:11,653 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d6e2320eb/c1851c6cc8364d15ad45cdfa42d6a4d2/FLAGb50d54b4a [2020-12-23 07:07:12,028 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d6e2320eb/c1851c6cc8364d15ad45cdfa42d6a4d2 [2020-12-23 07:07:12,031 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 07:07:12,033 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 07:07:12,035 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 07:07:12,035 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 07:07:12,040 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 07:07:12,041 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:07:12" (1/1) ... [2020-12-23 07:07:12,042 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5af8d1db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:07:12, skipping insertion in model container [2020-12-23 07:07:12,042 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:07:12" (1/1) ... [2020-12-23 07:07:12,053 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 07:07:12,067 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 07:07:12,209 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_13.c[319,332] 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 07:07:12,226 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:07:12,237 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 07:07:12,251 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_13.c[319,332] 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 07:07:12,256 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:07:12,272 INFO L208 MainTranslator]: Completed translation [2020-12-23 07:07:12,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:07:12 WrapperNode [2020-12-23 07:07:12,273 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 07:07:12,274 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 07:07:12,274 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 07:07:12,275 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 07:07:12,283 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:07:12" (1/1) ... [2020-12-23 07:07:12,291 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:07:12" (1/1) ... [2020-12-23 07:07:12,311 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 07:07:12,312 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 07:07:12,312 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 07:07:12,312 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 07:07:12,321 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:07:12" (1/1) ... [2020-12-23 07:07:12,322 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:07:12" (1/1) ... [2020-12-23 07:07:12,323 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:07:12" (1/1) ... [2020-12-23 07:07:12,323 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:07:12" (1/1) ... [2020-12-23 07:07:12,327 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:07:12" (1/1) ... [2020-12-23 07:07:12,332 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:07:12" (1/1) ... [2020-12-23 07:07:12,333 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:07:12" (1/1) ... [2020-12-23 07:07:12,334 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 07:07:12,336 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 07:07:12,336 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 07:07:12,336 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 07:07:12,337 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:07:12" (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 07:07:12,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 07:07:12,445 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 07:07:12,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 07:07:12,446 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 07:07:12,723 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 07:07:12,724 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-23 07:07:12,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:07:12 BoogieIcfgContainer [2020-12-23 07:07:12,726 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 07:07:12,728 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 07:07:12,728 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 07:07:12,732 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 07:07:12,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 07:07:12" (1/3) ... [2020-12-23 07:07:12,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5da5d238 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:07:12, skipping insertion in model container [2020-12-23 07:07:12,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:07:12" (2/3) ... [2020-12-23 07:07:12,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5da5d238 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:07:12, skipping insertion in model container [2020-12-23 07:07:12,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:07:12" (3/3) ... [2020-12-23 07:07:12,736 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_13.c [2020-12-23 07:07:12,782 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 07:07:12,789 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 07:07:12,814 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 07:07:12,887 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 07:07:12,888 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 07:07:12,888 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 07:07:12,891 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 07:07:12,891 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 07:07:12,891 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 07:07:12,892 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 07:07:12,892 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 07:07:12,920 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-12-23 07:07:12,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 07:07:12,931 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:12,932 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:12,933 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:12,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:12,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1818421976, now seen corresponding path program 1 times [2020-12-23 07:07:12,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:12,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557692943] [2020-12-23 07:07:12,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:13,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:13,189 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 07:07:13,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557692943] [2020-12-23 07:07:13,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:07:13,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 07:07:13,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227255042] [2020-12-23 07:07:13,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 07:07:13,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:13,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 07:07:13,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 07:07:13,228 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2020-12-23 07:07:13,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:13,249 INFO L93 Difference]: Finished difference Result 22 states and 29 transitions. [2020-12-23 07:07:13,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 07:07:13,251 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2020-12-23 07:07:13,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:13,281 INFO L225 Difference]: With dead ends: 22 [2020-12-23 07:07:13,281 INFO L226 Difference]: Without dead ends: 9 [2020-12-23 07:07:13,289 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 07:07:13,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-12-23 07:07:13,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-12-23 07:07:13,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-12-23 07:07:13,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2020-12-23 07:07:13,329 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 7 [2020-12-23 07:07:13,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:13,330 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2020-12-23 07:07:13,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 07:07:13,330 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2020-12-23 07:07:13,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 07:07:13,331 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:13,332 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:13,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 07:07:13,333 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:13,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:13,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1809186766, now seen corresponding path program 1 times [2020-12-23 07:07:13,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:13,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765078936] [2020-12-23 07:07:13,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:13,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:13,484 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 07:07:13,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765078936] [2020-12-23 07:07:13,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:07:13,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 07:07:13,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228039655] [2020-12-23 07:07:13,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 07:07:13,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:13,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 07:07:13,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 07:07:13,492 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand 3 states. [2020-12-23 07:07:13,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:13,563 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2020-12-23 07:07:13,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 07:07:13,564 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-23 07:07:13,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:13,565 INFO L225 Difference]: With dead ends: 18 [2020-12-23 07:07:13,565 INFO L226 Difference]: Without dead ends: 11 [2020-12-23 07:07:13,566 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 07:07:13,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-12-23 07:07:13,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-12-23 07:07:13,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-23 07:07:13,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2020-12-23 07:07:13,572 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 7 [2020-12-23 07:07:13,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:13,573 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2020-12-23 07:07:13,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 07:07:13,573 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2020-12-23 07:07:13,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 07:07:13,575 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:13,575 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:13,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 07:07:13,576 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:13,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:13,578 INFO L82 PathProgramCache]: Analyzing trace with hash 576672011, now seen corresponding path program 1 times [2020-12-23 07:07:13,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:13,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453881440] [2020-12-23 07:07:13,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:13,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:13,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:07:13,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453881440] [2020-12-23 07:07:13,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:07:13,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 07:07:13,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855470423] [2020-12-23 07:07:13,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 07:07:13,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:13,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 07:07:13,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 07:07:13,655 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 3 states. [2020-12-23 07:07:13,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:13,672 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2020-12-23 07:07:13,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 07:07:13,673 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-12-23 07:07:13,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:13,674 INFO L225 Difference]: With dead ends: 16 [2020-12-23 07:07:13,674 INFO L226 Difference]: Without dead ends: 12 [2020-12-23 07:07:13,675 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 07:07:13,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-23 07:07:13,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-12-23 07:07:13,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-23 07:07:13,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2020-12-23 07:07:13,679 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2020-12-23 07:07:13,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:13,679 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2020-12-23 07:07:13,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 07:07:13,680 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2020-12-23 07:07:13,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 07:07:13,680 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:13,681 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:13,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 07:07:13,681 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:13,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:13,682 INFO L82 PathProgramCache]: Analyzing trace with hash 698628545, now seen corresponding path program 1 times [2020-12-23 07:07:13,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:13,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150106845] [2020-12-23 07:07:13,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:13,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:13,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:07:13,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150106845] [2020-12-23 07:07:13,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383253230] [2020-12-23 07:07:13,738 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 07:07:13,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:13,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 07:07:13,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:13,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:07:13,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:13,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 07:07:13,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310279837] [2020-12-23 07:07:13,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 07:07:13,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:13,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 07:07:13,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:07:13,914 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 5 states. [2020-12-23 07:07:13,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:13,964 INFO L93 Difference]: Finished difference Result 22 states and 28 transitions. [2020-12-23 07:07:13,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 07:07:13,965 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-23 07:07:13,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:13,966 INFO L225 Difference]: With dead ends: 22 [2020-12-23 07:07:13,966 INFO L226 Difference]: Without dead ends: 14 [2020-12-23 07:07:13,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 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 07:07:13,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-23 07:07:13,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-23 07:07:13,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-23 07:07:13,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-12-23 07:07:13,971 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2020-12-23 07:07:13,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:13,972 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-12-23 07:07:13,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 07:07:13,972 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-12-23 07:07:13,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 07:07:13,973 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:13,973 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:14,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:14,187 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:14,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:14,188 INFO L82 PathProgramCache]: Analyzing trace with hash 526975844, now seen corresponding path program 2 times [2020-12-23 07:07:14,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:14,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278278360] [2020-12-23 07:07:14,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:14,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:14,224 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 07:07:14,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278278360] [2020-12-23 07:07:14,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:07:14,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 07:07:14,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649545646] [2020-12-23 07:07:14,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 07:07:14,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:14,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 07:07:14,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 07:07:14,228 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 3 states. [2020-12-23 07:07:14,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:14,261 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2020-12-23 07:07:14,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 07:07:14,262 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-12-23 07:07:14,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:14,263 INFO L225 Difference]: With dead ends: 22 [2020-12-23 07:07:14,263 INFO L226 Difference]: Without dead ends: 16 [2020-12-23 07:07:14,264 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 07:07:14,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-23 07:07:14,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-12-23 07:07:14,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-23 07:07:14,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-12-23 07:07:14,269 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 12 [2020-12-23 07:07:14,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:14,269 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-12-23 07:07:14,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 07:07:14,270 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-12-23 07:07:14,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 07:07:14,271 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:14,271 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:14,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-23 07:07:14,271 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:14,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:14,272 INFO L82 PathProgramCache]: Analyzing trace with hash 552494793, now seen corresponding path program 1 times [2020-12-23 07:07:14,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:14,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915539484] [2020-12-23 07:07:14,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:14,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:14,347 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:07:14,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915539484] [2020-12-23 07:07:14,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860521325] [2020-12-23 07:07:14,348 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 07:07:14,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:14,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 07:07:14,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:14,484 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:07:14,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:14,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 07:07:14,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913989839] [2020-12-23 07:07:14,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:07:14,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:14,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:07:14,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:07:14,487 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 6 states. [2020-12-23 07:07:14,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:14,532 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2020-12-23 07:07:14,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 07:07:14,533 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-12-23 07:07:14,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:14,534 INFO L225 Difference]: With dead ends: 26 [2020-12-23 07:07:14,534 INFO L226 Difference]: Without dead ends: 17 [2020-12-23 07:07:14,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 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 07:07:14,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-23 07:07:14,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-23 07:07:14,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-23 07:07:14,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-12-23 07:07:14,539 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2020-12-23 07:07:14,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:14,540 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-12-23 07:07:14,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:07:14,540 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-12-23 07:07:14,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 07:07:14,541 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:14,541 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:14,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:14,756 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:14,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:14,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1373657364, now seen corresponding path program 2 times [2020-12-23 07:07:14,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:14,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577668528] [2020-12-23 07:07:14,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:14,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:14,850 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:07:14,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577668528] [2020-12-23 07:07:14,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405908849] [2020-12-23 07:07:14,851 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 07:07:14,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:07:14,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:14,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 07:07:14,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:14,996 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:07:14,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:14,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 07:07:14,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634886158] [2020-12-23 07:07:14,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 07:07:14,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:14,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 07:07:14,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:07:15,000 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 7 states. [2020-12-23 07:07:15,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:15,118 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2020-12-23 07:07:15,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 07:07:15,122 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-12-23 07:07:15,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:15,122 INFO L225 Difference]: With dead ends: 28 [2020-12-23 07:07:15,122 INFO L226 Difference]: Without dead ends: 19 [2020-12-23 07:07:15,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:07:15,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-23 07:07:15,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-12-23 07:07:15,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-23 07:07:15,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-12-23 07:07:15,137 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2020-12-23 07:07:15,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:15,137 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-12-23 07:07:15,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 07:07:15,137 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-12-23 07:07:15,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 07:07:15,138 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:15,138 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:15,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:15,352 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:15,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:15,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1274975665, now seen corresponding path program 3 times [2020-12-23 07:07:15,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:15,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854022713] [2020-12-23 07:07:15,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:15,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:15,445 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:07:15,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854022713] [2020-12-23 07:07:15,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108661690] [2020-12-23 07:07:15,453 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 07:07:15,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 07:07:15,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:15,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 07:07:15,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:15,654 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-23 07:07:15,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:15,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2020-12-23 07:07:15,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169056028] [2020-12-23 07:07:15,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 07:07:15,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:15,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 07:07:15,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:07:15,657 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 10 states. [2020-12-23 07:07:15,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:15,906 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2020-12-23 07:07:15,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 07:07:15,907 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-12-23 07:07:15,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:15,910 INFO L225 Difference]: With dead ends: 34 [2020-12-23 07:07:15,910 INFO L226 Difference]: Without dead ends: 25 [2020-12-23 07:07:15,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-23 07:07:15,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-23 07:07:15,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2020-12-23 07:07:15,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-23 07:07:15,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-12-23 07:07:15,925 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 18 [2020-12-23 07:07:15,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:15,925 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-12-23 07:07:15,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 07:07:15,925 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-12-23 07:07:15,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 07:07:15,932 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:15,932 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:16,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:16,148 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:16,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:16,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1422353934, now seen corresponding path program 4 times [2020-12-23 07:07:16,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:16,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063745350] [2020-12-23 07:07:16,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:16,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:16,278 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 07:07:16,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063745350] [2020-12-23 07:07:16,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792293374] [2020-12-23 07:07:16,279 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 07:07:16,366 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:07:16,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:16,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 07:07:16,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:16,444 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 07:07:16,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:16,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-23 07:07:16,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398995010] [2020-12-23 07:07:16,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 07:07:16,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:16,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 07:07:16,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:07:16,446 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 9 states. [2020-12-23 07:07:16,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:16,514 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2020-12-23 07:07:16,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 07:07:16,515 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-12-23 07:07:16,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:16,515 INFO L225 Difference]: With dead ends: 36 [2020-12-23 07:07:16,516 INFO L226 Difference]: Without dead ends: 25 [2020-12-23 07:07:16,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:07:16,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-23 07:07:16,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-12-23 07:07:16,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-23 07:07:16,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-12-23 07:07:16,521 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 22 [2020-12-23 07:07:16,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:16,521 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-12-23 07:07:16,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 07:07:16,522 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-12-23 07:07:16,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 07:07:16,522 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:16,522 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:16,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:16,736 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:16,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:16,737 INFO L82 PathProgramCache]: Analyzing trace with hash -662370539, now seen corresponding path program 5 times [2020-12-23 07:07:16,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:16,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998643264] [2020-12-23 07:07:16,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:16,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:16,847 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 07:07:16,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998643264] [2020-12-23 07:07:16,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210514420] [2020-12-23 07:07:16,848 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 07:07:16,921 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-12-23 07:07:16,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:16,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 07:07:16,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:16,983 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 07:07:16,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:16,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 07:07:16,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041435329] [2020-12-23 07:07:16,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 07:07:16,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:16,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 07:07:16,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:07:16,986 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 10 states. [2020-12-23 07:07:17,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:17,040 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-12-23 07:07:17,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 07:07:17,041 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-12-23 07:07:17,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:17,042 INFO L225 Difference]: With dead ends: 38 [2020-12-23 07:07:17,042 INFO L226 Difference]: Without dead ends: 27 [2020-12-23 07:07:17,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:07:17,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-23 07:07:17,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-23 07:07:17,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 07:07:17,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-12-23 07:07:17,048 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 24 [2020-12-23 07:07:17,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:17,049 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-12-23 07:07:17,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 07:07:17,049 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-12-23 07:07:17,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 07:07:17,050 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:17,050 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:17,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:17,264 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:17,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:17,266 INFO L82 PathProgramCache]: Analyzing trace with hash -462768264, now seen corresponding path program 6 times [2020-12-23 07:07:17,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:17,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96236045] [2020-12-23 07:07:17,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:17,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:17,367 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 