/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/float-benchs/divmul_buf_diverge.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 06:06:21,413 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 06:06:21,416 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 06:06:21,463 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 06:06:21,464 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 06:06:21,469 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 06:06:21,473 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 06:06:21,495 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 06:06:21,499 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 06:06:21,505 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 06:06:21,510 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 06:06:21,512 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 06:06:21,512 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 06:06:21,515 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 06:06:21,518 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 06:06:21,520 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 06:06:21,521 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 06:06:21,525 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 06:06:21,532 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 06:06:21,540 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 06:06:21,542 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 06:06:21,544 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 06:06:21,546 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 06:06:21,549 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 06:06:21,559 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 06:06:21,565 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 06:06:21,566 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 06:06:21,568 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 06:06:21,569 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 06:06:21,570 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 06:06:21,570 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 06:06:21,571 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 06:06:21,578 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 06:06:21,578 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 06:06:21,579 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 06:06:21,580 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 06:06:21,581 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 06:06:21,632 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 06:06:21,632 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 06:06:21,636 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 06:06:21,637 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 06:06:21,637 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 06:06:21,637 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 06:06:21,637 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 06:06:21,637 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 06:06:21,638 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 06:06:21,638 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 06:06:21,639 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 06:06:21,639 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 06:06:21,640 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 06:06:21,640 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 06:06:21,640 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 06:06:21,640 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 06:06:21,640 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 06:06:21,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:06:21,641 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 06:06:21,641 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 06:06:21,641 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 06:06:21,641 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 06:06:21,642 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 06:06:21,642 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 06:06:21,642 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 06:06:21,642 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 06:06:22,105 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 06:06:22,139 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 06:06:22,142 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 06:06:22,143 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 06:06:22,144 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 06:06:22,145 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/divmul_buf_diverge.c [2020-12-23 06:06:22,236 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/be82e2f3a/77d1c743b9e643269b673682ef0401b2/FLAGc1377316d [2020-12-23 06:06:22,937 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 06:06:22,938 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/float-benchs/divmul_buf_diverge.c [2020-12-23 06:06:22,947 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/be82e2f3a/77d1c743b9e643269b673682ef0401b2/FLAGc1377316d [2020-12-23 06:06:23,308 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/be82e2f3a/77d1c743b9e643269b673682ef0401b2 [2020-12-23 06:06:23,312 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 06:06:23,314 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 06:06:23,319 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 06:06:23,320 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 06:06:23,324 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 06:06:23,325 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:06:23" (1/1) ... [2020-12-23 06:06:23,328 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@215cebc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:06:23, skipping insertion in model container [2020-12-23 06:06:23,328 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:06:23" (1/1) ... [2020-12-23 06:06:23,337 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 06:06:23,357 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 06:06:23,548 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/float-benchs/divmul_buf_diverge.c[617,630] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~buf~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~buf~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~buf~0,] [2020-12-23 06:06:23,571 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:06:23,582 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 06:06:23,599 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/float-benchs/divmul_buf_diverge.c[617,630] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~buf~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~buf~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~buf~0,] [2020-12-23 06:06:23,605 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:06:23,624 INFO L208 MainTranslator]: Completed translation [2020-12-23 06:06:23,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:06:23 WrapperNode [2020-12-23 06:06:23,625 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 06:06:23,626 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 06:06:23,626 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 06:06:23,627 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 06:06:23,636 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:06:23" (1/1) ... [2020-12-23 06:06:23,645 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:06:23" (1/1) ... [2020-12-23 06:06:23,668 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 06:06:23,669 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 06:06:23,670 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 06:06:23,670 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 06:06:23,680 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:06:23" (1/1) ... [2020-12-23 06:06:23,680 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:06:23" (1/1) ... [2020-12-23 06:06:23,682 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:06:23" (1/1) ... [2020-12-23 06:06:23,682 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:06:23" (1/1) ... [2020-12-23 06:06:23,688 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:06:23" (1/1) ... [2020-12-23 06:06:23,692 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:06:23" (1/1) ... [2020-12-23 06:06:23,694 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:06:23" (1/1) ... [2020-12-23 06:06:23,696 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 06:06:23,697 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 06:06:23,698 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 06:06:23,698 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 06:06:23,699 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:06:23" (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 06:06:23,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 06:06:23,812 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 06:06:23,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 06:06:23,812 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 06:06:24,094 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 06:06:24,095 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-23 06:06:24,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:06:24 BoogieIcfgContainer [2020-12-23 06:06:24,097 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 06:06:24,100 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 06:06:24,100 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 06:06:24,104 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 06:06:24,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 06:06:23" (1/3) ... [2020-12-23 06:06:24,106 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d663557 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:06:24, skipping insertion in model container [2020-12-23 06:06:24,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:06:23" (2/3) ... [2020-12-23 06:06:24,106 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d663557 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:06:24, skipping insertion in model container [2020-12-23 06:06:24,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:06:24" (3/3) ... [2020-12-23 06:06:24,109 INFO L111 eAbstractionObserver]: Analyzing ICFG divmul_buf_diverge.c [2020-12-23 06:06:24,118 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 06:06:24,123 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 06:06:24,148 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 06:06:24,212 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 06:06:24,212 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 06:06:24,212 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 06:06:24,213 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 06:06:24,213 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 06:06:24,213 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 06:06:24,213 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 06:06:24,213 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 06:06:24,230 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-12-23 06:06:24,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 06:06:24,236 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:24,237 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 06:06:24,238 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:24,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:24,245 INFO L82 PathProgramCache]: Analyzing trace with hash 889619932, now seen corresponding path program 1 times [2020-12-23 06:06:24,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:24,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593997641] [2020-12-23 06:06:24,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:24,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:24,578 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 06:06:24,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593997641] [2020-12-23 06:06:24,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:06:24,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 06:06:24,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750017889] [2020-12-23 06:06:24,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 06:06:24,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:24,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 06:06:24,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:06:24,615 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 3 states. [2020-12-23 06:06:24,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:24,678 INFO L93 Difference]: Finished difference Result 36 states and 48 transitions. [2020-12-23 06:06:24,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 06:06:24,681 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-23 06:06:24,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:24,700 INFO L225 Difference]: With dead ends: 36 [2020-12-23 06:06:24,700 INFO L226 Difference]: Without dead ends: 18 [2020-12-23 06:06:24,709 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 06:06:24,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-23 06:06:24,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2020-12-23 06:06:24,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-23 06:06:24,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-12-23 06:06:24,759 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 6 [2020-12-23 06:06:24,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:24,759 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-12-23 06:06:24,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 06:06:24,760 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-12-23 06:06:24,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 06:06:24,761 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:24,761 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:24,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 06:06:24,763 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:24,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:24,766 INFO L82 PathProgramCache]: Analyzing trace with hash -2106110421, now seen corresponding path program 1 times [2020-12-23 06:06:24,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:24,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468253502] [2020-12-23 06:06:24,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:24,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:24,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:24,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468253502] [2020-12-23 06:06:24,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671517470] [2020-12-23 06:06:24,849 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 06:06:24,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:24,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 06:06:24,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:25,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:25,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:25,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 06:06:25,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124927988] [2020-12-23 06:06:25,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 06:06:25,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:25,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 06:06:25,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:06:25,023 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 5 states. [2020-12-23 06:06:25,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:25,054 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2020-12-23 06:06:25,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 06:06:25,055 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-23 06:06:25,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:25,056 INFO L225 Difference]: With dead ends: 28 [2020-12-23 06:06:25,057 INFO L226 Difference]: Without dead ends: 24 [2020-12-23 06:06:25,058 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 06:06:25,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-23 06:06:25,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2020-12-23 06:06:25,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-23 06:06:25,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-12-23 06:06:25,063 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 10 [2020-12-23 06:06:25,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:25,063 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-12-23 06:06:25,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 06:06:25,064 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-12-23 06:06:25,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 06:06:25,065 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:25,065 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:25,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 06:06:25,279 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:25,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:25,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1633855750, now seen corresponding path program 2 times [2020-12-23 06:06:25,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:25,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771544947] [2020-12-23 06:06:25,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:25,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:25,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:25,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771544947] [2020-12-23 06:06:25,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395945673] [2020-12-23 06:06:25,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:25,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:06:25,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:25,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 