07:07:17,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96236045] [2020-12-23 07:07:17,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987846728] [2020-12-23 07:07:17,369 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 07:07:17,427 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-23 07:07:17,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:17,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 07:07:17,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:17,555 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-12-23 07:07:17,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:17,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2020-12-23 07:07:17,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581880809] [2020-12-23 07:07:17,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 07:07:17,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:17,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 07:07:17,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-12-23 07:07:17,558 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 14 states. [2020-12-23 07:07:17,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:17,751 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2020-12-23 07:07:17,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 07:07:17,751 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2020-12-23 07:07:17,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:17,752 INFO L225 Difference]: With dead ends: 43 [2020-12-23 07:07:17,752 INFO L226 Difference]: Without dead ends: 32 [2020-12-23 07:07:17,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=307, Unknown=0, NotChecked=0, Total=462 [2020-12-23 07:07:17,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-23 07:07:17,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-12-23 07:07:17,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 07:07:17,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-12-23 07:07:17,758 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 26 [2020-12-23 07:07:17,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:17,759 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-12-23 07:07:17,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 07:07:17,759 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-12-23 07:07:17,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 07:07:17,760 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:17,760 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:17,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:17,974 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:17,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:17,975 INFO L82 PathProgramCache]: Analyzing trace with hash 657387953, now seen corresponding path program 7 times [2020-12-23 07:07:17,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:17,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223292140] [2020-12-23 07:07:17,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:17,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:18,076 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-23 07:07:18,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223292140] [2020-12-23 07:07:18,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472756937] [2020-12-23 07:07:18,076 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 07:07:18,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:18,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 07:07:18,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:18,181 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-23 07:07:18,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:18,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 07:07:18,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814873150] [2020-12-23 07:07:18,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 07:07:18,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:18,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 07:07:18,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:07:18,184 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 12 states. [2020-12-23 07:07:18,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:18,249 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2020-12-23 07:07:18,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 07:07:18,249 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2020-12-23 07:07:18,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:18,250 INFO L225 Difference]: With dead ends: 44 [2020-12-23 07:07:18,250 INFO L226 Difference]: Without dead ends: 32 [2020-12-23 07:07:18,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:07:18,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-23 07:07:18,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-23 07:07:18,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-23 07:07:18,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-12-23 07:07:18,256 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 29 [2020-12-23 07:07:18,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:18,256 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-12-23 07:07:18,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 07:07:18,257 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-12-23 07:07:18,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 07:07:18,257 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:18,258 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:18,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 07:07:18,473 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:18,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:18,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1069086930, now seen corresponding path program 8 times [2020-12-23 07:07:18,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:18,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082530547] [2020-12-23 07:07:18,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:18,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:18,612 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-23 07:07:18,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082530547] [2020-12-23 07:07:18,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456119891] [2020-12-23 07:07:18,613 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 07:07:18,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:07:18,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:18,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 07:07:18,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:18,765 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-23 07:07:18,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:18,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 07:07:18,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739341388] [2020-12-23 07:07:18,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 07:07:18,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:18,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 07:07:18,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:07:18,769 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 13 states. [2020-12-23 07:07:18,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:18,823 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2020-12-23 07:07:18,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 07:07:18,824 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-12-23 07:07:18,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:18,827 INFO L225 Difference]: With dead ends: 46 [2020-12-23 07:07:18,827 INFO L226 Difference]: Without dead ends: 34 [2020-12-23 07:07:18,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 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 07:07:18,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-23 07:07:18,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-12-23 07:07:18,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-23 07:07:18,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-12-23 07:07:18,847 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 31 [2020-12-23 07:07:18,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:18,847 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-12-23 07:07:18,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 07:07:18,848 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-12-23 07:07:18,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 07:07:18,850 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:18,850 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:19,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:19,065 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:19,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:19,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1940894059, now seen corresponding path program 9 times [2020-12-23 07:07:19,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:19,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864421753] [2020-12-23 07:07:19,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:19,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:19,186 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-23 07:07:19,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864421753] [2020-12-23 07:07:19,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423184163] [2020-12-23 07:07:19,187 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 07:07:19,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 07:07:19,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:19,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 07:07:19,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:19,383 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-12-23 07:07:19,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:19,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 18 [2020-12-23 07:07:19,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152659263] [2020-12-23 07:07:19,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 07:07:19,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:19,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 07:07:19,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2020-12-23 07:07:19,386 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 18 states. [2020-12-23 07:07:19,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:19,648 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2020-12-23 07:07:19,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 07:07:19,649 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 33 [2020-12-23 07:07:19,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:19,649 INFO L225 Difference]: With dead ends: 51 [2020-12-23 07:07:19,649 INFO L226 Difference]: Without dead ends: 39 [2020-12-23 07:07:19,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=274, Invalid=538, Unknown=0, NotChecked=0, Total=812 [2020-12-23 07:07:19,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-23 07:07:19,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2020-12-23 07:07:19,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-23 07:07:19,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-12-23 07:07:19,655 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 33 [2020-12-23 07:07:19,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:19,656 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-12-23 07:07:19,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 07:07:19,656 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-12-23 07:07:19,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-23 07:07:19,657 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:19,657 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:19,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:19,871 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:19,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:19,872 INFO L82 PathProgramCache]: Analyzing trace with hash 56276484, now seen corresponding path program 10 times [2020-12-23 07:07:19,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:19,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832675870] [2020-12-23 07:07:19,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:19,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:20,005 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 07:07:20,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832675870] [2020-12-23 07:07:20,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771966519] [2020-12-23 07:07:20,006 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 07:07:20,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:07:20,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:20,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 07:07:20,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:20,111 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 07:07:20,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:20,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-23 07:07:20,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127182400] [2020-12-23 07:07:20,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 07:07:20,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:20,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 07:07:20,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 07:07:20,113 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 15 states. [2020-12-23 07:07:20,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:20,162 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2020-12-23 07:07:20,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 07:07:20,162 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2020-12-23 07:07:20,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:20,163 INFO L225 Difference]: With dead ends: 52 [2020-12-23 07:07:20,164 INFO L226 Difference]: Without dead ends: 39 [2020-12-23 07:07:20,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 07:07:20,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-23 07:07:20,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-12-23 07:07:20,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-23 07:07:20,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-12-23 07:07:20,172 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 36 [2020-12-23 07:07:20,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:20,173 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-12-23 07:07:20,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 07:07:20,173 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-12-23 07:07:20,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 07:07:20,173 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:20,174 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:20,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 07:07:20,387 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:20,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:20,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1327240729, now seen corresponding path program 11 times [2020-12-23 07:07:20,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:20,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566345] [2020-12-23 07:07:20,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:20,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:20,545 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 07:07:20,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566345] [2020-12-23 07:07:20,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569002506] [2020-12-23 07:07:20,546 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 07:07:20,621 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-12-23 07:07:20,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:20,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 07:07:20,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:20,682 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 07:07:20,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:20,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-23 07:07:20,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831133068] [2020-12-23 07:07:20,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 07:07:20,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:20,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 07:07:20,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 07:07:20,685 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 16 states. [2020-12-23 07:07:20,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:20,783 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2020-12-23 07:07:20,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 07:07:20,783 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-12-23 07:07:20,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:20,784 INFO L225 Difference]: With dead ends: 54 [2020-12-23 07:07:20,784 INFO L226 Difference]: Without dead ends: 41 [2020-12-23 07:07:20,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 07:07:20,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-23 07:07:20,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-12-23 07:07:20,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-23 07:07:20,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-12-23 07:07:20,790 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 38 [2020-12-23 07:07:20,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:20,790 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-12-23 07:07:20,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 07:07:20,790 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-12-23 07:07:20,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 07:07:20,791 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:20,791 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:21,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 07:07:21,006 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:21,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:21,007 INFO L82 PathProgramCache]: Analyzing trace with hash 552579338, now seen corresponding path program 12 times [2020-12-23 07:07:21,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:21,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017352180] [2020-12-23 07:07:21,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:21,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:21,168 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 07:07:21,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017352180] [2020-12-23 07:07:21,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914926206] [2020-12-23 07:07:21,169 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 07:07:21,220 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 07:07:21,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:21,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 07:07:21,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:21,377 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2020-12-23 07:07:21,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:21,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8] total 22 [2020-12-23 07:07:21,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218822785] [2020-12-23 07:07:21,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 07:07:21,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:21,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 07:07:21,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-12-23 07:07:21,380 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 22 states. [2020-12-23 07:07:21,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:21,767 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2020-12-23 07:07:21,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 07:07:21,768 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 40 [2020-12-23 07:07:21,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:21,769 INFO L225 Difference]: With dead ends: 59 [2020-12-23 07:07:21,769 INFO L226 Difference]: Without dead ends: 46 [2020-12-23 07:07:21,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=427, Invalid=833, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 07:07:21,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-23 07:07:21,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-12-23 07:07:21,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-23 07:07:21,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-12-23 07:07:21,775 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 40 [2020-12-23 07:07:21,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:21,775 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-12-23 07:07:21,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 07:07:21,776 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-12-23 07:07:21,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-23 07:07:21,776 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:21,776 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:21,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 07:07:21,992 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:21,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:21,993 INFO L82 PathProgramCache]: Analyzing trace with hash -407200865, now seen corresponding path program 13 times [2020-12-23 07:07:21,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:21,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57925749] [2020-12-23 07:07:21,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:22,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:22,187 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-23 07:07:22,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57925749] [2020-12-23 07:07:22,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388160151] [2020-12-23 07:07:22,188 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 07:07:22,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:22,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 07:07:22,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:22,302 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-23 07:07:22,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:22,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-23 07:07:22,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85159540] [2020-12-23 07:07:22,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 07:07:22,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:22,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 07:07:22,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 07:07:22,304 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 18 states. [2020-12-23 07:07:22,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:22,365 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2020-12-23 07:07:22,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 07:07:22,365 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 43 [2020-12-23 07:07:22,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:22,366 INFO L225 Difference]: With dead ends: 60 [2020-12-23 07:07:22,366 INFO L226 Difference]: Without dead ends: 46 [2020-12-23 07:07:22,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 43 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 07:07:22,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-23 07:07:22,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-12-23 07:07:22,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 07:07:22,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-12-23 07:07:22,372 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 43 [2020-12-23 07:07:22,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:22,372 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-12-23 07:07:22,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 07:07:22,372 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-12-23 07:07:22,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-23 07:07:22,373 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:22,373 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:22,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:22,587 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:22,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:22,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1767058852, now seen corresponding path program 14 times [2020-12-23 07:07:22,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:22,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936444918] [2020-12-23 07:07:22,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:22,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:22,830 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-23 07:07:22,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936444918] [2020-12-23 07:07:22,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406259700] [2020-12-23 07:07:22,831 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 07:07:22,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:07:22,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:22,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 07:07:22,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:22,968 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-23 07:07:22,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:22,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-23 07:07:22,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662604467] [2020-12-23 07:07:22,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 07:07:22,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:22,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 07:07:22,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 07:07:22,972 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 19 states. [2020-12-23 07:07:23,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:23,034 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2020-12-23 07:07:23,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 07:07:23,035 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 45 [2020-12-23 07:07:23,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:23,036 INFO L225 Difference]: With dead ends: 62 [2020-12-23 07:07:23,036 INFO L226 Difference]: Without dead ends: 48 [2020-12-23 07:07:23,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 07:07:23,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-23 07:07:23,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-12-23 07:07:23,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-23 07:07:23,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-12-23 07:07:23,049 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 45 [2020-12-23 07:07:23,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:23,049 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-12-23 07:07:23,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 07:07:23,050 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-12-23 07:07:23,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-23 07:07:23,050 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:23,050 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:23,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:23,264 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:23,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:23,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1374440921, now seen corresponding path program 15 times [2020-12-23 07:07:23,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:23,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639607409] [2020-12-23 07:07:23,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:23,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:23,520 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-23 07:07:23,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639607409] [2020-12-23 07:07:23,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422561130] [2020-12-23 07:07:23,521 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 07:07:23,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 07:07:23,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:23,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 07:07:23,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:23,654 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 48 proven. 1 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2020-12-23 07:07:23,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:23,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 4] total 21 [2020-12-23 07:07:23,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564151899] [2020-12-23 07:07:23,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 07:07:23,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:23,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 07:07:23,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 07:07:23,656 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 21 states. [2020-12-23 07:07:23,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:23,775 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2020-12-23 07:07:23,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 07:07:23,776 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 47 [2020-12-23 07:07:23,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:23,778 INFO L225 Difference]: With dead ends: 67 [2020-12-23 07:07:23,779 INFO L226 Difference]: Without dead ends: 53 [2020-12-23 07:07:23,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 07:07:23,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-23 07:07:23,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-12-23 07:07:23,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-23 07:07:23,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2020-12-23 07:07:23,802 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 47 [2020-12-23 07:07:23,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:23,803 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2020-12-23 07:07:23,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 07:07:23,803 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2020-12-23 07:07:23,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-23 07:07:23,805 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:23,805 INFO L422 BasicCegarLoop]: trace histogram [19, 17, 6, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:24,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:24,020 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:24,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:24,021 INFO L82 PathProgramCache]: Analyzing trace with hash -824056239, now seen corresponding path program 16 times [2020-12-23 07:07:24,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:24,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189043010] [2020-12-23 07:07:24,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:24,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:24,278 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 54 proven. 306 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-23 07:07:24,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189043010] [2020-12-23 07:07:24,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975519487] [2020-12-23 07:07:24,279 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 07:07:24,339 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:07:24,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:24,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 07:07:24,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:24,418 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 54 proven. 306 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-23 07:07:24,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:24,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-23 07:07:24,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905395057] [2020-12-23 07:07:24,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 07:07:24,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:24,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 07:07:24,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 07:07:24,420 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 21 states. [2020-12-23 07:07:24,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:24,514 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2020-12-23 07:07:24,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 07:07:24,515 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 51 [2020-12-23 07:07:24,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:24,515 INFO L225 Difference]: With dead ends: 70 [2020-12-23 07:07:24,515 INFO L226 Difference]: Without dead ends: 54 [2020-12-23 07:07:24,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 07:07:24,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-23 07:07:24,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-12-23 07:07:24,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-23 07:07:24,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2020-12-23 07:07:24,521 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 51 [2020-12-23 07:07:24,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:24,522 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2020-12-23 07:07:24,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 07:07:24,522 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2020-12-23 07:07:24,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-23 07:07:24,522 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:24,522 INFO L422 BasicCegarLoop]: trace histogram [20, 18, 6, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:24,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-23 07:07:24,736 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:24,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:24,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1371803662, now seen corresponding path program 17 times [2020-12-23 07:07:24,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:24,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011230884] [2020-12-23 07:07:24,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:24,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:25,052 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 57 proven. 342 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-23 07:07:25,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011230884] [2020-12-23 07:07:25,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857783714] [2020-12-23 07:07:25,053 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 07:07:25,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2020-12-23 07:07:25,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:25,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 07:07:25,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:25,208 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 57 proven. 342 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-23 07:07:25,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:25,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-23 07:07:25,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214048325] [2020-12-23 07:07:25,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 07:07:25,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:25,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 07:07:25,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 07:07:25,212 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand 22 states. [2020-12-23 07:07:25,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:25,285 INFO L93 Difference]: Finished difference Result 72 states and 79 transitions. [2020-12-23 07:07:25,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 07:07:25,286 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 53 [2020-12-23 07:07:25,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:25,287 INFO L225 Difference]: With dead ends: 72 [2020-12-23 07:07:25,287 INFO L226 Difference]: Without dead ends: 56 [2020-12-23 07:07:25,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 07:07:25,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-23 07:07:25,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-12-23 07:07:25,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-23 07:07:25,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2020-12-23 07:07:25,293 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 53 [2020-12-23 07:07:25,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:25,293 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2020-12-23 07:07:25,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 07:07:25,293 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2020-12-23 07:07:25,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-23 07:07:25,294 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:25,294 INFO L422 BasicCegarLoop]: trace histogram [21, 19, 6, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:25,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 07:07:25,505 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:25,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:25,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1530741109, now seen corresponding path program 18 times [2020-12-23 07:07:25,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:25,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670770038] [2020-12-23 07:07:25,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:25,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:25,844 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 60 proven. 380 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-23 07:07:25,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670770038] [2020-12-23 07:07:25,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911854131] [2020-12-23 07:07:25,845 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 07:07:25,917 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 07:07:25,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:25,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 07:07:25,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:26,124 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 61 proven. 21 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2020-12-23 07:07:26,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:26,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 9] total 29 [2020-12-23 07:07:26,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651604446] [2020-12-23 07:07:26,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 07:07:26,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:26,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 07:07:26,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=546, Unknown=0, NotChecked=0, Total=812 [2020-12-23 07:07:26,127 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand 29 states. [2020-12-23 07:07:26,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:26,832 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2020-12-23 07:07:26,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 07:07:26,833 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 55 [2020-12-23 07:07:26,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:26,834 INFO L225 Difference]: With dead ends: 81 [2020-12-23 07:07:26,834 INFO L226 Difference]: Without dead ends: 65 [2020-12-23 07:07:26,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=766, Invalid=1586, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 07:07:26,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-23 07:07:26,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 59. [2020-12-23 07:07:26,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-23 07:07:26,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2020-12-23 07:07:26,845 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 55 [2020-12-23 07:07:26,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:26,846 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2020-12-23 07:07:26,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 07:07:26,846 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2020-12-23 07:07:26,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-23 07:07:26,847 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:26,847 INFO L422 BasicCegarLoop]: trace histogram [22, 20, 7, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:27,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 07:07:27,062 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:27,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:27,062 INFO L82 PathProgramCache]: Analyzing trace with hash 658628772, now seen corresponding path program 19 times [2020-12-23 07:07:27,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:27,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829705643] [2020-12-23 07:07:27,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:27,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:27,403 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 63 proven. 420 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-12-23 07:07:27,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829705643] [2020-12-23 07:07:27,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122679933] [2020-12-23 07:07:27,404 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 07:07:27,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:27,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 07:07:27,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:27,545 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 63 proven. 420 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-12-23 07:07:27,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:27,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-23 07:07:27,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697359590] [2020-12-23 07:07:27,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 07:07:27,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:27,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 07:07:27,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-23 07:07:27,548 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 24 states. [2020-12-23 07:07:27,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:27,647 INFO L93 Difference]: Finished difference Result 78 states and 85 transitions. [2020-12-23 07:07:27,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 07:07:27,647 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 58 [2020-12-23 07:07:27,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:27,648 INFO L225 Difference]: With dead ends: 78 [2020-12-23 07:07:27,648 INFO L226 Difference]: Without dead ends: 61 [2020-12-23 07:07:27,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 58 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 07:07:27,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-23 07:07:27,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-12-23 07:07:27,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-23 07:07:27,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2020-12-23 07:07:27,653 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 58 [2020-12-23 07:07:27,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:27,653 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2020-12-23 07:07:27,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 07:07:27,653 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2020-12-23 07:07:27,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-23 07:07:27,654 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:27,654 INFO L422 BasicCegarLoop]: trace histogram [23, 21, 7, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:27,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 07:07:27,869 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:27,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:27,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1014122425, now seen corresponding path program 20 times [2020-12-23 07:07:27,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:27,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691572896] [2020-12-23 07:07:27,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:27,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:28,232 INFO L134 CoverageAnalysis]: Checked inductivity of 557 backedges. 66 proven. 462 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-12-23 07:07:28,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691572896] [2020-12-23 07:07:28,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681793332] [2020-12-23 07:07:28,233 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 07:07:28,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:07:28,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:28,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 07:07:28,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:28,391 INFO L134 CoverageAnalysis]: Checked inductivity of 557 backedges. 66 proven. 462 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-12-23 07:07:28,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:28,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-23 07:07:28,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109884609] [2020-12-23 07:07:28,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 07:07:28,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:28,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 07:07:28,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-23 07:07:28,395 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand 25 states. [2020-12-23 07:07:28,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:28,502 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2020-12-23 07:07:28,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 07:07:28,503 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 60 [2020-12-23 07:07:28,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:28,504 INFO L225 Difference]: With dead ends: 80 [2020-12-23 07:07:28,504 INFO L226 Difference]: Without dead ends: 63 [2020-12-23 07:07:28,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-23 07:07:28,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-23 07:07:28,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-12-23 07:07:28,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-23 07:07:28,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2020-12-23 07:07:28,510 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 60 [2020-12-23 07:07:28,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:28,510 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2020-12-23 07:07:28,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 07:07:28,511 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2020-12-23 07:07:28,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-23 07:07:28,511 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:28,511 INFO L422 BasicCegarLoop]: trace histogram [24, 22, 7, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:28,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-23 07:07:28,725 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:28,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:28,726 INFO L82 PathProgramCache]: Analyzing trace with hash 2084713258, now seen corresponding path program 21 times [2020-12-23 07:07:28,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:28,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943545530] [2020-12-23 07:07:28,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:28,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:29,159 INFO L134 CoverageAnalysis]: Checked inductivity of 604 backedges. 69 proven. 506 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-12-23 07:07:29,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943545530] [2020-12-23 07:07:29,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212324910] [2020-12-23 07:07:29,159 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 07:07:29,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-23 07:07:29,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:29,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 07:07:29,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:29,480 INFO L134 CoverageAnalysis]: Checked inductivity of 604 backedges. 70 proven. 28 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2020-12-23 07:07:29,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:29,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 10] total 33 [2020-12-23 07:07:29,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45694130] [2020-12-23 07:07:29,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 07:07:29,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:29,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 07:07:29,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=712, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 07:07:29,482 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand 33 states. [2020-12-23 07:07:30,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:30,328 INFO L93 Difference]: Finished difference Result 89 states and 100 transitions. [2020-12-23 07:07:30,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-23 07:07:30,328 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 62 [2020-12-23 07:07:30,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:30,329 INFO L225 Difference]: With dead ends: 89 [2020-12-23 07:07:30,329 INFO L226 Difference]: Without dead ends: 72 [2020-12-23 07:07:30,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1011, Invalid=2069, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 07:07:30,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-23 07:07:30,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2020-12-23 07:07:30,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-23 07:07:30,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2020-12-23 07:07:30,335 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 62 [2020-12-23 07:07:30,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:30,336 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2020-12-23 07:07:30,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 07:07:30,336 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2020-12-23 07:07:30,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-23 07:07:30,337 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:30,337 INFO L422 BasicCegarLoop]: trace histogram [25, 23, 8, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:30,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:30,550 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:30,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:30,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1590038975, now seen corresponding path program 22 times [2020-12-23 07:07:30,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:30,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600095541] [2020-12-23 07:07:30,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:30,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:30,957 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 72 proven. 552 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-23 07:07:30,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600095541] [2020-12-23 07:07:30,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137029479] [2020-12-23 07:07:30,957 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 07:07:31,026 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:07:31,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:31,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 07:07:31,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:31,120 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 72 proven. 552 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-23 07:07:31,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:31,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-23 07:07:31,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593207099] [2020-12-23 07:07:31,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 07:07:31,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:31,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 07:07:31,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-23 07:07:31,122 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand 27 states. [2020-12-23 07:07:31,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:31,278 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2020-12-23 07:07:31,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 07:07:31,279 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 65 [2020-12-23 07:07:31,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:31,280 INFO L225 Difference]: With dead ends: 86 [2020-12-23 07:07:31,280 INFO L226 Difference]: Without dead ends: 68 [2020-12-23 07:07:31,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 65 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 07:07:31,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-23 07:07:31,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-12-23 07:07:31,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-23 07:07:31,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2020-12-23 07:07:31,287 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 65 [2020-12-23 07:07:31,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:31,288 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2020-12-23 07:07:31,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 07:07:31,288 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2020-12-23 07:07:31,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-23 07:07:31,289 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:31,289 INFO L422 BasicCegarLoop]: trace histogram [26, 24, 8, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:31,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 07:07:31,505 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:31,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:31,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1456870212, now seen corresponding path program 23 times [2020-12-23 07:07:31,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:31,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530459703] [2020-12-23 07:07:31,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:31,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:31,953 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 75 proven. 600 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-23 07:07:31,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530459703] [2020-12-23 07:07:31,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159720333] [2020-12-23 07:07:31,954 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 07:07:32,047 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 27 check-sat command(s) [2020-12-23 07:07:32,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:32,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 07:07:32,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:32,156 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 75 proven. 600 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-23 07:07:32,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:32,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-23 07:07:32,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550503161] [2020-12-23 07:07:32,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 07:07:32,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:32,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 07:07:32,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-23 07:07:32,159 INFO L87 Difference]: Start difference. First operand 68 states and 71 transitions. Second operand 28 states. [2020-12-23 07:07:32,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:32,300 INFO L93 Difference]: Finished difference Result 88 states and 95 transitions. [2020-12-23 07:07:32,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 07:07:32,301 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 67 [2020-12-23 07:07:32,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:32,302 INFO L225 Difference]: With dead ends: 88 [2020-12-23 07:07:32,302 INFO L226 Difference]: Without dead ends: 70 [2020-12-23 07:07:32,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-23 07:07:32,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-23 07:07:32,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-12-23 07:07:32,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-23 07:07:32,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2020-12-23 07:07:32,307 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 67 [2020-12-23 07:07:32,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:32,307 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2020-12-23 07:07:32,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 07:07:32,308 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2020-12-23 07:07:32,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-23 07:07:32,308 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:32,308 INFO L422 BasicCegarLoop]: trace histogram [27, 25, 8, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:32,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:32,524 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:32,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:32,525 INFO L82 PathProgramCache]: Analyzing trace with hash -368903047, now seen corresponding path program 24 times [2020-12-23 07:07:32,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:32,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684490776] [2020-12-23 07:07:32,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:32,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:32,987 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 78 proven. 650 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-23 07:07:32,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684490776] [2020-12-23 07:07:32,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137760698] [2020-12-23 07:07:32,987 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 07:07:33,069 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-23 07:07:33,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:33,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 07:07:33,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:33,389 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 79 proven. 36 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2020-12-23 07:07:33,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:33,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 11] total 37 [2020-12-23 07:07:33,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592077122] [2020-12-23 07:07:33,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 07:07:33,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:33,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 07:07:33,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=432, Invalid=900, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 07:07:33,391 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand 37 states. [2020-12-23 07:07:34,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:34,280 INFO L93 Difference]: Finished difference Result 97 states and 108 transitions. [2020-12-23 07:07:34,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 07:07:34,280 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 69 [2020-12-23 07:07:34,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:34,281 INFO L225 Difference]: With dead ends: 97 [2020-12-23 07:07:34,281 INFO L226 Difference]: Without dead ends: 79 [2020-12-23 07:07:34,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1290, Invalid=2616, Unknown=0, NotChecked=0, Total=3906 [2020-12-23 07:07:34,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-12-23 07:07:34,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 73. [2020-12-23 07:07:34,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-23 07:07:34,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2020-12-23 07:07:34,294 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 69 [2020-12-23 07:07:34,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:34,294 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2020-12-23 07:07:34,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 07:07:34,294 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2020-12-23 07:07:34,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-23 07:07:34,295 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:34,295 INFO L422 BasicCegarLoop]: trace histogram [28, 26, 9, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:34,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 07:07:34,509 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:34,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:34,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1037797578, now seen corresponding path program 25 times [2020-12-23 07:07:34,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:34,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90113755] [2020-12-23 07:07:34,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:34,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:35,061 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 81 proven. 702 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-23 07:07:35,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90113755] [2020-12-23 07:07:35,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121013431] [2020-12-23 07:07:35,062 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 07:07:35,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:35,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 07:07:35,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:35,229 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 81 proven. 702 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-23 07:07:35,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:35,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-23 07:07:35,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625342013] [2020-12-23 07:07:35,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 07:07:35,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:35,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 07:07:35,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-23 07:07:35,231 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand 30 states. [2020-12-23 07:07:35,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:35,392 INFO L93 Difference]: Finished difference Result 94 states and 101 transitions. [2020-12-23 07:07:35,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 07:07:35,393 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 72 [2020-12-23 07:07:35,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:35,394 INFO L225 Difference]: With dead ends: 94 [2020-12-23 07:07:35,394 INFO L226 Difference]: Without dead ends: 75 [2020-12-23 07:07:35,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-23 07:07:35,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-23 07:07:35,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-12-23 07:07:35,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-23 07:07:35,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2020-12-23 07:07:35,405 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 72 [2020-12-23 07:07:35,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:35,405 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2020-12-23 07:07:35,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 07:07:35,405 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2020-12-23 07:07:35,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-23 07:07:35,406 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:35,406 INFO L422 BasicCegarLoop]: trace histogram [29, 27, 9, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:35,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:35,620 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:35,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:35,621 INFO L82 PathProgramCache]: Analyzing trace with hash -64965223, now seen corresponding path program 26 times [2020-12-23 07:07:35,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:35,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890211357] [2020-12-23 07:07:35,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:35,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:36,191 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 84 proven. 756 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-23 07:07:36,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890211357] [2020-12-23 07:07:36,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413283516] [2020-12-23 07:07:36,193 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 07:07:36,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:07:36,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:36,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 07:07:36,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:36,379 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 84 proven. 756 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-23 07:07:36,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:36,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-12-23 07:07:36,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694134804] [2020-12-23 07:07:36,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 07:07:36,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:36,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 07:07:36,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-23 07:07:36,382 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand 31 states. [2020-12-23 07:07:36,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:36,518 INFO L93 Difference]: Finished difference Result 96 states and 103 transitions. [2020-12-23 07:07:36,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 07:07:36,519 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 74 [2020-12-23 07:07:36,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:36,520 INFO L225 Difference]: With dead ends: 96 [2020-12-23 07:07:36,520 INFO L226 Difference]: Without dead ends: 77 [2020-12-23 07:07:36,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-23 07:07:36,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-23 07:07:36,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-12-23 07:07:36,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-12-23 07:07:36,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2020-12-23 07:07:36,528 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 74 [2020-12-23 07:07:36,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:36,528 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2020-12-23 07:07:36,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 07:07:36,529 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2020-12-23 07:07:36,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-23 07:07:36,529 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:36,529 INFO L422 BasicCegarLoop]: trace histogram [30, 28, 9, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:36,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-23 07:07:36,744 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:36,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:36,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1475942596, now seen corresponding path program 27 times [2020-12-23 07:07:36,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:36,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470593898] [2020-12-23 07:07:36,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:36,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:37,293 INFO L134 CoverageAnalysis]: Checked inductivity of 945 backedges. 87 proven. 812 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-23 07:07:37,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470593898] [2020-12-23 07:07:37,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027927502] [2020-12-23 07:07:37,293 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 07:07:37,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-23 07:07:37,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:37,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 07:07:37,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:37,731 INFO L134 CoverageAnalysis]: Checked inductivity of 945 backedges. 88 proven. 45 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2020-12-23 07:07:37,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:37,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 12] total 41 [2020-12-23 07:07:37,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446544388] [2020-12-23 07:07:37,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-23 07:07:37,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:37,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-23 07:07:37,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=1110, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 07:07:37,733 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand 41 states. [2020-12-23 07:07:38,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:38,834 INFO L93 Difference]: Finished difference Result 105 states and 116 transitions. [2020-12-23 07:07:38,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-23 07:07:38,836 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 76 [2020-12-23 07:07:38,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:38,837 INFO L225 Difference]: With dead ends: 105 [2020-12-23 07:07:38,837 INFO L226 Difference]: Without dead ends: 86 [2020-12-23 07:07:38,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1603, Invalid=3227, Unknown=0, NotChecked=0, Total=4830 [2020-12-23 07:07:38,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-23 07:07:38,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 80. [2020-12-23 07:07:38,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-23 07:07:38,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions. [2020-12-23 07:07:38,846 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 76 [2020-12-23 07:07:38,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:38,846 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 83 transitions. [2020-12-23 07:07:38,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-23 07:07:38,846 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions. [2020-12-23 07:07:38,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-23 07:07:38,847 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:38,847 INFO L422 BasicCegarLoop]: trace histogram [31, 29, 10, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:39,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:39,062 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:39,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:39,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1910092077, now seen corresponding path program 28 times [2020-12-23 07:07:39,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:39,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141002188] [2020-12-23 07:07:39,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:39,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:39,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1016 backedges. 