06:06:25,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:25,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:25,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:25,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 06:06:25,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046241314] [2020-12-23 06:06:25,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 06:06:25,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:25,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 06:06:25,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 06:06:25,519 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 6 states. [2020-12-23 06:06:25,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:25,556 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-12-23 06:06:25,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 06:06:25,557 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-12-23 06:06:25,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:25,558 INFO L225 Difference]: With dead ends: 34 [2020-12-23 06:06:25,558 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 06:06:25,559 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 06:06:25,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 06:06:25,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2020-12-23 06:06:25,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-23 06:06:25,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-12-23 06:06:25,565 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 14 [2020-12-23 06:06:25,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:25,565 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-12-23 06:06:25,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 06:06:25,566 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-12-23 06:06:25,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 06:06:25,567 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:25,567 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:25,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:25,781 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:25,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:25,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1276878775, now seen corresponding path program 3 times [2020-12-23 06:06:25,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:25,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112439929] [2020-12-23 06:06:25,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:25,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:25,891 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:25,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112439929] [2020-12-23 06:06:25,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408936404] [2020-12-23 06:06:25,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:25,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 06:06:25,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:25,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 06:06:25,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:26,039 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:26,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:26,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 06:06:26,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178774692] [2020-12-23 06:06:26,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 06:06:26,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:26,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 06:06:26,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:06:26,042 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 7 states. [2020-12-23 06:06:26,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:26,082 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2020-12-23 06:06:26,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 06:06:26,083 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-12-23 06:06:26,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:26,084 INFO L225 Difference]: With dead ends: 40 [2020-12-23 06:06:26,084 INFO L226 Difference]: Without dead ends: 36 [2020-12-23 06:06:26,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 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 06:06:26,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-23 06:06:26,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2020-12-23 06:06:26,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 06:06:26,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-12-23 06:06:26,093 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 18 [2020-12-23 06:06:26,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:26,093 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-12-23 06:06:26,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 06:06:26,094 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-12-23 06:06:26,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 06:06:26,095 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:26,095 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:26,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:26,309 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:26,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:26,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1356343832, now seen corresponding path program 4 times [2020-12-23 06:06:26,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:26,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254431678] [2020-12-23 06:06:26,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:26,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:26,482 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:26,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254431678] [2020-12-23 06:06:26,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401879966] [2020-12-23 06:06:26,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:26,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:06:26,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:26,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 06:06:26,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:26,636 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:26,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:26,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-23 06:06:26,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030670401] [2020-12-23 06:06:26,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 06:06:26,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:26,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 06:06:26,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 06:06:26,639 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 8 states. [2020-12-23 06:06:26,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:26,712 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2020-12-23 06:06:26,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 06:06:26,713 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-12-23 06:06:26,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:26,715 INFO L225 Difference]: With dead ends: 46 [2020-12-23 06:06:26,715 INFO L226 Difference]: Without dead ends: 42 [2020-12-23 06:06:26,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 06:06:26,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-23 06:06:26,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2020-12-23 06:06:26,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-23 06:06:26,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-12-23 06:06:26,722 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 22 [2020-12-23 06:06:26,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:26,723 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-12-23 06:06:26,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 06:06:26,723 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-12-23 06:06:26,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 06:06:26,724 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:26,724 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:26,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:26,931 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:26,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:26,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1478784103, now seen corresponding path program 5 times [2020-12-23 06:06:26,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:26,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172777083] [2020-12-23 06:06:26,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:26,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:27,043 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:27,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172777083] [2020-12-23 06:06:27,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518770805] [2020-12-23 06:06:27,044 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:27,122 