90 proven. 870 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-12-23 07:07:39,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141002188] [2020-12-23 07:07:39,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905015904] [2020-12-23 07:07:39,663 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 07:07:39,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:07:39,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:39,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 07:07:39,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:39,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1016 backedges. 90 proven. 870 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-12-23 07:07:39,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:39,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-12-23 07:07:39,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825172041] [2020-12-23 07:07:39,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 07:07:39,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:39,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 07:07:39,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 07:07:39,830 INFO L87 Difference]: Start difference. First operand 80 states and 83 transitions. Second operand 33 states. [2020-12-23 07:07:39,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:39,927 INFO L93 Difference]: Finished difference Result 102 states and 109 transitions. [2020-12-23 07:07:39,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 07:07:39,928 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 79 [2020-12-23 07:07:39,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:39,929 INFO L225 Difference]: With dead ends: 102 [2020-12-23 07:07:39,929 INFO L226 Difference]: Without dead ends: 82 [2020-12-23 07:07:39,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 79 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 07:07:39,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-23 07:07:39,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-12-23 07:07:39,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-23 07:07:39,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2020-12-23 07:07:39,936 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 79 [2020-12-23 07:07:39,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:39,936 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2020-12-23 07:07:39,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 07:07:39,936 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2020-12-23 07:07:39,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-23 07:07:39,937 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:39,937 INFO L422 BasicCegarLoop]: trace histogram [32, 30, 10, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:40,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-23 07:07:40,152 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:40,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:40,153 INFO L82 PathProgramCache]: Analyzing trace with hash -112194198, now seen corresponding path program 29 times [2020-12-23 07:07:40,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:40,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273182230] [2020-12-23 07:07:40,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:40,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:40,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1079 backedges. 93 proven. 930 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-12-23 07:07:40,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273182230] [2020-12-23 07:07:40,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301562708] [2020-12-23 07:07:40,771 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 07:07:40,851 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 33 check-sat command(s) [2020-12-23 07:07:40,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:40,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 07:07:40,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:40,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1079 backedges. 93 proven. 930 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-12-23 07:07:40,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:40,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-12-23 07:07:40,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948036565] [2020-12-23 07:07:40,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 07:07:40,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:40,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 07:07:40,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 07:07:40,980 INFO L87 Difference]: Start difference. First operand 82 states and 85 transitions. Second operand 34 states. [2020-12-23 07:07:41,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:41,094 INFO L93 Difference]: Finished difference Result 104 states and 111 transitions. [2020-12-23 07:07:41,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-23 07:07:41,095 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 81 [2020-12-23 07:07:41,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:41,096 INFO L225 Difference]: With dead ends: 104 [2020-12-23 07:07:41,096 INFO L226 Difference]: Without dead ends: 84 [2020-12-23 07:07:41,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 07:07:41,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-23 07:07:41,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-12-23 07:07:41,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-12-23 07:07:41,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2020-12-23 07:07:41,104 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 81 [2020-12-23 07:07:41,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:41,105 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2020-12-23 07:07:41,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 07:07:41,106 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2020-12-23 07:07:41,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-23 07:07:41,106 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:41,106 INFO L422 BasicCegarLoop]: trace histogram [33, 31, 10, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:41,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:41,320 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:41,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:41,321 INFO L82 PathProgramCache]: Analyzing trace with hash 2090880615, now seen corresponding path program 30 times [2020-12-23 07:07:41,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:41,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899989695] [2020-12-23 07:07:41,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:41,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:41,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1144 backedges. 96 proven. 992 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-12-23 07:07:41,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899989695] [2020-12-23 07:07:41,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440132666] [2020-12-23 07:07:41,961 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 07:07:42,018 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-12-23 07:07:42,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:42,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 07:07:42,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:42,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1144 backedges. 97 proven. 55 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2020-12-23 07:07:42,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:42,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 13] total 45 [2020-12-23 07:07:42,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898077405] [2020-12-23 07:07:42,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-23 07:07:42,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:42,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-23 07:07:42,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=638, Invalid=1342, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 07:07:42,462 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand 45 states. [2020-12-23 07:07:43,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:43,751 INFO L93 Difference]: Finished difference Result 113 states and 124 transitions. [2020-12-23 07:07:43,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-23 07:07:43,751 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 83 [2020-12-23 07:07:43,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:43,752 INFO L225 Difference]: With dead ends: 113 [2020-12-23 07:07:43,752 INFO L226 Difference]: Without dead ends: 93 [2020-12-23 07:07:43,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 953 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1950, Invalid=3902, Unknown=0, NotChecked=0, Total=5852 [2020-12-23 07:07:43,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-23 07:07:43,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 87. [2020-12-23 07:07:43,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-23 07:07:43,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions. [2020-12-23 07:07:43,761 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 83 [2020-12-23 07:07:43,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:43,762 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 90 transitions. [2020-12-23 07:07:43,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-23 07:07:43,762 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions. [2020-12-23 07:07:43,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-23 07:07:43,762 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:43,762 INFO L422 BasicCegarLoop]: trace histogram [34, 32, 11, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:43,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-23 07:07:43,968 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:43,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:43,968 INFO L82 PathProgramCache]: Analyzing trace with hash 800958920, now seen corresponding path program 31 times [2020-12-23 07:07:43,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:43,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908378260] [2020-12-23 07:07:43,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:43,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:44,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1222 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2020-12-23 07:07:44,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908378260] [2020-12-23 07:07:44,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742689540] [2020-12-23 07:07:44,755 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 07:07:44,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:44,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 07:07:44,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:44,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1222 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2020-12-23 07:07:44,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:44,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-12-23 07:07:44,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812065973] [2020-12-23 07:07:44,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-23 07:07:44,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:44,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-23 07:07:44,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 07:07:44,941 INFO L87 Difference]: Start difference. First operand 87 states and 90 transitions. Second operand 36 states. [2020-12-23 07:07:45,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:45,112 INFO L93 Difference]: Finished difference Result 110 states and 117 transitions. [2020-12-23 07:07:45,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-23 07:07:45,113 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 86 [2020-12-23 07:07:45,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:45,114 INFO L225 Difference]: With dead ends: 110 [2020-12-23 07:07:45,114 INFO L226 Difference]: Without dead ends: 89 [2020-12-23 07:07:45,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 07:07:45,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-23 07:07:45,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-12-23 07:07:45,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-23 07:07:45,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2020-12-23 07:07:45,120 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 86 [2020-12-23 07:07:45,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:45,120 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2020-12-23 07:07:45,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-23 07:07:45,121 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2020-12-23 07:07:45,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-23 07:07:45,121 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:45,121 INFO L422 BasicCegarLoop]: trace histogram [35, 33, 11, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:45,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-23 07:07:45,336 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:45,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:45,337 INFO L82 PathProgramCache]: Analyzing trace with hash 609189611, now seen corresponding path program 32 times [2020-12-23 07:07:45,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:45,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330956912] [2020-12-23 07:07:45,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:45,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:46,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 102 proven. 1122 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2020-12-23 07:07:46,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330956912] [2020-12-23 07:07:46,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315819131] [2020-12-23 07:07:46,085 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 07:07:46,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:07:46,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:46,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 07:07:46,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:46,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 102 proven. 1122 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2020-12-23 07:07:46,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:46,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-12-23 07:07:46,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045454720] [2020-12-23 07:07:46,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 07:07:46,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:46,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 07:07:46,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 07:07:46,295 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand 37 states. [2020-12-23 07:07:46,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:46,452 INFO L93 Difference]: Finished difference Result 112 states and 119 transitions. [2020-12-23 07:07:46,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 07:07:46,452 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 88 [2020-12-23 07:07:46,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:46,453 INFO L225 Difference]: With dead ends: 112 [2020-12-23 07:07:46,453 INFO L226 Difference]: Without dead ends: 91 [2020-12-23 07:07:46,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 07:07:46,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-23 07:07:46,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-12-23 07:07:46,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-23 07:07:46,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 94 transitions. [2020-12-23 07:07:46,462 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 94 transitions. Word has length 88 [2020-12-23 07:07:46,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:46,462 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 94 transitions. [2020-12-23 07:07:46,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 07:07:46,462 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 94 transitions. [2020-12-23 07:07:46,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-23 07:07:46,463 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:46,463 INFO L422 BasicCegarLoop]: trace histogram [36, 34, 11, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:46,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-23 07:07:46,678 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:46,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:46,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1002477390, now seen corresponding path program 33 times [2020-12-23 07:07:46,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:46,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71158608] [2020-12-23 07:07:46,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:46,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:47,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1362 backedges. 105 proven. 1190 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2020-12-23 07:07:47,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71158608] [2020-12-23 07:07:47,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431692675] [2020-12-23 07:07:47,494 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 07:07:47,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-23 07:07:47,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:47,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 07:07:47,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:47,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1362 backedges. 170 proven. 4 refuted. 0 times theorem prover too weak. 1188 trivial. 0 not checked. [2020-12-23 07:07:47,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:47,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 5] total 40 [2020-12-23 07:07:47,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733712176] [2020-12-23 07:07:47,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 07:07:47,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:47,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 07:07:47,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 07:07:47,769 INFO L87 Difference]: Start difference. First operand 91 states and 94 transitions. Second operand 40 states. [2020-12-23 07:07:48,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:48,007 INFO L93 Difference]: Finished difference Result 117 states and 127 transitions. [2020-12-23 07:07:48,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 07:07:48,007 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 90 [2020-12-23 07:07:48,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:48,008 INFO L225 Difference]: With dead ends: 117 [2020-12-23 07:07:48,009 INFO L226 Difference]: Without dead ends: 96 [2020-12-23 07:07:48,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 07:07:48,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-23 07:07:48,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-12-23 07:07:48,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-12-23 07:07:48,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2020-12-23 07:07:48,018 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 90 [2020-12-23 07:07:48,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:48,018 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2020-12-23 07:07:48,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 07:07:48,018 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2020-12-23 07:07:48,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-23 07:07:48,019 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:48,019 INFO L422 BasicCegarLoop]: trace histogram [38, 35, 11, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:48,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-23 07:07:48,234 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:48,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:48,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1558758186, now seen corresponding path program 34 times [2020-12-23 07:07:48,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:48,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389732492] [2020-12-23 07:07:48,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:48,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:49,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 180 proven. 1260 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-23 07:07:49,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389732492] [2020-12-23 07:07:49,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789329797] [2020-12-23 07:07:49,060 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 07:07:49,130 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:07:49,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:49,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-23 07:07:49,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:49,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 180 proven. 1260 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-23 07:07:49,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:49,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-12-23 07:07:49,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33599703] [2020-12-23 07:07:49,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-23 07:07:49,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:49,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-23 07:07:49,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 07:07:49,250 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand 39 states. [2020-12-23 07:07:49,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:49,450 INFO L93 Difference]: Finished difference Result 120 states and 129 transitions. [2020-12-23 07:07:49,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-23 07:07:49,451 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 94 [2020-12-23 07:07:49,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:49,452 INFO L225 Difference]: With dead ends: 120 [2020-12-23 07:07:49,452 INFO L226 Difference]: Without dead ends: 97 [2020-12-23 07:07:49,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 94 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 07:07:49,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-12-23 07:07:49,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-12-23 07:07:49,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-23 07:07:49,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2020-12-23 07:07:49,460 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 94 [2020-12-23 07:07:49,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:49,460 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2020-12-23 07:07:49,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-23 07:07:49,460 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2020-12-23 07:07:49,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-23 07:07:49,461 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:49,461 INFO L422 BasicCegarLoop]: trace histogram [39, 36, 11, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:49,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-23 07:07:49,675 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:49,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:49,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1403044103, now seen corresponding path program 35 times [2020-12-23 07:07:49,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:49,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634969286] [2020-12-23 07:07:49,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:49,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:50,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1587 backedges. 185 proven. 1332 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-23 07:07:50,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634969286] [2020-12-23 07:07:50,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284252893] [2020-12-23 07:07:50,599 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 07:07:50,692 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2020-12-23 07:07:50,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:50,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-23 07:07:50,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:50,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1587 backedges. 185 proven. 1332 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-23 07:07:50,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:50,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-23 07:07:50,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322311404] [2020-12-23 07:07:50,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 07:07:50,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:50,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 07:07:50,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 07:07:50,823 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand 40 states. [2020-12-23 07:07:51,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:51,014 INFO L93 Difference]: Finished difference Result 122 states and 131 transitions. [2020-12-23 07:07:51,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-23 07:07:51,015 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 96 [2020-12-23 07:07:51,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:51,016 INFO L225 Difference]: With dead ends: 122 [2020-12-23 07:07:51,016 INFO L226 Difference]: Without dead ends: 99 [2020-12-23 07:07:51,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 07:07:51,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-12-23 07:07:51,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-12-23 07:07:51,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-23 07:07:51,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 103 transitions. [2020-12-23 07:07:51,026 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 103 transitions. Word has length 96 [2020-12-23 07:07:51,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:51,026 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 103 transitions. [2020-12-23 07:07:51,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 07:07:51,026 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 103 transitions. [2020-12-23 07:07:51,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-23 07:07:51,027 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:51,027 INFO L422 BasicCegarLoop]: trace histogram [40, 37, 11, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:51,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-23 07:07:51,241 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:51,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:51,241 INFO L82 PathProgramCache]: Analyzing trace with hash -2085665700, now seen corresponding path program 36 times [2020-12-23 07:07:51,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:51,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725916386] [2020-12-23 07:07:51,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:51,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:52,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1666 backedges. 190 proven. 1406 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-23 07:07:52,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725916386] [2020-12-23 07:07:52,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845064548] [2020-12-23 07:07:52,150 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 07:07:52,219 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-23 07:07:52,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:52,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 07:07:52,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:52,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1666 backedges. 194 proven. 66 refuted. 0 times theorem prover too weak. 1406 trivial. 0 not checked. [2020-12-23 07:07:52,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:52,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 14] total 52 [2020-12-23 07:07:52,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479776356] [2020-12-23 07:07:52,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-23 07:07:52,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:52,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-23 07:07:52,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=870, Invalid=1782, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 07:07:52,756 INFO L87 Difference]: Start difference. First operand 99 states and 103 transitions. Second operand 52 states. [2020-12-23 07:07:54,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:54,565 INFO L93 Difference]: Finished difference Result 137 states and 153 transitions. [2020-12-23 07:07:54,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-23 07:07:54,566 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 98 [2020-12-23 07:07:54,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:54,567 INFO L225 Difference]: With dead ends: 137 [2020-12-23 07:07:54,567 INFO L226 Difference]: Without dead ends: 114 [2020-12-23 07:07:54,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1371 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2618, Invalid=5392, Unknown=0, NotChecked=0, Total=8010 [2020-12-23 07:07:54,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-12-23 07:07:54,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 102. [2020-12-23 07:07:54,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-12-23 07:07:54,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2020-12-23 07:07:54,577 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 98 [2020-12-23 07:07:54,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:54,578 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2020-12-23 07:07:54,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-23 07:07:54,578 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2020-12-23 07:07:54,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-23 07:07:54,579 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:54,579 INFO L422 BasicCegarLoop]: trace histogram [41, 38, 12, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:54,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-12-23 07:07:54,794 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:54,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:54,795 INFO L82 PathProgramCache]: Analyzing trace with hash 460688461, now seen corresponding path program 37 times [2020-12-23 07:07:54,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:54,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755529567] [2020-12-23 07:07:54,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:54,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:55,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1759 backedges. 195 proven. 1482 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-12-23 07:07:55,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755529567] [2020-12-23 07:07:55,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826799497] [2020-12-23 07:07:55,835 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 07:07:55,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:55,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-23 07:07:55,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:56,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1759 backedges. 195 proven. 1482 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-12-23 07:07:56,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:56,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-12-23 07:07:56,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785727389] [2020-12-23 07:07:56,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-23 07:07:56,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:56,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-23 07:07:56,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 07:07:56,035 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand 42 states. [2020-12-23 07:07:56,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:56,269 INFO L93 Difference]: Finished difference Result 128 states and 137 transitions. [2020-12-23 07:07:56,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-23 07:07:56,270 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 101 [2020-12-23 07:07:56,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:56,272 INFO L225 Difference]: With dead ends: 128 [2020-12-23 07:07:56,272 INFO L226 Difference]: Without dead ends: 104 [2020-12-23 07:07:56,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 07:07:56,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-23 07:07:56,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2020-12-23 07:07:56,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-12-23 07:07:56,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2020-12-23 07:07:56,280 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 101 [2020-12-23 07:07:56,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:56,281 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2020-12-23 07:07:56,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-23 07:07:56,281 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2020-12-23 07:07:56,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-12-23 07:07:56,281 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:56,282 INFO L422 BasicCegarLoop]: trace histogram [42, 39, 12, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:56,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:56,487 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:56,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:56,488 INFO L82 PathProgramCache]: Analyzing trace with hash -2024772406, now seen corresponding path program 38 times [2020-12-23 07:07:56,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:56,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754107076] [2020-12-23 07:07:56,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:56,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:57,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1842 backedges. 200 proven. 1560 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-12-23 07:07:57,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754107076] [2020-12-23 07:07:57,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842910352] [2020-12-23 07:07:57,542 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 07:07:57,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:07:57,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:57,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-23 07:07:57,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:57,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1842 backedges. 200 proven. 1560 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-12-23 07:07:57,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:57,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-12-23 07:07:57,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185484728] [2020-12-23 07:07:57,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-23 07:07:57,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:57,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-23 07:07:57,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 07:07:57,757 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand 43 states. [2020-12-23 07:07:57,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:57,945 INFO L93 Difference]: Finished difference Result 130 states and 139 transitions. [2020-12-23 07:07:57,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-23 07:07:57,946 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 103 [2020-12-23 07:07:57,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:57,947 INFO L225 Difference]: With dead ends: 130 [2020-12-23 07:07:57,947 INFO L226 Difference]: Without dead ends: 106 [2020-12-23 07:07:57,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 07:07:57,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-23 07:07:57,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2020-12-23 07:07:57,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-12-23 07:07:57,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 110 transitions. [2020-12-23 07:07:57,956 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 110 transitions. Word has length 103 [2020-12-23 07:07:57,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:57,956 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 110 transitions. [2020-12-23 07:07:57,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-23 07:07:57,956 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 110 transitions. [2020-12-23 07:07:57,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-23 07:07:57,957 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:57,957 INFO L422 BasicCegarLoop]: trace histogram [43, 40, 12, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:58,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:58,173 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:58,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:58,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1744118279, now seen corresponding path program 39 times [2020-12-23 07:07:58,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:58,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141177295] [2020-12-23 07:07:58,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:58,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:59,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1927 backedges. 205 proven. 1640 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-12-23 07:07:59,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141177295] [2020-12-23 07:07:59,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909827682] [2020-12-23 07:07:59,260 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 07:07:59,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-23 07:07:59,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:59,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 07:07:59,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:59,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1927 backedges. 209 proven. 78 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2020-12-23 07:07:59,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:59,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 15] total 56 [2020-12-23 07:07:59,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629448033] [2020-12-23 07:07:59,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-23 07:07:59,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:59,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-23 07:07:59,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1007, Invalid=2073, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 07:07:59,944 INFO L87 Difference]: Start difference. First operand 106 states and 110 transitions. Second operand 56 states. [2020-12-23 07:08:01,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:01,962 INFO L93 Difference]: Finished difference Result 145 states and 161 transitions. [2020-12-23 07:08:01,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-12-23 07:08:01,962 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 105 [2020-12-23 07:08:01,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:01,963 INFO L225 Difference]: With dead ends: 145 [2020-12-23 07:08:01,964 INFO L226 Difference]: Without dead ends: 121 [2020-12-23 07:08:01,965 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1588 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3057, Invalid=6255, Unknown=0, NotChecked=0, Total=9312 [2020-12-23 07:08:01,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-12-23 07:08:01,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 109. [2020-12-23 07:08:01,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-12-23 07:08:01,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 113 transitions. [2020-12-23 07:08:01,974 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 113 transitions. Word has length 105 [2020-12-23 07:08:01,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:01,974 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 113 transitions. [2020-12-23 07:08:01,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-23 07:08:01,974 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 113 transitions. [2020-12-23 07:08:01,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-23 07:08:01,975 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:01,975 INFO L422 BasicCegarLoop]: trace histogram [44, 41, 13, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:02,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:02,190 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:02,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:02,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1777898008, now seen corresponding path program 40 times [2020-12-23 07:08:02,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:02,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466417605] [2020-12-23 07:08:02,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:02,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:03,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2027 backedges. 210 proven. 1722 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-12-23 07:08:03,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466417605] [2020-12-23 07:08:03,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533609403] [2020-12-23 07:08:03,377 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 07:08:03,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:08:03,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:03,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-23 07:08:03,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:03,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2027 backedges. 210 proven. 1722 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-12-23 07:08:03,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:03,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2020-12-23 07:08:03,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142283165] [2020-12-23 07:08:03,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-23 07:08:03,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:03,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-23 07:08:03,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 07:08:03,598 INFO L87 Difference]: Start difference. First operand 109 states and 113 transitions. Second operand 45 states. [2020-12-23 07:08:03,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:03,839 INFO L93 Difference]: Finished difference Result 136 states and 145 transitions. [2020-12-23 07:08:03,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-23 07:08:03,840 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 108 [2020-12-23 07:08:03,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:03,841 INFO L225 Difference]: With dead ends: 136 [2020-12-23 07:08:03,841 INFO L226 Difference]: Without dead ends: 111 [2020-12-23 07:08:03,842 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 07:08:03,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-12-23 07:08:03,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2020-12-23 07:08:03,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-12-23 07:08:03,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2020-12-23 07:08:03,851 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 108 [2020-12-23 07:08:03,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:03,851 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2020-12-23 07:08:03,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-23 07:08:03,851 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2020-12-23 07:08:03,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-23 07:08:03,852 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:03,852 INFO L422 BasicCegarLoop]: trace histogram [45, 42, 13, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:04,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-23 07:08:04,065 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:04,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:04,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1054640437, now seen corresponding path program 41 times [2020-12-23 07:08:04,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:04,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202498200] [2020-12-23 07:08:04,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:04,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:05,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 215 proven. 1806 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-12-23 07:08:05,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202498200] [2020-12-23 07:08:05,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541170072] [2020-12-23 07:08:05,230 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 07:08:05,338 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2020-12-23 07:08:05,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:05,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-23 07:08:05,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:05,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 215 proven. 1806 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-12-23 07:08:05,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:05,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2020-12-23 07:08:05,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633968736] [2020-12-23 07:08:05,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-23 07:08:05,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:05,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-23 07:08:05,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 07:08:05,478 INFO L87 Difference]: Start difference. First operand 111 states and 115 transitions. Second operand 46 states. [2020-12-23 07:08:05,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:05,739 INFO L93 Difference]: Finished difference Result 138 states and 147 transitions. [2020-12-23 07:08:05,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-23 07:08:05,740 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 110 [2020-12-23 07:08:05,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:05,741 INFO L225 Difference]: With dead ends: 138 [2020-12-23 07:08:05,741 INFO L226 Difference]: Without dead ends: 113 [2020-12-23 07:08:05,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 07:08:05,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-12-23 07:08:05,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2020-12-23 07:08:05,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-12-23 07:08:05,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 117 transitions. [2020-12-23 07:08:05,750 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 117 transitions. Word has length 110 [2020-12-23 07:08:05,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:05,750 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 117 transitions. [2020-12-23 07:08:05,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-23 07:08:05,750 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 117 transitions. [2020-12-23 07:08:05,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-23 07:08:05,751 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:05,751 INFO L422 BasicCegarLoop]: trace histogram [46, 43, 13, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:05,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:05,964 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:05,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:05,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1788816658, now seen corresponding path program 42 times [2020-12-23 07:08:05,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:05,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587714168] [2020-12-23 07:08:05,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:05,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:07,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2207 backedges. 220 proven. 1892 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-12-23 07:08:07,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587714168] [2020-12-23 07:08:07,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413336265] [2020-12-23 07:08:07,290 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 07:08:07,367 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-12-23 07:08:07,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:07,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 07:08:07,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:08,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2207 backedges. 224 proven. 91 refuted. 0 times theorem prover too weak. 1892 trivial. 0 not checked. [2020-12-23 07:08:08,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:08,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 16] total 60 [2020-12-23 07:08:08,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14192813] [2020-12-23 07:08:08,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-12-23 07:08:08,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:08,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-12-23 07:08:08,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1154, Invalid=2386, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 07:08:08,122 INFO L87 Difference]: Start difference. First operand 113 states and 117 transitions. Second operand 60 states. [2020-12-23 07:08:10,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:10,500 INFO L93 Difference]: Finished difference Result 153 states and 169 transitions. [2020-12-23 07:08:10,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-12-23 07:08:10,500 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 112 [2020-12-23 07:08:10,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:10,502 INFO L225 Difference]: With dead ends: 153 [2020-12-23 07:08:10,502 INFO L226 Difference]: Without dead ends: 128 [2020-12-23 07:08:10,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1820 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3530, Invalid=7182, Unknown=0, NotChecked=0, Total=10712 [2020-12-23 07:08:10,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-12-23 07:08:10,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 116. [2020-12-23 07:08:10,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-12-23 07:08:10,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 120 transitions. [2020-12-23 07:08:10,514 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 120 transitions. Word has length 112 [2020-12-23 07:08:10,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:10,514 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 120 transitions. [2020-12-23 07:08:10,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-12-23 07:08:10,514 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 120 transitions. [2020-12-23 07:08:10,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-23 07:08:10,515 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:10,515 INFO L422 BasicCegarLoop]: trace histogram [47, 44, 14, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:10,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:10,730 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:10,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:10,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1487404741, now seen corresponding path program 43 times [2020-12-23 07:08:10,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:10,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816155573] [2020-12-23 07:08:10,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:10,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:12,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2314 backedges. 225 proven. 1980 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2020-12-23 07:08:12,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816155573] [2020-12-23 07:08:12,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132756344] [2020-12-23 07:08:12,076 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 07:08:12,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:12,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-23 07:08:12,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:12,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2314 backedges. 225 proven. 1980 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2020-12-23 07:08:12,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:12,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2020-12-23 07:08:12,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292743072] [2020-12-23 07:08:12,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-23 07:08:12,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:12,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-23 07:08:12,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 07:08:12,309 INFO L87 Difference]: Start difference. First operand 116 states and 120 transitions. Second operand 48 states. [2020-12-23 07:08:12,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:12,529 INFO L93 Difference]: Finished difference Result 144 states and 153 transitions. [2020-12-23 07:08:12,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-23 07:08:12,530 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 115 [2020-12-23 07:08:12,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:12,531 INFO L225 Difference]: With dead ends: 144 [2020-12-23 07:08:12,531 INFO L226 Difference]: Without dead ends: 118 [2020-12-23 07:08:12,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 07:08:12,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-12-23 07:08:12,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2020-12-23 07:08:12,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-12-23 07:08:12,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 122 transitions. [2020-12-23 07:08:12,541 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 122 transitions. Word has length 115 [2020-12-23 07:08:12,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:12,541 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 122 transitions. [2020-12-23 07:08:12,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-23 07:08:12,541 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 122 transitions. [2020-12-23 07:08:12,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-12-23 07:08:12,542 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:12,542 INFO L422 BasicCegarLoop]: trace histogram [48, 45, 14, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:12,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-12-23 07:08:12,751 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:12,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:12,752 INFO L82 PathProgramCache]: Analyzing trace with hash 718127864, now seen corresponding path program 44 times [2020-12-23 07:08:12,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:12,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724201071] [2020-12-23 07:08:12,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:12,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:14,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2409 backedges. 230 proven. 2070 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2020-12-23 07:08:14,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724201071] [2020-12-23 07:08:14,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728730530] [2020-12-23 07:08:14,120 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 07:08:14,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:08:14,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:14,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-23 07:08:14,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:14,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2409 backedges. 230 proven. 2070 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2020-12-23 07:08:14,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:14,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2020-12-23 07:08:14,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077852549] [2020-12-23 07:08:14,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-23 07:08:14,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:14,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-23 07:08:14,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 07:08:14,366 INFO L87 Difference]: Start difference. First operand 118 states and 122 transitions. Second operand 49 states. [2020-12-23 07:08:14,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:14,577 INFO L93 Difference]: Finished difference Result 146 states and 155 transitions. [2020-12-23 07:08:14,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-23 07:08:14,578 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 117 [2020-12-23 07:08:14,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:14,579 INFO L225 Difference]: With dead ends: 146 [2020-12-23 07:08:14,579 INFO L226 Difference]: Without dead ends: 120 [2020-12-23 07:08:14,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 07:08:14,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-12-23 07:08:14,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2020-12-23 07:08:14,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-12-23 07:08:14,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 124 transitions. [2020-12-23 07:08:14,589 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 124 transitions. Word has length 117 [2020-12-23 07:08:14,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:14,590 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 124 transitions. [2020-12-23 07:08:14,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-23 07:08:14,590 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 124 transitions. [2020-12-23 07:08:14,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-12-23 07:08:14,591 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:14,591 INFO L422 BasicCegarLoop]: trace histogram [49, 46, 14, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:14,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-23 07:08:14,805 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:14,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:14,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1478882955, now seen corresponding path program 45 times [2020-12-23 07:08:14,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:14,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155514072] [2020-12-23 07:08:14,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:14,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:16,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2506 backedges. 235 proven. 2162 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2020-12-23 07:08:16,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155514072] [2020-12-23 07:08:16,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305413880] [2020-12-23 07:08:16,305 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 07:08:16,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-23 07:08:16,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:16,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 07:08:16,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:17,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2506 backedges. 239 proven. 105 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2020-12-23 07:08:17,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:17,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 17] total 64 [2020-12-23 07:08:17,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328364937] [2020-12-23 07:08:17,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-12-23 07:08:17,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:17,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-12-23 07:08:17,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1311, Invalid=2721, Unknown=0, NotChecked=0, Total=4032 [2020-12-23 07:08:17,202 INFO L87 Difference]: Start difference. First operand 120 states and 124 transitions. Second operand 64 states. [2020-12-23 07:08:19,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:19,599 INFO L93 Difference]: Finished difference Result 161 states and 177 transitions. [2020-12-23 07:08:19,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-12-23 07:08:19,600 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 119 [2020-12-23 07:08:19,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:19,601 INFO L225 Difference]: With dead ends: 161 [2020-12-23 07:08:19,601 INFO L226 Difference]: Without dead ends: 135 [2020-12-23 07:08:19,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2067 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=4037, Invalid=8173, Unknown=0, NotChecked=0, Total=12210 [2020-12-23 07:08:19,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-12-23 07:08:19,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 123. [2020-12-23 07:08:19,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-12-23 07:08:19,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 127 transitions. [2020-12-23 07:08:19,612 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 127 transitions. Word has length 119 [2020-12-23 07:08:19,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:19,612 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 127 transitions. [2020-12-23 07:08:19,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-12-23 07:08:19,613 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 127 transitions. [2020-12-23 07:08:19,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-12-23 07:08:19,613 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:19,613 INFO L422 BasicCegarLoop]: trace histogram [50, 47, 15, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:19,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-23 07:08:19,816 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:19,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:19,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1258248954, now seen corresponding path program 46 times [2020-12-23 07:08:19,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:19,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434133067] [2020-12-23 07:08:19,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:19,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:21,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2620 backedges. 240 proven. 2256 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2020-12-23 07:08:21,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434133067] [2020-12-23 07:08:21,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970338853] [2020-12-23 07:08:21,327 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 07:08:21,411 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:08:21,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:21,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-23 07:08:21,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:21,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2620 backedges. 240 proven. 2256 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2020-12-23 07:08:21,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:21,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2020-12-23 07:08:21,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122334400] [2020-12-23 07:08:21,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-23 07:08:21,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:21,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-23 07:08:21,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-12-23 07:08:21,587 INFO L87 Difference]: Start difference. First operand 123 states and 127 transitions. Second operand 51 states. [2020-12-23 07:08:21,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:21,822 INFO L93 Difference]: Finished difference Result 152 states and 161 transitions. [2020-12-23 07:08:21,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-23 07:08:21,824 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 122 [2020-12-23 07:08:21,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:21,826 INFO L225 Difference]: With dead ends: 152 [2020-12-23 07:08:21,826 INFO L226 Difference]: Without dead ends: 125 [2020-12-23 07:08:21,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 122 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 07:08:21,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-12-23 07:08:21,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2020-12-23 07:08:21,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-23 07:08:21,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 129 transitions. [2020-12-23 07:08:21,838 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 129 transitions. Word has length 122 [2020-12-23 07:08:21,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:21,839 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 129 transitions. [2020-12-23 07:08:21,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-23 07:08:21,840 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 129 transitions. [2020-12-23 07:08:21,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-23 07:08:21,841 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:21,841 INFO L422 BasicCegarLoop]: trace histogram [51, 48, 15, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:22,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:22,048 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:22,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:22,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1576835741, now seen corresponding path program 47 times [2020-12-23 07:08:22,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:22,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785350368] [2020-12-23 07:08:22,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:22,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:23,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2721 backedges. 245 proven. 2352 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2020-12-23 07:08:23,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785350368] [2020-12-23 07:08:23,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309287675] [2020-12-23 07:08:23,755 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 07:08:23,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2020-12-23 07:08:23,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:23,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-23 07:08:23,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:24,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2721 backedges. 245 proven. 2352 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2020-12-23 07:08:24,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:24,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2020-12-23 07:08:24,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605713828] [2020-12-23 07:08:24,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-23 07:08:24,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:24,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-23 07:08:24,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 07:08:24,042 INFO L87 Difference]: Start difference. First operand 125 states and 129 transitions. Second operand 52 states. [2020-12-23 07:08:24,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:24,359 INFO L93 Difference]: Finished difference Result 154 states and 163 transitions. [2020-12-23 07:08:24,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-12-23 07:08:24,359 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 124 [2020-12-23 07:08:24,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:24,360 INFO L225 Difference]: With dead ends: 154 [2020-12-23 07:08:24,361 INFO L226 Difference]: Without dead ends: 127 [2020-12-23 07:08:24,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 07:08:24,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-12-23 07:08:24,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2020-12-23 07:08:24,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-12-23 07:08:24,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 131 transitions. [2020-12-23 07:08:24,371 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 131 transitions. Word has length 124 [2020-12-23 07:08:24,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:24,372 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 131 transitions. [2020-12-23 07:08:24,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-23 07:08:24,372 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 131 transitions. [2020-12-23 07:08:24,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-12-23 07:08:24,372 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:24,373 INFO L422 BasicCegarLoop]: trace histogram [52, 49, 15, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:24,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:24,587 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:24,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:24,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1498907264, now seen corresponding path program 48 times [2020-12-23 07:08:24,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:24,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658351412] [2020-12-23 07:08:24,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:24,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:26,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2824 backedges. 