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 06:06:27,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:27,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 06:06:27,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:27,206 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:27,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:27,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-23 06:06:27,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890397333] [2020-12-23 06:06:27,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 06:06:27,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:27,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 06:06:27,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:06:27,209 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 9 states. [2020-12-23 06:06:27,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:27,258 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-12-23 06:06:27,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 06:06:27,259 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-12-23 06:06:27,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:27,260 INFO L225 Difference]: With dead ends: 52 [2020-12-23 06:06:27,260 INFO L226 Difference]: Without dead ends: 48 [2020-12-23 06:06:27,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 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 06:06:27,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-23 06:06:27,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2020-12-23 06:06:27,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-23 06:06:27,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2020-12-23 06:06:27,268 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 26 [2020-12-23 06:06:27,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:27,268 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2020-12-23 06:06:27,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 06:06:27,268 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2020-12-23 06:06:27,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 06:06:27,269 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:27,270 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:27,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 06:06:27,485 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:27,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:27,486 INFO L82 PathProgramCache]: Analyzing trace with hash -258670794, now seen corresponding path program 6 times [2020-12-23 06:06:27,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:27,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301713073] [2020-12-23 06:06:27,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:27,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:27,671 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:27,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301713073] [2020-12-23 06:06:27,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865437451] [2020-12-23 06:06:27,672 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:27,756 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 06:06:27,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:27,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 06:06:27,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:27,856 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:27,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:27,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 06:06:27,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992134160] [2020-12-23 06:06:27,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 06:06:27,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:27,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 06:06:27,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:06:27,859 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 10 states. [2020-12-23 06:06:27,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:27,921 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2020-12-23 06:06:27,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 06:06:27,922 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-12-23 06:06:27,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:27,923 INFO L225 Difference]: With dead ends: 58 [2020-12-23 06:06:27,923 INFO L226 Difference]: Without dead ends: 54 [2020-12-23 06:06:27,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 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 06:06:27,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-23 06:06:27,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2020-12-23 06:06:27,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-23 06:06:27,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2020-12-23 06:06:27,930 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 30 [2020-12-23 06:06:27,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:27,931 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2020-12-23 06:06:27,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 06:06:27,931 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2020-12-23 06:06:27,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 06:06:27,932 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:27,932 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:28,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:28,146 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:28,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:28,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1964345989, now seen corresponding path program 7 times [2020-12-23 06:06:28,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:28,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82163195] [2020-12-23 06:06:28,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:28,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:28,248 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:28,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82163195] [2020-12-23 06:06:28,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386190099] [2020-12-23 06:06:28,249 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:28,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:28,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 06:06:28,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:28,423 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:28,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:28,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 06:06:28,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468247472] [2020-12-23 06:06:28,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 06:06:28,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:28,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 06:06:28,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 06:06:28,429 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand 11 states. [2020-12-23 06:06:28,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:28,482 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2020-12-23 06:06:28,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 06:06:28,483 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-12-23 06:06:28,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:28,485 INFO L225 Difference]: With dead ends: 64 [2020-12-23 06:06:28,486 INFO L226 Difference]: Without dead ends: 60 [2020-12-23 06:06:28,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 06:06:28,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-23 06:06:28,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2020-12-23 06:06:28,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-23 06:06:28,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2020-12-23 06:06:28,508 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 34 [2020-12-23 06:06:28,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:28,509 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2020-12-23 06:06:28,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 06:06:28,510 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2020-12-23 06:06:28,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 06:06:28,513 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:28,513 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:28,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:28,729 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:28,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:28,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1689376340, now seen corresponding path program 8 times [2020-12-23 06:06:28,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:28,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636657272] [2020-12-23 06:06:28,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:28,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:28,885 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:28,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636657272] [2020-12-23 