250 proven. 2450 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2020-12-23 07:08:26,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658351412] [2020-12-23 07:08:26,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983527113] [2020-12-23 07:08:26,213 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 07:08:26,290 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-12-23 07:08:26,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:26,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 07:08:26,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:26,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2824 backedges. 343 proven. 9 refuted. 0 times theorem prover too weak. 2472 trivial. 0 not checked. [2020-12-23 07:08:26,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:26,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 6] total 56 [2020-12-23 07:08:26,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226341198] [2020-12-23 07:08:26,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-23 07:08:26,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:26,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-23 07:08:26,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 07:08:26,686 INFO L87 Difference]: Start difference. First operand 127 states and 131 transitions. Second operand 56 states. [2020-12-23 07:08:26,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:26,924 INFO L93 Difference]: Finished difference Result 159 states and 171 transitions. [2020-12-23 07:08:26,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-12-23 07:08:26,925 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 126 [2020-12-23 07:08:26,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:26,927 INFO L225 Difference]: With dead ends: 159 [2020-12-23 07:08:26,927 INFO L226 Difference]: Without dead ends: 132 [2020-12-23 07:08:26,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 07:08:26,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-12-23 07:08:26,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2020-12-23 07:08:26,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-12-23 07:08:26,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 136 transitions. [2020-12-23 07:08:26,944 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 136 transitions. Word has length 126 [2020-12-23 07:08:26,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:26,945 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 136 transitions. [2020-12-23 07:08:26,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-23 07:08:26,945 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 136 transitions. [2020-12-23 07:08:26,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-23 07:08:26,946 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:26,946 INFO L422 BasicCegarLoop]: trace histogram [54, 50, 15, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:27,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-12-23 07:08:27,160 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:27,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:27,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1592987272, now seen corresponding path program 49 times [2020-12-23 07:08:27,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:27,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845291797] [2020-12-23 07:08:27,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:27,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:29,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3036 backedges. 357 proven. 2550 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2020-12-23 07:08:29,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845291797] [2020-12-23 07:08:29,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930070208] [2020-12-23 07:08:29,020 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 07:08:29,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:29,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-23 07:08:29,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:29,285 INFO L134 CoverageAnalysis]: Checked inductivity of 3036 backedges. 357 proven. 2550 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2020-12-23 07:08:29,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:29,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2020-12-23 07:08:29,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073717807] [2020-12-23 07:08:29,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-23 07:08:29,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:29,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-23 07:08:29,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 07:08:29,287 INFO L87 Difference]: Start difference. First operand 131 states and 136 transitions. Second operand 54 states. [2020-12-23 07:08:29,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:29,589 INFO L93 Difference]: Finished difference Result 162 states and 173 transitions. [2020-12-23 07:08:29,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-23 07:08:29,590 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 130 [2020-12-23 07:08:29,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:29,591 INFO L225 Difference]: With dead ends: 162 [2020-12-23 07:08:29,591 INFO L226 Difference]: Without dead ends: 133 [2020-12-23 07:08:29,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 07:08:29,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-12-23 07:08:29,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2020-12-23 07:08:29,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-12-23 07:08:29,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 138 transitions. [2020-12-23 07:08:29,603 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 138 transitions. Word has length 130 [2020-12-23 07:08:29,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:29,603 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 138 transitions. [2020-12-23 07:08:29,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-23 07:08:29,603 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 138 transitions. [2020-12-23 07:08:29,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-23 07:08:29,604 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:29,604 INFO L422 BasicCegarLoop]: trace histogram [55, 51, 15, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:29,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:29,819 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:29,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:29,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1674836779, now seen corresponding path program 50 times [2020-12-23 07:08:29,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:29,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177024115] [2020-12-23 07:08:29,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:29,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:31,632 INFO L134 CoverageAnalysis]: Checked inductivity of 3145 backedges. 364 proven. 2652 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2020-12-23 07:08:31,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177024115] [2020-12-23 07:08:31,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056470404] [2020-12-23 07:08:31,632 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 07:08:31,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:08:31,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:31,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-23 07:08:31,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:31,901 INFO L134 CoverageAnalysis]: Checked inductivity of 3145 backedges. 364 proven. 2652 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2020-12-23 07:08:31,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:31,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2020-12-23 07:08:31,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703624855] [2020-12-23 07:08:31,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-23 07:08:31,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:31,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-23 07:08:31,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 07:08:31,903 INFO L87 Difference]: Start difference. First operand 133 states and 138 transitions. Second operand 55 states. [2020-12-23 07:08:32,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:32,237 INFO L93 Difference]: Finished difference Result 164 states and 175 transitions. [2020-12-23 07:08:32,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-23 07:08:32,238 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 132 [2020-12-23 07:08:32,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:32,239 INFO L225 Difference]: With dead ends: 164 [2020-12-23 07:08:32,239 INFO L226 Difference]: Without dead ends: 135 [2020-12-23 07:08:32,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 07:08:32,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-12-23 07:08:32,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2020-12-23 07:08:32,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-12-23 07:08:32,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 140 transitions. [2020-12-23 07:08:32,248 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 140 transitions. Word has length 132 [2020-12-23 07:08:32,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:32,248 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 140 transitions. [2020-12-23 07:08:32,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-23 07:08:32,248 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 140 transitions. [2020-12-23 07:08:32,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-23 07:08:32,249 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:32,249 INFO L422 BasicCegarLoop]: trace histogram [56, 52, 15, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:32,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-12-23 07:08:32,450 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:32,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:32,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1272165618, now seen corresponding path program 51 times [2020-12-23 07:08:32,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:32,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963958447] [2020-12-23 07:08:32,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:32,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:34,423 INFO L134 CoverageAnalysis]: Checked inductivity of 3256 backedges. 371 proven. 2756 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2020-12-23 07:08:34,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963958447] [2020-12-23 07:08:34,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289649253] [2020-12-23 07:08:34,424 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 07:08:34,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-23 07:08:34,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:34,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 07:08:34,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:35,450 INFO L134 CoverageAnalysis]: Checked inductivity of 3256 backedges. 380 proven. 120 refuted. 0 times theorem prover too weak. 2756 trivial. 0 not checked. [2020-12-23 07:08:35,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:35,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 18] total 71 [2020-12-23 07:08:35,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864997860] [2020-12-23 07:08:35,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-12-23 07:08:35,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:35,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-12-23 07:08:35,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1637, Invalid=3333, Unknown=0, NotChecked=0, Total=4970 [2020-12-23 07:08:35,452 INFO L87 Difference]: Start difference. First operand 135 states and 140 transitions. Second operand 71 states. [2020-12-23 07:08:38,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:38,870 INFO L93 Difference]: Finished difference Result 187 states and 209 transitions. [2020-12-23 07:08:38,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-12-23 07:08:38,870 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 134 [2020-12-23 07:08:38,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:38,872 INFO L225 Difference]: With dead ends: 187 [2020-12-23 07:08:38,872 INFO L226 Difference]: Without dead ends: 158 [2020-12-23 07:08:38,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2664 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=4976, Invalid=10276, Unknown=0, NotChecked=0, Total=15252 [2020-12-23 07:08:38,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-12-23 07:08:38,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 138. [2020-12-23 07:08:38,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-12-23 07:08:38,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 143 transitions. [2020-12-23 07:08:38,882 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 143 transitions. Word has length 134 [2020-12-23 07:08:38,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:38,882 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 143 transitions. [2020-12-23 07:08:38,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-12-23 07:08:38,882 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 143 transitions. [2020-12-23 07:08:38,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-12-23 07:08:38,883 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:38,883 INFO L422 BasicCegarLoop]: trace histogram [57, 53, 16, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:39,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-12-23 07:08:39,084 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:39,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:39,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1502674597, now seen corresponding path program 52 times [2020-12-23 07:08:39,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:39,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703675368] [2020-12-23 07:08:39,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:39,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:41,096 INFO L134 CoverageAnalysis]: Checked inductivity of 3385 backedges. 378 proven. 2862 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-23 07:08:41,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703675368] [2020-12-23 07:08:41,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129604736] [2020-12-23 07:08:41,097 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 07:08:41,187 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:08:41,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:41,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 55 conjunts are in the unsatisfiable core [2020-12-23 07:08:41,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:41,359 INFO L134 CoverageAnalysis]: Checked inductivity of 3385 backedges. 378 proven. 2862 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-23 07:08:41,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:41,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 57 [2020-12-23 07:08:41,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620739543] [2020-12-23 07:08:41,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-12-23 07:08:41,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:41,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-12-23 07:08:41,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 07:08:41,360 INFO L87 Difference]: Start difference. First operand 138 states and 143 transitions. Second operand 57 states. [2020-12-23 07:08:41,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:41,725 INFO L93 Difference]: Finished difference Result 170 states and 181 transitions. [2020-12-23 07:08:41,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-12-23 07:08:41,726 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 137 [2020-12-23 07:08:41,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:41,727 INFO L225 Difference]: With dead ends: 170 [2020-12-23 07:08:41,727 INFO L226 Difference]: Without dead ends: 140 [2020-12-23 07:08:41,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 07:08:41,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-12-23 07:08:41,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2020-12-23 07:08:41,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-12-23 07:08:41,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 145 transitions. [2020-12-23 07:08:41,735 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 145 transitions. Word has length 137 [2020-12-23 07:08:41,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:41,736 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 145 transitions. [2020-12-23 07:08:41,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-12-23 07:08:41,736 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 145 transitions. [2020-12-23 07:08:41,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-12-23 07:08:41,736 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:41,736 INFO L422 BasicCegarLoop]: trace histogram [58, 54, 16, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:41,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-12-23 07:08:41,937 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:41,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:41,938 INFO L82 PathProgramCache]: Analyzing trace with hash 525084504, now seen corresponding path program 53 times [2020-12-23 07:08:41,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:41,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33026243] [2020-12-23 07:08:41,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:41,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:44,018 INFO L134 CoverageAnalysis]: Checked inductivity of 3500 backedges. 385 proven. 2970 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-23 07:08:44,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33026243] [2020-12-23 07:08:44,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68607010] [2020-12-23 07:08:44,019 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 07:08:44,149 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 59 check-sat command(s) [2020-12-23 07:08:44,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:44,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 56 conjunts are in the unsatisfiable core [2020-12-23 07:08:44,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:44,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3500 backedges. 385 proven. 2970 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-23 07:08:44,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:44,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 58 [2020-12-23 07:08:44,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061035602] [2020-12-23 07:08:44,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-12-23 07:08:44,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:44,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-12-23 07:08:44,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-12-23 07:08:44,323 INFO L87 Difference]: Start difference. First operand 140 states and 145 transitions. Second operand 58 states. [2020-12-23 07:08:44,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:44,717 INFO L93 Difference]: Finished difference Result 172 states and 183 transitions. [2020-12-23 07:08:44,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-12-23 07:08:44,718 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 139 [2020-12-23 07:08:44,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:44,720 INFO L225 Difference]: With dead ends: 172 [2020-12-23 07:08:44,720 INFO L226 Difference]: Without dead ends: 142 [2020-12-23 07:08:44,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-12-23 07:08:44,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-12-23 07:08:44,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2020-12-23 07:08:44,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-12-23 07:08:44,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 147 transitions. [2020-12-23 07:08:44,732 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 147 transitions. Word has length 139 [2020-12-23 07:08:44,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:44,732 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 147 transitions. [2020-12-23 07:08:44,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-12-23 07:08:44,733 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 147 transitions. [2020-12-23 07:08:44,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-12-23 07:08:44,733 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:44,733 INFO L422 BasicCegarLoop]: trace histogram [59, 55, 16, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:44,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-12-23 07:08:44,944 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:44,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:44,944 INFO L82 PathProgramCache]: Analyzing trace with hash -713571819, now seen corresponding path program 54 times [2020-12-23 07:08:44,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:44,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902921771] [2020-12-23 07:08:44,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:44,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:47,110 INFO L134 CoverageAnalysis]: Checked inductivity of 3617 backedges. 392 proven. 3080 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-23 07:08:47,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902921771] [2020-12-23 07:08:47,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543347526] [2020-12-23 07:08:47,111 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 07:08:47,188 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2020-12-23 07:08:47,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:47,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 07:08:47,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:48,294 INFO L134 CoverageAnalysis]: Checked inductivity of 3617 backedges. 401 proven. 136 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2020-12-23 07:08:48,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:48,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 19] total 75 [2020-12-23 07:08:48,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885282896] [2020-12-23 07:08:48,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-12-23 07:08:48,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:48,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-12-23 07:08:48,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1823, Invalid=3727, Unknown=0, NotChecked=0, Total=5550 [2020-12-23 07:08:48,297 INFO L87 Difference]: Start difference. First operand 142 states and 147 transitions. Second operand 75 states. [2020-12-23 07:08:52,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:52,078 INFO L93 Difference]: Finished difference Result 195 states and 217 transitions. [2020-12-23 07:08:52,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-12-23 07:08:52,079 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 141 [2020-12-23 07:08:52,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:52,080 INFO L225 Difference]: With dead ends: 195 [2020-12-23 07:08:52,080 INFO L226 Difference]: Without dead ends: 165 [2020-12-23 07:08:52,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2963 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=5575, Invalid=11455, Unknown=0, NotChecked=0, Total=17030 [2020-12-23 07:08:52,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-12-23 07:08:52,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 145. [2020-12-23 07:08:52,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-12-23 07:08:52,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 150 transitions. [2020-12-23 07:08:52,091 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 150 transitions. Word has length 141 [2020-12-23 07:08:52,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:52,092 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 150 transitions. [2020-12-23 07:08:52,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-12-23 07:08:52,092 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 150 transitions. [2020-12-23 07:08:52,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-12-23 07:08:52,092 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:52,092 INFO L422 BasicCegarLoop]: trace histogram [60, 56, 17, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:52,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:52,293 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:52,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:52,294 INFO L82 PathProgramCache]: Analyzing trace with hash 904264218, now seen corresponding path program 55 times [2020-12-23 07:08:52,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:52,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449737987] [2020-12-23 07:08:52,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:52,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:54,648 INFO L134 CoverageAnalysis]: Checked inductivity of 3753 backedges. 399 proven. 3192 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-12-23 07:08:54,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449737987] [2020-12-23 07:08:54,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580729924] [2020-12-23 07:08:54,649 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 07:08:54,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:54,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-23 07:08:54,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:54,945 INFO L134 CoverageAnalysis]: Checked inductivity of 3753 backedges. 399 proven. 3192 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-12-23 07:08:54,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:54,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2020-12-23 07:08:54,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957214762] [2020-12-23 07:08:54,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-12-23 07:08:54,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:54,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-12-23 07:08:54,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 07:08:54,948 INFO L87 Difference]: Start difference. First operand 145 states and 150 transitions. Second operand 60 states. [2020-12-23 07:08:55,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:55,348 INFO L93 Difference]: Finished difference Result 178 states and 189 transitions. [2020-12-23 07:08:55,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-12-23 07:08:55,349 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 144 [2020-12-23 07:08:55,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:55,350 INFO L225 Difference]: With dead ends: 178 [2020-12-23 07:08:55,350 INFO L226 Difference]: Without dead ends: 147 [2020-12-23 07:08:55,350 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 07:08:55,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-12-23 07:08:55,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2020-12-23 07:08:55,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-12-23 07:08:55,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 152 transitions. [2020-12-23 07:08:55,363 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 152 transitions. Word has length 144 [2020-12-23 07:08:55,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:55,363 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 152 transitions. [2020-12-23 07:08:55,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-12-23 07:08:55,363 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 152 transitions. [2020-12-23 07:08:55,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-12-23 07:08:55,364 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:55,364 INFO L422 BasicCegarLoop]: trace histogram [61, 57, 17, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:55,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-12-23 07:08:55,573 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:55,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:55,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1351709315, now seen corresponding path program 56 times [2020-12-23 07:08:55,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:55,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483245619] [2020-12-23 07:08:55,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:55,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:57,952 INFO L134 CoverageAnalysis]: Checked inductivity of 3874 backedges. 406 proven. 3306 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-12-23 07:08:57,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483245619] [2020-12-23 07:08:57,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648277250] [2020-12-23 07:08:57,953 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 07:08:58,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:08:58,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:58,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 59 conjunts are in the unsatisfiable core [2020-12-23 07:08:58,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:58,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3874 backedges. 406 proven. 3306 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-12-23 07:08:58,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:58,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 61 [2020-12-23 07:08:58,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306372544] [2020-12-23 07:08:58,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-12-23 07:08:58,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:58,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-12-23 07:08:58,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-12-23 07:08:58,290 INFO L87 Difference]: Start difference. First operand 147 states and 152 transitions. Second operand 61 states. [2020-12-23 07:08:58,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:58,716 INFO L93 Difference]: Finished difference Result 180 states and 191 transitions. [2020-12-23 07:08:58,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-12-23 07:08:58,717 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 146 [2020-12-23 07:08:58,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:58,718 INFO L225 Difference]: With dead ends: 180 [2020-12-23 07:08:58,718 INFO L226 Difference]: Without dead ends: 149 [2020-12-23 07:08:58,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-12-23 07:08:58,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-12-23 07:08:58,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2020-12-23 07:08:58,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-12-23 07:08:58,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 154 transitions. [2020-12-23 07:08:58,727 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 154 transitions. Word has length 146 [2020-12-23 07:08:58,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:58,727 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 154 transitions. [2020-12-23 07:08:58,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-12-23 07:08:58,728 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 154 transitions. [2020-12-23 07:08:58,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-23 07:08:58,728 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:58,728 INFO L422 BasicCegarLoop]: trace histogram [62, 58, 17, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:58,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:58,931 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:58,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:58,932 INFO L82 PathProgramCache]: Analyzing trace with hash -383790048, now seen corresponding path program 57 times [2020-12-23 07:08:58,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:58,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296338027] [2020-12-23 07:08:58,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:58,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:01,420 INFO L134 CoverageAnalysis]: Checked inductivity of 3997 backedges. 413 proven. 3422 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-12-23 07:09:01,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296338027] [2020-12-23 07:09:01,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271365515] [2020-12-23 07:09:01,421 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 07:09:01,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-23 07:09:01,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:01,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 07:09:01,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:02,072 INFO L134 CoverageAnalysis]: Checked inductivity of 3997 backedges. 522 proven. 16 refuted. 0 times theorem prover too weak. 3459 trivial. 0 not checked. [2020-12-23 07:09:02,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:02,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 7] total 66 [2020-12-23 07:09:02,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009482887] [2020-12-23 07:09:02,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-12-23 07:09:02,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:02,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-12-23 07:09:02,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-12-23 07:09:02,074 INFO L87 Difference]: Start difference. First operand 149 states and 154 transitions. Second operand 66 states. [2020-12-23 07:09:02,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:02,434 INFO L93 Difference]: Finished difference Result 185 states and 199 transitions. [2020-12-23 07:09:02,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-12-23 07:09:02,434 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 148 [2020-12-23 07:09:02,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:02,436 INFO L225 Difference]: With dead ends: 185 [2020-12-23 07:09:02,436 INFO L226 Difference]: Without dead ends: 154 [2020-12-23 07:09:02,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-12-23 07:09:02,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-12-23 07:09:02,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2020-12-23 07:09:02,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-12-23 07:09:02,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 159 transitions. [2020-12-23 07:09:02,449 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 159 transitions. Word has length 148 [2020-12-23 07:09:02,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:02,449 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 159 transitions. [2020-12-23 07:09:02,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-12-23 07:09:02,449 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 159 transitions. [2020-12-23 07:09:02,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-12-23 07:09:02,450 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:02,450 INFO L422 BasicCegarLoop]: trace histogram [64, 59, 17, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:02,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2020-12-23 07:09:02,651 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:02,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:02,652 INFO L82 PathProgramCache]: Analyzing trace with hash -2113746008, now seen corresponding path program 58 times [2020-12-23 07:09:02,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:02,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792013229] [2020-12-23 07:09:02,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:02,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:05,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4249 backedges. 540 proven. 3540 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-12-23 07:09:05,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792013229] [2020-12-23 07:09:05,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316457146] [2020-12-23 07:09:05,254 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 07:09:05,361 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:09:05,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:05,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 61 conjunts are in the unsatisfiable core [2020-12-23 07:09:05,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:05,556 INFO L134 CoverageAnalysis]: Checked inductivity of 4249 backedges. 540 proven. 3540 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-12-23 07:09:05,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:05,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 63 [2020-12-23 07:09:05,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510111983] [2020-12-23 07:09:05,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-12-23 07:09:05,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:05,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-12-23 07:09:05,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-12-23 07:09:05,558 INFO L87 Difference]: Start difference. First operand 153 states and 159 transitions. Second operand 63 states. [2020-12-23 07:09:06,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:06,003 INFO L93 Difference]: Finished difference Result 188 states and 201 transitions. [2020-12-23 07:09:06,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-12-23 07:09:06,004 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 152 [2020-12-23 07:09:06,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:06,006 INFO L225 Difference]: With dead ends: 188 [2020-12-23 07:09:06,006 INFO L226 Difference]: Without dead ends: 155 [2020-12-23 07:09:06,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-12-23 07:09:06,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-12-23 07:09:06,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2020-12-23 07:09:06,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-12-23 07:09:06,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 161 transitions. [2020-12-23 07:09:06,021 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 161 transitions. Word has length 152 [2020-12-23 07:09:06,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:06,022 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 161 transitions. [2020-12-23 07:09:06,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-12-23 07:09:06,022 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 161 transitions. [2020-12-23 07:09:06,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-12-23 07:09:06,023 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:06,023 INFO L422 BasicCegarLoop]: trace histogram [65, 60, 17, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:06,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:06,238 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:06,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:06,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1782625269, now seen corresponding path program 59 times [2020-12-23 07:09:06,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:06,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084903639] [2020-12-23 07:09:06,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:06,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:08,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4378 backedges. 549 proven. 3660 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-12-23 07:09:08,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084903639] [2020-12-23 07:09:08,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841528549] [2020-12-23 07:09:08,977 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 07:09:09,119 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2020-12-23 07:09:09,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:09,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 62 conjunts are in the unsatisfiable core [2020-12-23 07:09:09,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:09,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4378 backedges. 549 proven. 3660 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-12-23 07:09:09,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:09,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 64 [2020-12-23 07:09:09,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772325292] [2020-12-23 07:09:09,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-12-23 07:09:09,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:09,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-12-23 07:09:09,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2020-12-23 07:09:09,322 INFO L87 Difference]: Start difference. First operand 155 states and 161 transitions. Second operand 64 states. [2020-12-23 07:09:09,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:09,782 INFO L93 Difference]: Finished difference Result 190 states and 203 transitions. [2020-12-23 07:09:09,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-12-23 07:09:09,783 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 154 [2020-12-23 07:09:09,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:09,785 INFO L225 Difference]: With dead ends: 190 [2020-12-23 07:09:09,785 INFO L226 Difference]: Without dead ends: 157 [2020-12-23 07:09:09,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2020-12-23 07:09:09,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-12-23 07:09:09,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2020-12-23 07:09:09,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-23 07:09:09,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 163 transitions. [2020-12-23 07:09:09,796 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 163 transitions. Word has length 154 [2020-12-23 07:09:09,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:09,797 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 163 transitions. [2020-12-23 07:09:09,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-12-23 07:09:09,797 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 163 transitions. [2020-12-23 07:09:09,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-12-23 07:09:09,798 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:09,798 INFO L422 BasicCegarLoop]: trace histogram [66, 61, 17, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:09,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2020-12-23 07:09:09,999 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:10,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:10,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1403174994, now seen corresponding path program 60 times [2020-12-23 07:09:10,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:10,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122399235] [2020-12-23 07:09:10,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:10,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:12,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4509 backedges. 558 proven. 3782 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-12-23 07:09:12,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122399235] [2020-12-23 07:09:12,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764382083] [2020-12-23 07:09:12,885 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 07:09:12,976 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-23 07:09:12,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:12,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 07:09:12,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:14,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4509 backedges. 574 proven. 153 refuted. 0 times theorem prover too weak. 3782 trivial. 0 not checked. [2020-12-23 07:09:14,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:14,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 20] total 82 [2020-12-23 07:09:14,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601061629] [2020-12-23 07:09:14,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-12-23 07:09:14,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:14,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-12-23 07:09:14,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2205, Invalid=4437, Unknown=0, NotChecked=0, Total=6642 [2020-12-23 07:09:14,367 INFO L87 Difference]: Start difference. First operand 157 states and 163 transitions. Second operand 82 states. [2020-12-23 07:09:19,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:19,329 INFO L93 Difference]: Finished difference Result 223 states and 252 transitions. [2020-12-23 07:09:19,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-12-23 07:09:19,330 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 156 [2020-12-23 07:09:19,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:19,331 INFO L225 Difference]: With dead ends: 223 [2020-12-23 07:09:19,331 INFO L226 Difference]: Without dead ends: 190 [2020-12-23 07:09:19,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3665 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=6669, Invalid=13923, Unknown=0, NotChecked=0, Total=20592 [2020-12-23 07:09:19,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-12-23 07:09:19,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 160. [2020-12-23 07:09:19,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-12-23 07:09:19,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 166 transitions. [2020-12-23 07:09:19,345 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 166 transitions. Word has length 156 [2020-12-23 07:09:19,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:19,345 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 166 transitions. [2020-12-23 07:09:19,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-12-23 07:09:19,345 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 166 transitions. [2020-12-23 07:09:19,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-12-23 07:09:19,346 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:19,346 INFO L422 BasicCegarLoop]: trace histogram [67, 62, 18, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:19,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:19,560 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:19,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:19,561 INFO L82 PathProgramCache]: Analyzing trace with hash -697867013, now seen corresponding path program 61 times [2020-12-23 07:09:19,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:19,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703337056] [2020-12-23 07:09:19,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:19,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:22,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4660 backedges. 567 proven. 3906 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-12-23 07:09:22,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703337056] [2020-12-23 07:09:22,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353361948] [2020-12-23 07:09:22,543 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 07:09:22,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:22,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 64 conjunts are in the unsatisfiable core [2020-12-23 07:09:22,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:22,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4660 backedges. 567 proven. 3906 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-12-23 07:09:22,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:22,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2020-12-23 07:09:22,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613301426] [2020-12-23 07:09:22,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-12-23 07:09:22,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:22,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-12-23 07:09:22,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-12-23 07:09:22,869 INFO L87 Difference]: Start difference. First operand 160 states and 166 transitions. Second operand 66 states. [2020-12-23 07:09:23,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:23,202 INFO L93 Difference]: Finished difference Result 196 states and 209 transitions. [2020-12-23 07:09:23,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-12-23 07:09:23,203 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 159 [2020-12-23 07:09:23,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:23,204 INFO L225 Difference]: With dead ends: 196 [2020-12-23 07:09:23,204 INFO L226 Difference]: Without dead ends: 162 [2020-12-23 07:09:23,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-12-23 07:09:23,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-12-23 07:09:23,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2020-12-23 07:09:23,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-12-23 07:09:23,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 168 transitions. [2020-12-23 07:09:23,220 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 168 transitions. Word has length 159 [2020-12-23 07:09:23,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:23,220 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 168 transitions. [2020-12-23 07:09:23,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-12-23 07:09:23,221 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 168 transitions. [2020-12-23 07:09:23,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-12-23 07:09:23,221 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:23,222 INFO L422 BasicCegarLoop]: trace histogram [68, 63, 18, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:23,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-12-23 07:09:23,436 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:23,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:23,437 INFO L82 PathProgramCache]: Analyzing trace with hash 430915384, now seen corresponding path program 62 times [2020-12-23 07:09:23,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:23,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484347208] [2020-12-23 07:09:23,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:23,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:26,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4795 backedges. 576 proven. 4032 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-12-23 07:09:26,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484347208] [2020-12-23 07:09:26,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892083185] [2020-12-23 07:09:26,464 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 07:09:26,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:09:26,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:26,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 65 conjunts are in the unsatisfiable core [2020-12-23 07:09:26,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:26,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4795 backedges. 576 proven. 4032 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-12-23 07:09:26,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:26,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 67 [2020-12-23 07:09:26,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373325025] [2020-12-23 07:09:26,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-12-23 07:09:26,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:26,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-12-23 07:09:26,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2020-12-23 07:09:26,799 INFO L87 Difference]: Start difference. First operand 162 states and 168 transitions. Second operand 67 states. [2020-12-23 07:09:27,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:27,222 INFO L93 Difference]: Finished difference Result 198 states and 211 transitions. [2020-12-23 07:09:27,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-12-23 07:09:27,223 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 161 [2020-12-23 07:09:27,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:27,225 INFO L225 Difference]: With dead ends: 198 [2020-12-23 07:09:27,225 INFO L226 Difference]: Without dead ends: 164 [2020-12-23 07:09:27,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2020-12-23 07:09:27,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-12-23 07:09:27,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2020-12-23 07:09:27,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-12-23 07:09:27,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 170 transitions. [2020-12-23 07:09:27,241 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 170 transitions. Word has length 161 [2020-12-23 07:09:27,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:27,242 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 170 transitions. [2020-12-23 07:09:27,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-12-23 07:09:27,242 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 170 transitions. [2020-12-23 07:09:27,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-12-23 07:09:27,243 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:27,243 INFO L422 BasicCegarLoop]: trace histogram [69, 64, 18, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:27,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:27,456 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:27,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:27,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1435926987, now seen corresponding path program 63 times [2020-12-23 07:09:27,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:27,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711762970] [2020-12-23 07:09:27,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:27,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:30,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4932 backedges. 585 proven. 4160 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-12-23 07:09:30,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711762970] [2020-12-23 07:09:30,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645468459] [2020-12-23 07:09:30,539 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 07:09:30,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-23 07:09:30,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:30,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 07:09:30,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:31,983 INFO L134 CoverageAnalysis]: Checked inductivity of 4932 backedges. 601 proven. 171 refuted. 0 times theorem prover too weak. 4160 trivial. 0 not checked. [2020-12-23 07:09:31,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:31,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 21] total 86 [2020-12-23 07:09:31,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194606264] [2020-12-23 07:09:31,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-12-23 07:09:31,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:31,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-12-23 07:09:31,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2420, Invalid=4890, Unknown=0, NotChecked=0, Total=7310 [2020-12-23 07:09:31,986 INFO L87 Difference]: Start difference. First operand 164 states and 170 transitions. Second operand 86 states. [2020-12-23 07:09:37,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:37,220 INFO L93 Difference]: Finished difference Result 231 states and 260 transitions. [2020-12-23 07:09:37,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2020-12-23 07:09:37,221 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 163 [2020-12-23 07:09:37,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:37,222 INFO L225 Difference]: With dead ends: 231 [2020-12-23 07:09:37,222 INFO L226 Difference]: Without dead ends: 197 [2020-12-23 07:09:37,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4016 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=7360, Invalid=15290, Unknown=0, NotChecked=0, Total=22650 [2020-12-23 07:09:37,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-12-23 07:09:37,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 167. [2020-12-23 07:09:37,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-12-23 07:09:37,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 173 transitions. [2020-12-23 07:09:37,235 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 173 transitions. Word has length 163 [2020-12-23 07:09:37,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:37,235 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 173 transitions. [2020-12-23 07:09:37,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-12-23 07:09:37,235 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 173 transitions. [2020-12-23 07:09:37,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-12-23 07:09:37,236 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:37,237 INFO L422 BasicCegarLoop]: trace histogram [70, 65, 19, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:37,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-12-23 07:09:37,452 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:37,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:37,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1131956806, now seen corresponding path program 64 times [2020-12-23 07:09:37,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:37,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241842519] [2020-12-23 07:09:37,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:37,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:40,679 INFO L134 CoverageAnalysis]: Checked inductivity of 5090 backedges. 594 proven. 4290 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2020-12-23 07:09:40,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241842519] [2020-12-23 07:09:40,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605772194] [2020-12-23 07:09:40,679 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 07:09:40,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:09:40,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:40,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 67 conjunts are in the unsatisfiable core [2020-12-23 07:09:40,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:41,064 INFO L134 CoverageAnalysis]: Checked inductivity of 5090 backedges. 594 proven. 4290 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2020-12-23 07:09:41,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:41,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 69 [2020-12-23 07:09:41,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897984800] [2020-12-23 07:09:41,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-12-23 07:09:41,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:41,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-12-23 07:09:41,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-12-23 07:09:41,066 INFO L87 Difference]: Start difference. First operand 167 states and 173 transitions. Second operand 69 states. [2020-12-23 07:09:41,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:41,543 INFO L93 Difference]: Finished difference Result 204 states and 217 transitions. [2020-12-23 07:09:41,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-12-23 07:09:41,544 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 166 [2020-12-23 07:09:41,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:41,546 INFO L225 Difference]: With dead ends: 204 [2020-12-23 07:09:41,546 INFO L226 Difference]: Without dead ends: 169 [2020-12-23 07:09:41,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-12-23 07:09:41,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-12-23 07:09:41,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2020-12-23 07:09:41,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-12-23 07:09:41,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 175 transitions. [2020-12-23 07:09:41,566 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 175 transitions. Word has length 166 [2020-12-23 07:09:41,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:41,566 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 175 transitions. [2020-12-23 07:09:41,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-12-23 07:09:41,566 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 175 transitions. [2020-12-23 07:09:41,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-12-23 07:09:41,568 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:41,568 INFO L422 BasicCegarLoop]: trace histogram [71, 66, 19, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:41,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-12-23 07:09:41,770 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:41,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:41,770 INFO L82 PathProgramCache]: Analyzing trace with hash 205409501, now seen corresponding path program 65 times [2020-12-23 07:09:41,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:41,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052903209] [2020-12-23 07:09:41,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:41,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:45,086 INFO L134 CoverageAnalysis]: Checked inductivity of 5231 backedges. 603 proven. 4422 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2020-12-23 07:09:45,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052903209] [2020-12-23 07:09:45,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644415248] [2020-12-23 07:09:45,087 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 07:09:45,238 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2020-12-23 07:09:45,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:45,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 68 conjunts are in the unsatisfiable core [2020-12-23 07:09:45,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:45,497 INFO L134 CoverageAnalysis]: Checked inductivity of 5231 backedges. 603 proven. 4422 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2020-12-23 07:09:45,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:45,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 70 [2020-12-23 07:09:45,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521577719] [2020-12-23 07:09:45,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-12-23 07:09:45,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:45,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-12-23 07:09:45,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2020-12-23 07:09:45,500 INFO L87 Difference]: Start difference. First operand 169 states and 175 transitions. Second operand 70 states. [2020-12-23 07:09:46,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:46,012 INFO L93 Difference]: Finished difference Result 206 states and 219 transitions. [2020-12-23 07:09:46,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-12-23 07:09:46,013 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 168 [2020-12-23 07:09:46,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:46,014 INFO L225 Difference]: With dead ends: 206 [2020-12-23 07:09:46,014 INFO L226 Difference]: Without dead ends: 171 [2020-12-23 07:09:46,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2020-12-23 07:09:46,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-12-23 07:09:46,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2020-12-23 07:09:46,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-12-23 07:09:46,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 177 transitions. [2020-12-23 07:09:46,025 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 177 transitions. Word has length 168 [2020-12-23 07:09:46,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:46,025 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 177 transitions. [2020-12-23 07:09:46,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-12-23 07:09:46,025 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 177 transitions. [2020-12-23 07:09:46,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-12-23 07:09:46,025 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:46,026 INFO L422 BasicCegarLoop]: trace histogram [72, 67, 19, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:46,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-12-23 07:09:46,226 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:46,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:46,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1219209024, now seen corresponding path program 66 times [2020-12-23 07:09:46,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:46,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255725543] [2020-12-23 07:09:46,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:46,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:49,696 INFO L134 CoverageAnalysis]: Checked inductivity of 5374 backedges. 612 proven. 4556 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2020-12-23 07:09:49,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255725543] [2020-12-23 07:09:49,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769463494] [2020-12-23 07:09:49,696 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 07:09:49,790 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2020-12-23 07:09:49,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:49,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 07:09:49,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:51,407 INFO L134 CoverageAnalysis]: Checked inductivity of 5374 backedges. 628 proven. 190 refuted. 0 times theorem prover too weak. 4556 trivial. 0 not checked. [2020-12-23 07:09:51,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:51,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 22] total 90 [2020-12-23 07:09:51,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783242172] [2020-12-23 07:09:51,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 90 states [2020-12-23 07:09:51,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:51,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2020-12-23 07:09:51,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2645, Invalid=5365, Unknown=0, NotChecked=0, Total=8010 [2020-12-23 07:09:51,409 INFO L87 Difference]: Start difference. First operand 171 states and 177 transitions. Second operand 90 states. [2020-12-23 07:09:57,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:57,171 INFO L93 Difference]: Finished difference Result 239 states and 268 transitions. [2020-12-23 07:09:57,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2020-12-23 07:09:57,172 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 170 [2020-12-23 07:09:57,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:57,174 INFO L225 Difference]: With dead ends: 239 [2020-12-23 07:09:57,174 INFO L226 Difference]: Without dead ends: 204 [2020-12-23 07:09:57,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4382 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=8085, Invalid=16721, Unknown=0, NotChecked=0, Total=24806 [2020-12-23 07:09:57,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-12-23 07:09:57,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 174. [2020-12-23 07:09:57,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-12-23 07:09:57,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 180 transitions. [2020-12-23 07:09:57,191 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 180 transitions. Word has length 170 [2020-12-23 07:09:57,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:57,192 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 180 transitions. [2020-12-23 07:09:57,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 90 states. [2020-12-23 07:09:57,192 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 180 transitions. [2020-12-23 07:09:57,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-12-23 07:09:57,193 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:57,193 INFO L422 BasicCegarLoop]: trace histogram [73, 68, 20, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:57,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:57,408 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:57,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:57,408 INFO L82 PathProgramCache]: Analyzing trace with hash -965996311, now seen corresponding path program 67 times [2020-12-23 07:09:57,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:57,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077005408] [2020-12-23 07:09:57,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:57,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:01,013 INFO L134 CoverageAnalysis]: Checked inductivity of 5539 backedges. 621 proven. 4692 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2020-12-23 07:10:01,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077005408] [2020-12-23 07:10:01,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697700709] [2020-12-23 07:10:01,014 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 07:10:01,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:01,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 70 conjunts are in the unsatisfiable core [2020-12-23 07:10:01,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:01,352 INFO L134 CoverageAnalysis]: Checked inductivity of 5539 backedges. 621 proven. 