06:06:28,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897197049] [2020-12-23 06:06:28,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:28,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:06:28,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:28,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 06:06:28,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:29,025 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:29,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:29,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 06:06:29,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947476575] [2020-12-23 06:06:29,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 06:06:29,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:29,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 06:06:29,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 06:06:29,031 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand 12 states. [2020-12-23 06:06:29,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:29,088 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2020-12-23 06:06:29,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 06:06:29,089 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2020-12-23 06:06:29,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:29,090 INFO L225 Difference]: With dead ends: 70 [2020-12-23 06:06:29,090 INFO L226 Difference]: Without dead ends: 66 [2020-12-23 06:06:29,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 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 06:06:29,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-23 06:06:29,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2020-12-23 06:06:29,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-23 06:06:29,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2020-12-23 06:06:29,096 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 38 [2020-12-23 06:06:29,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:29,097 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2020-12-23 06:06:29,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 06:06:29,097 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2020-12-23 06:06:29,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-23 06:06:29,098 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:29,098 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:29,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 06:06:29,314 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:29,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:29,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1385538211, now seen corresponding path program 9 times [2020-12-23 06:06:29,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:29,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096921581] [2020-12-23 06:06:29,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:29,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:29,442 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:29,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096921581] [2020-12-23 06:06:29,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703427159] [2020-12-23 06:06:29,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:29,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-23 06:06:29,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:29,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 06:06:29,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:29,580 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:29,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:29,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 06:06:29,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211925394] [2020-12-23 06:06:29,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 06:06:29,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:29,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 06:06:29,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 06:06:29,583 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand 13 states. [2020-12-23 06:06:29,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:29,630 INFO L93 Difference]: Finished difference Result 76 states and 87 transitions. [2020-12-23 06:06:29,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 06:06:29,631 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 42 [2020-12-23 06:06:29,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:29,632 INFO L225 Difference]: With dead ends: 76 [2020-12-23 06:06:29,632 INFO L226 Difference]: Without dead ends: 72 [2020-12-23 06:06:29,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 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 06:06:29,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-23 06:06:29,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 67. [2020-12-23 06:06:29,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-23 06:06:29,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2020-12-23 06:06:29,638 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 42 [2020-12-23 06:06:29,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:29,638 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2020-12-23 06:06:29,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 06:06:29,639 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2020-12-23 06:06:29,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 06:06:29,640 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:29,640 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:29,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:29,854 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:29,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:29,855 INFO L82 PathProgramCache]: Analyzing trace with hash -703811726, now seen corresponding path program 10 times [2020-12-23 06:06:29,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:29,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699194220] [2020-12-23 06:06:29,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:29,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:29,987 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:29,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699194220] [2020-12-23 06:06:29,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867123594] [2020-12-23 06:06:29,988 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:30,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:06:30,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:30,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 06:06:30,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:30,155 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:30,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:30,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-23 06:06:30,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53052810] [2020-12-23 06:06:30,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 06:06:30,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:30,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 06:06:30,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 06:06:30,157 INFO L87 Difference]: Start difference. First operand 67 states and 77 transitions. Second operand 14 states. [2020-12-23 06:06:30,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:30,202 INFO L93 Difference]: Finished difference Result 82 states and 94 transitions. [2020-12-23 06:06:30,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 06:06:30,202 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 46 [2020-12-23 06:06:30,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:30,203 INFO L225 Difference]: With dead ends: 82 [2020-12-23 06:06:30,203 INFO L226 Difference]: Without dead ends: 78 [2020-12-23 06:06:30,204 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 06:06:30,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-23 06:06:30,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 73. [2020-12-23 06:06:30,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-23 06:06:30,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 84 transitions. [2020-12-23 06:06:30,209 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 84 transitions. Word has length 46 [2020-12-23 06:06:30,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:30,210 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 84 transitions. [2020-12-23 06:06:30,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 06:06:30,210 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 84 transitions. [2020-12-23 06:06:30,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-23 06:06:30,211 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:30,211 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:30,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:30,427 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:30,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:30,429 INFO L82 PathProgramCache]: Analyzing trace with hash 2055388353, now seen corresponding path program 11 times [2020-12-23 06:06:30,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:30,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981499378] [2020-12-23 06:06:30,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:30,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:30,579 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:30,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981499378] [2020-12-23 06:06:30,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554334791] [2020-12-23 06:06:30,580 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:30,636 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-23 06:06:30,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:30,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 06:06:30,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:30,714 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:30,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:30,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-23 06:06:30,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550058975] [2020-12-23 06:06:30,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 06:06:30,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:30,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 06:06:30,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 06:06:30,716 INFO L87 Difference]: Start difference. First operand 73 states and 84 transitions. Second operand 15 states. [2020-12-23 06:06:30,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:30,768 INFO L93 Difference]: Finished difference Result 88 states and 101 transitions. [2020-12-23 06:06:30,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 06:06:30,768 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 50 [2020-12-23 06:06:30,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:30,769 INFO L225 Difference]: With dead ends: 88 [2020-12-23 06:06:30,769 INFO L226 Difference]: Without dead ends: 84 [2020-12-23 06:06:30,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 06:06:30,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-23 06:06:30,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 79. [2020-12-23 06:06:30,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-23 06:06:30,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 91 transitions. [2020-12-23 06:06:30,775 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 91 transitions. Word has length 50 [2020-12-23 06:06:30,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:30,775 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 91 transitions. [2020-12-23 06:06:30,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 06:06:30,775 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 91 transitions. [2020-12-23 06:06:30,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-23 06:06:30,776 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:30,776 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:30,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 06:06:30,990 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:30,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:30,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1350333808, now seen corresponding path program 12 times [2020-12-23 06:06:30,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:30,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248185797] [2020-12-23 06:06:30,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:31,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:31,195 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:31,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248185797] [2020-12-23 06:06:31,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286664276] [2020-12-23 06:06:31,196 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:31,285 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-23 06:06:31,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:31,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 06:06:31,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:31,376 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:31,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:31,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-23 06:06:31,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704338328] [2020-12-23 06:06:31,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 06:06:31,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:31,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 06:06:31,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 06:06:31,378 INFO L87 Difference]: Start difference. First operand 79 states and 91 transitions. Second operand 16 states. [2020-12-23 06:06:31,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:31,437 INFO L93 Difference]: Finished difference Result 94 states and 108 transitions. [2020-12-23 06:06:31,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 06:06:31,438 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 54 [2020-12-23 06:06:31,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:31,438 INFO L225 Difference]: With dead ends: 94 [2020-12-23 06:06:31,438 INFO L226 Difference]: Without dead ends: 90 [2020-12-23 06:06:31,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 54 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 06:06:31,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-23 06:06:31,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 85. [2020-12-23 06:06:31,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-23 06:06:31,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 98 transitions. [2020-12-23 06:06:31,444 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 98 transitions. Word has length 54 [2020-12-23 06:06:31,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:31,444 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 98 transitions. [2020-12-23 06:06:31,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 06:06:31,444 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 98 transitions. [2020-12-23 06:06:31,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-23 06:06:31,445 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:31,445 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:31,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 06:06:31,657 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:31,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:31,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1195714337, now seen corresponding path program 13 times [2020-12-23 06:06:31,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:31,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442610857] [2020-12-23 06:06:31,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:31,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:31,872 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:31,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442610857] [2020-12-23 06:06:31,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443269323] [2020-12-23 06:06:31,872 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:31,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:31,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 06:06:31,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:32,054 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:32,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:32,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-23 06:06:32,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15140974] [2020-12-23 06:06:32,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 06:06:32,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:32,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 06:06:32,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 06:06:32,056 INFO L87 Difference]: Start difference. First operand 85 states and 98 transitions. Second operand 17 states. [2020-12-23 06:06:32,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:32,122 INFO L93 Difference]: Finished difference Result 100 states and 115 transitions. [2020-12-23 06:06:32,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 06:06:32,123 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 58 [2020-12-23 06:06:32,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:32,124 INFO L225 Difference]: With dead ends: 100 [2020-12-23 06:06:32,124 INFO L226 Difference]: Without dead ends: 96 [2020-12-23 06:06:32,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 06:06:32,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-23 06:06:32,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 91. [2020-12-23 06:06:32,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-23 06:06:32,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 105 transitions. [2020-12-23 06:06:32,129 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 105 transitions. Word has length 58 [2020-12-23 06:06:32,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:32,130 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 105 transitions. [2020-12-23 06:06:32,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 06:06:32,130 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 105 transitions. [2020-12-23 06:06:32,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-23 06:06:32,131 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:32,131 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:32,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 06:06:32,346 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:32,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:32,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1644927058, now seen corresponding path program 14 times [2020-12-23 06:06:32,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:32,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311791904] [2020-12-23 06:06:32,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:32,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:32,574 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:32,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311791904] [2020-12-23 06:06:32,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015854880] [2020-12-23 06:06:32,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:32,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:06:32,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:32,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 06:06:32,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:32,740 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:32,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:32,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-23 06:06:32,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335617468] [2020-12-23 06:06:32,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 06:06:32,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:32,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 06:06:32,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 06:06:32,745 INFO L87 Difference]: Start difference. First operand 91 states and 105 transitions. Second operand 18 states. [2020-12-23 06:06:32,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:32,825 INFO L93 Difference]: Finished difference Result 106 states and 122 transitions. [2020-12-23 06:06:32,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 06:06:32,826 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 62 [2020-12-23 06:06:32,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:32,828 INFO L225 Difference]: With dead ends: 106 [2020-12-23 06:06:32,828 INFO L226 Difference]: Without dead ends: 102 [2020-12-23 06:06:32,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 62 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 06:06:32,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-23 06:06:32,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 97. [2020-12-23 06:06:32,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-23 06:06:32,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 112 transitions. [2020-12-23 06:06:32,837 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 112 transitions. Word has length 62 [2020-12-23 06:06:32,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:32,837 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 112 transitions. [2020-12-23 06:06:32,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 06:06:32,838 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 112 transitions. [2020-12-23 06:06:32,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-23 06:06:32,839 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:32,839 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:33,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:33,055 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:33,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:33,056 INFO L82 PathProgramCache]: Analyzing trace with hash 454817533, now seen corresponding path program 15 times [2020-12-23 06:06:33,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:33,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895324554] [2020-12-23 06:06:33,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:33,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:33,293 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:33,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895324554] [2020-12-23 06:06:33,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332878117] [2020-12-23 06:06:33,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:33,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-23 06:06:33,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:33,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 06:06:33,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:33,482 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:33,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:33,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-23 06:06:33,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775164529] [2020-12-23 06:06:33,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 06:06:33,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:33,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 06:06:33,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 06:06:33,485 INFO L87 Difference]: Start difference. First operand 97 states and 112 transitions. Second operand 19 states. [2020-12-23 06:06:33,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:33,547 INFO L93 Difference]: Finished difference Result 112 states and 129 transitions. [2020-12-23 06:06:33,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 06:06:33,548 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 66 [2020-12-23 06:06:33,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:33,549 INFO L225 Difference]: With dead ends: 112 [2020-12-23 06:06:33,549 INFO L226 Difference]: Without dead ends: 108 [2020-12-23 06:06:33,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 66 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 06:06:33,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-23 06:06:33,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 103. [2020-12-23 06:06:33,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-12-23 06:06:33,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 119 transitions. [2020-12-23 06:06:33,554 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 119 transitions. Word has length 66 [2020-12-23 06:06:33,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:33,555 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 119 transitions. [2020-12-23 06:06:33,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 06:06:33,555 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 119 transitions. [2020-12-23 06:06:33,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-23 06:06:33,555 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:33,556 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:33,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 06:06:33,770 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:33,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:33,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1875032372, now seen corresponding path program 16 times [2020-12-23 06:06:33,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:33,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24986860] [2020-12-23 06:06:33,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:33,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:34,022 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:34,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24986860] [2020-12-23 06:06:34,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112188962] [2020-12-23 06:06:34,023 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:34,094 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:06:34,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:34,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 06:06:34,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:34,220 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:34,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:34,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-23 06:06:34,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397672588] [2020-12-23 06:06:34,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 06:06:34,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:34,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 06:06:34,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 06:06:34,223 INFO L87 Difference]: Start difference. First operand 103 states and 119 transitions. Second operand 20 states. [2020-12-23 06:06:34,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:34,297 INFO L93 Difference]: Finished difference Result 118 states and 136