4692 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2020-12-23 07:10:01,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:01,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 72 [2020-12-23 07:10:01,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123500277] [2020-12-23 07:10:01,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-12-23 07:10:01,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:01,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-12-23 07:10:01,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2020-12-23 07:10:01,354 INFO L87 Difference]: Start difference. First operand 174 states and 180 transitions. Second operand 72 states. [2020-12-23 07:10:01,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:01,896 INFO L93 Difference]: Finished difference Result 212 states and 225 transitions. [2020-12-23 07:10:01,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-12-23 07:10:01,897 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 173 [2020-12-23 07:10:01,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:01,898 INFO L225 Difference]: With dead ends: 212 [2020-12-23 07:10:01,898 INFO L226 Difference]: Without dead ends: 176 [2020-12-23 07:10:01,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2020-12-23 07:10:01,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-12-23 07:10:01,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2020-12-23 07:10:01,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-12-23 07:10:01,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 182 transitions. [2020-12-23 07:10:01,917 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 182 transitions. Word has length 173 [2020-12-23 07:10:01,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:01,917 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 182 transitions. [2020-12-23 07:10:01,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-12-23 07:10:01,917 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 182 transitions. [2020-12-23 07:10:01,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-12-23 07:10:01,918 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:01,918 INFO L422 BasicCegarLoop]: trace histogram [74, 69, 20, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:02,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:02,128 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:02,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:02,128 INFO L82 PathProgramCache]: Analyzing trace with hash -2093564826, now seen corresponding path program 68 times [2020-12-23 07:10:02,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:02,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929049409] [2020-12-23 07:10:02,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:02,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:06,062 INFO L134 CoverageAnalysis]: Checked inductivity of 5686 backedges. 630 proven. 4830 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2020-12-23 07:10:06,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929049409] [2020-12-23 07:10:06,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897249986] [2020-12-23 07:10:06,063 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 07:10:06,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:10:06,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:06,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 71 conjunts are in the unsatisfiable core [2020-12-23 07:10:06,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:06,403 INFO L134 CoverageAnalysis]: Checked inductivity of 5686 backedges. 630 proven. 4830 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2020-12-23 07:10:06,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:06,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 73 [2020-12-23 07:10:06,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498292417] [2020-12-23 07:10:06,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-12-23 07:10:06,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:06,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-12-23 07:10:06,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2020-12-23 07:10:06,405 INFO L87 Difference]: Start difference. First operand 176 states and 182 transitions. Second operand 73 states. [2020-12-23 07:10:06,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:06,998 INFO L93 Difference]: Finished difference Result 214 states and 227 transitions. [2020-12-23 07:10:06,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-12-23 07:10:06,999 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 175 [2020-12-23 07:10:06,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:07,000 INFO L225 Difference]: With dead ends: 214 [2020-12-23 07:10:07,000 INFO L226 Difference]: Without dead ends: 178 [2020-12-23 07:10:07,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2020-12-23 07:10:07,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-12-23 07:10:07,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2020-12-23 07:10:07,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-12-23 07:10:07,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 184 transitions. [2020-12-23 07:10:07,018 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 184 transitions. Word has length 175 [2020-12-23 07:10:07,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:07,018 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 184 transitions. [2020-12-23 07:10:07,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-12-23 07:10:07,018 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 184 transitions. [2020-12-23 07:10:07,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-12-23 07:10:07,019 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:07,019 INFO L422 BasicCegarLoop]: trace histogram [75, 70, 20, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:07,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:07,235 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:07,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:07,235 INFO L82 PathProgramCache]: Analyzing trace with hash 939818147, now seen corresponding path program 69 times [2020-12-23 07:10:07,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:07,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160023288] [2020-12-23 07:10:07,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:07,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:11,144 INFO L134 CoverageAnalysis]: Checked inductivity of 5835 backedges. 639 proven. 4970 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2020-12-23 07:10:11,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160023288] [2020-12-23 07:10:11,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130720254] [2020-12-23 07:10:11,144 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 07:10:11,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-12-23 07:10:11,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:11,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 07:10:11,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:12,958 INFO L134 CoverageAnalysis]: Checked inductivity of 5835 backedges. 655 proven. 210 refuted. 0 times theorem prover too weak. 4970 trivial. 0 not checked. [2020-12-23 07:10:12,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:12,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 23] total 94 [2020-12-23 07:10:12,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524931365] [2020-12-23 07:10:12,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 94 states [2020-12-23 07:10:12,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:12,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2020-12-23 07:10:12,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2880, Invalid=5862, Unknown=0, NotChecked=0, Total=8742 [2020-12-23 07:10:12,960 INFO L87 Difference]: Start difference. First operand 178 states and 184 transitions. Second operand 94 states. [2020-12-23 07:10:19,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:19,615 INFO L93 Difference]: Finished difference Result 247 states and 276 transitions. [2020-12-23 07:10:19,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-12-23 07:10:19,616 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 177 [2020-12-23 07:10:19,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:19,618 INFO L225 Difference]: With dead ends: 247 [2020-12-23 07:10:19,618 INFO L226 Difference]: Without dead ends: 211 [2020-12-23 07:10:19,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4763 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=8844, Invalid=18216, Unknown=0, NotChecked=0, Total=27060 [2020-12-23 07:10:19,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-12-23 07:10:19,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 181. [2020-12-23 07:10:19,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-12-23 07:10:19,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 187 transitions. [2020-12-23 07:10:19,637 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 187 transitions. Word has length 177 [2020-12-23 07:10:19,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:19,637 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 187 transitions. [2020-12-23 07:10:19,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 94 states. [2020-12-23 07:10:19,637 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 187 transitions. [2020-12-23 07:10:19,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-12-23 07:10:19,638 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:19,638 INFO L422 BasicCegarLoop]: trace histogram [76, 71, 21, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:19,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2020-12-23 07:10:19,842 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:19,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:19,843 INFO L82 PathProgramCache]: Analyzing trace with hash 471497676, now seen corresponding path program 70 times [2020-12-23 07:10:19,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:19,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964132111] [2020-12-23 07:10:19,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:19,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:23,947 INFO L134 CoverageAnalysis]: Checked inductivity of 6007 backedges. 648 proven. 5112 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-12-23 07:10:23,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964132111] [2020-12-23 07:10:23,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733277619] [2020-12-23 07:10:23,947 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 07:10:24,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:10:24,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:24,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 73 conjunts are in the unsatisfiable core [2020-12-23 07:10:24,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:24,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6007 backedges. 648 proven. 5112 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-12-23 07:10:24,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:24,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 75 [2020-12-23 07:10:24,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840032432] [2020-12-23 07:10:24,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-12-23 07:10:24,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:24,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-12-23 07:10:24,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-12-23 07:10:24,366 INFO L87 Difference]: Start difference. First operand 181 states and 187 transitions. Second operand 75 states. [2020-12-23 07:10:24,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:24,810 INFO L93 Difference]: Finished difference Result 220 states and 233 transitions. [2020-12-23 07:10:24,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-12-23 07:10:24,811 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 180 [2020-12-23 07:10:24,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:24,812 INFO L225 Difference]: With dead ends: 220 [2020-12-23 07:10:24,813 INFO L226 Difference]: Without dead ends: 183 [2020-12-23 07:10:24,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-12-23 07:10:24,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-12-23 07:10:24,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2020-12-23 07:10:24,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-12-23 07:10:24,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 189 transitions. [2020-12-23 07:10:24,832 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 189 transitions. Word has length 180 [2020-12-23 07:10:24,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:24,833 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 189 transitions. [2020-12-23 07:10:24,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-12-23 07:10:24,833 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 189 transitions. [2020-12-23 07:10:24,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-12-23 07:10:24,834 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:24,834 INFO L422 BasicCegarLoop]: trace histogram [77, 72, 21, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:25,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:25,048 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:25,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:25,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1778145711, now seen corresponding path program 71 times [2020-12-23 07:10:25,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:25,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688442387] [2020-12-23 07:10:25,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:25,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:29,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 657 proven. 5256 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-12-23 07:10:29,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688442387] [2020-12-23 07:10:29,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044788467] [2020-12-23 07:10:29,237 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 07:10:29,402 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2020-12-23 07:10:29,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:29,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 74 conjunts are in the unsatisfiable core [2020-12-23 07:10:29,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:29,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 657 proven. 5256 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-12-23 07:10:29,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:29,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 76 [2020-12-23 07:10:29,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630294110] [2020-12-23 07:10:29,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-12-23 07:10:29,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:29,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-12-23 07:10:29,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2020-12-23 07:10:29,647 INFO L87 Difference]: Start difference. First operand 183 states and 189 transitions. Second operand 76 states. [2020-12-23 07:10:30,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:30,230 INFO L93 Difference]: Finished difference Result 222 states and 235 transitions. [2020-12-23 07:10:30,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-12-23 07:10:30,231 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 182 [2020-12-23 07:10:30,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:30,232 INFO L225 Difference]: With dead ends: 222 [2020-12-23 07:10:30,232 INFO L226 Difference]: Without dead ends: 185 [2020-12-23 07:10:30,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2020-12-23 07:10:30,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-12-23 07:10:30,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2020-12-23 07:10:30,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-12-23 07:10:30,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 191 transitions. [2020-12-23 07:10:30,247 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 191 transitions. Word has length 182 [2020-12-23 07:10:30,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:30,247 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 191 transitions. [2020-12-23 07:10:30,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-12-23 07:10:30,247 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 191 transitions. [2020-12-23 07:10:30,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-12-23 07:10:30,248 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:30,248 INFO L422 BasicCegarLoop]: trace histogram [78, 73, 21, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:30,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:30,453 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:30,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:30,453 INFO L82 PathProgramCache]: Analyzing trace with hash -958510382, now seen corresponding path program 72 times [2020-12-23 07:10:30,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:30,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227861942] [2020-12-23 07:10:30,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:30,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:34,746 INFO L134 CoverageAnalysis]: Checked inductivity of 6315 backedges. 666 proven. 5402 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-12-23 07:10:34,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227861942] [2020-12-23 07:10:34,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099297504] [2020-12-23 07:10:34,747 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 07:10:34,843 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2020-12-23 07:10:34,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:34,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 07:10:34,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:35,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6315 backedges. 803 proven. 25 refuted. 0 times theorem prover too weak. 5487 trivial. 0 not checked. [2020-12-23 07:10:35,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:35,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 8] total 82 [2020-12-23 07:10:35,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768923158] [2020-12-23 07:10:35,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-12-23 07:10:35,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:35,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-12-23 07:10:35,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2020-12-23 07:10:35,735 INFO L87 Difference]: Start difference. First operand 185 states and 191 transitions. Second operand 82 states. [2020-12-23 07:10:36,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:36,321 INFO L93 Difference]: Finished difference Result 227 states and 243 transitions. [2020-12-23 07:10:36,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-12-23 07:10:36,322 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 184 [2020-12-23 07:10:36,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:36,324 INFO L225 Difference]: With dead ends: 227 [2020-12-23 07:10:36,324 INFO L226 Difference]: Without dead ends: 190 [2020-12-23 07:10:36,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2020-12-23 07:10:36,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-12-23 07:10:36,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 189. [2020-12-23 07:10:36,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-12-23 07:10:36,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 196 transitions. [2020-12-23 07:10:36,343 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 196 transitions. Word has length 184 [2020-12-23 07:10:36,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:36,343 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 196 transitions. [2020-12-23 07:10:36,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-12-23 07:10:36,344 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 196 transitions. [2020-12-23 07:10:36,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-12-23 07:10:36,344 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:36,345 INFO L422 BasicCegarLoop]: trace histogram [80, 74, 21, 6, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:36,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:36,559 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:36,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:36,559 INFO L82 PathProgramCache]: Analyzing trace with hash -456733222, now seen corresponding path program 73 times [2020-12-23 07:10:36,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:36,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530730256] [2020-12-23 07:10:36,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:36,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:40,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6631 backedges. 825 proven. 5550 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-12-23 07:10:40,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530730256] [2020-12-23 07:10:40,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671201627] [2020-12-23 07:10:40,835 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 07:10:40,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:40,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 76 conjunts are in the unsatisfiable core [2020-12-23 07:10:40,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:41,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6631 backedges. 825 proven. 5550 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-12-23 07:10:41,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:41,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 78 [2020-12-23 07:10:41,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692318729] [2020-12-23 07:10:41,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-12-23 07:10:41,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:41,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-12-23 07:10:41,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-12-23 07:10:41,212 INFO L87 Difference]: Start difference. First operand 189 states and 196 transitions. Second operand 78 states. [2020-12-23 07:10:41,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:41,653 INFO L93 Difference]: Finished difference Result 230 states and 245 transitions. [2020-12-23 07:10:41,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-12-23 07:10:41,655 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 188 [2020-12-23 07:10:41,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:41,656 INFO L225 Difference]: With dead ends: 230 [2020-12-23 07:10:41,656 INFO L226 Difference]: Without dead ends: 191 [2020-12-23 07:10:41,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-12-23 07:10:41,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-12-23 07:10:41,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2020-12-23 07:10:41,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-12-23 07:10:41,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 198 transitions. [2020-12-23 07:10:41,676 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 198 transitions. Word has length 188 [2020-12-23 07:10:41,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:41,677 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 198 transitions. [2020-12-23 07:10:41,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-12-23 07:10:41,677 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 198 transitions. [2020-12-23 07:10:41,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-12-23 07:10:41,678 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:41,678 INFO L422 BasicCegarLoop]: trace histogram [81, 75, 21, 6, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:41,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-12-23 07:10:41,892 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:41,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:41,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1311381693, now seen corresponding path program 74 times [2020-12-23 07:10:41,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:41,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967626395] [2020-12-23 07:10:41,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:41,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:46,410 INFO L134 CoverageAnalysis]: Checked inductivity of 6792 backedges. 836 proven. 5700 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-12-23 07:10:46,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967626395] [2020-12-23 07:10:46,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963341098] [2020-12-23 07:10:46,410 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 07:10:46,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:10:46,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:46,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 77 conjunts are in the unsatisfiable core [2020-12-23 07:10:46,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:46,820 INFO L134 CoverageAnalysis]: Checked inductivity of 6792 backedges. 836 proven. 5700 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-12-23 07:10:46,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:46,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 79 [2020-12-23 07:10:46,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852819932] [2020-12-23 07:10:46,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-12-23 07:10:46,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:46,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-12-23 07:10:46,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2020-12-23 07:10:46,822 INFO L87 Difference]: Start difference. First operand 191 states and 198 transitions. Second operand 79 states. [2020-12-23 07:10:47,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:47,521 INFO L93 Difference]: Finished difference Result 232 states and 247 transitions. [2020-12-23 07:10:47,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-12-23 07:10:47,522 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 190 [2020-12-23 07:10:47,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:47,523 INFO L225 Difference]: With dead ends: 232 [2020-12-23 07:10:47,523 INFO L226 Difference]: Without dead ends: 193 [2020-12-23 07:10:47,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2020-12-23 07:10:47,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-12-23 07:10:47,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2020-12-23 07:10:47,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-12-23 07:10:47,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 200 transitions. [2020-12-23 07:10:47,543 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 200 transitions. Word has length 190 [2020-12-23 07:10:47,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:47,543 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 200 transitions. [2020-12-23 07:10:47,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 79 states. [2020-12-23 07:10:47,543 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 200 transitions. [2020-12-23 07:10:47,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-12-23 07:10:47,544 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:47,544 INFO L422 BasicCegarLoop]: trace histogram [82, 76, 21, 6, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:47,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:47,760 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:47,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:47,761 INFO L82 PathProgramCache]: Analyzing trace with hash -337234208, now seen corresponding path program 75 times [2020-12-23 07:10:47,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:47,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330213830] [2020-12-23 07:10:47,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:47,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:52,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6955 backedges. 847 proven. 5852 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-12-23 07:10:52,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330213830] [2020-12-23 07:10:52,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485756527] [2020-12-23 07:10:52,311 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 07:10:52,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-12-23 07:10:52,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:52,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 07:10:52,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:54,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6955 backedges. 872 proven. 231 refuted. 0 times theorem prover too weak. 5852 trivial. 0 not checked. [2020-12-23 07:10:54,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:54,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 24] total 101 [2020-12-23 07:10:54,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139769253] [2020-12-23 07:10:54,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 101 states [2020-12-23 07:10:54,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:54,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2020-12-23 07:10:54,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3356, Invalid=6744, Unknown=0, NotChecked=0, Total=10100 [2020-12-23 07:10:54,396 INFO L87 Difference]: Start difference. First operand 193 states and 200 transitions. Second operand 101 states. [2020-12-23 07:11:01,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:11:01,918 INFO L93 Difference]: Finished difference Result 277 states and 314 transitions. [2020-12-23 07:11:01,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2020-12-23 07:11:01,919 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 192 [2020-12-23 07:11:01,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:11:01,921 INFO L225 Difference]: With dead ends: 277 [2020-12-23 07:11:01,921 INFO L226 Difference]: Without dead ends: 238 [2020-12-23 07:11:01,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5644 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=10209, Invalid=21297, Unknown=0, NotChecked=0, Total=31506 [2020-12-23 07:11:01,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-12-23 07:11:01,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 196. [2020-12-23 07:11:01,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-12-23 07:11:01,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 203 transitions. [2020-12-23 07:11:01,943 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 203 transitions. Word has length 192 [2020-12-23 07:11:01,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:11:01,943 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 203 transitions. [2020-12-23 07:11:01,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 101 states. [2020-12-23 07:11:01,943 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 203 transitions. [2020-12-23 07:11:01,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-12-23 07:11:01,944 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:11:01,944 INFO L422 BasicCegarLoop]: trace histogram [83, 77, 22, 6, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:11:02,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-12-23 07:11:02,160 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:11:02,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:11:02,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1467029897, now seen corresponding path program 76 times [2020-12-23 07:11:02,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:11:02,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848504499] [2020-12-23 07:11:02,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:11:02,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:11:06,958 INFO L134 CoverageAnalysis]: Checked inductivity of 7142 backedges. 858 proven. 6006 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2020-12-23 07:11:06,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848504499] [2020-12-23 07:11:06,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010084184] [2020-12-23 07:11:06,959 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 07:11:07,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:11:07,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:11:07,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 79 conjunts are in the unsatisfiable core [2020-12-23 07:11:07,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:11:07,327 INFO L134 CoverageAnalysis]: Checked inductivity of 7142 backedges. 858 proven. 6006 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2020-12-23 07:11:07,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:11:07,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 81 [2020-12-23 07:11:07,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998863984] [2020-12-23 07:11:07,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-12-23 07:11:07,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:11:07,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-12-23 07:11:07,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2020-12-23 07:11:07,329 INFO L87 Difference]: Start difference. First operand 196 states and 203 transitions. Second operand 81 states. [2020-12-23 07:11:07,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:11:07,832 INFO L93 Difference]: Finished difference Result 238 states and 253 transitions. [2020-12-23 07:11:07,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-12-23 07:11:07,833 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 195 [2020-12-23 07:11:07,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:11:07,835 INFO L225 Difference]: With dead ends: 238 [2020-12-23 07:11:07,835 INFO L226 Difference]: Without dead ends: 198 [2020-12-23 07:11:07,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2020-12-23 07:11:07,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-12-23 07:11:07,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2020-12-23 07:11:07,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-12-23 07:11:07,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 205 transitions. [2020-12-23 07:11:07,849 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 205 transitions. Word has length 195 [2020-12-23 07:11:07,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:11:07,850 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 205 transitions. [2020-12-23 07:11:07,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2020-12-23 07:11:07,850 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 205 transitions. [2020-12-23 07:11:07,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-12-23 07:11:07,850 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:11:07,850 INFO L422 BasicCegarLoop]: trace histogram [84, 78, 22, 6, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:11:08,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:11:08,051 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:11:08,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:11:08,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1548835142, now seen corresponding path program 77 times [2020-12-23 07:11:08,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:11:08,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914436939] [2020-12-23 07:11:08,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:11:08,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat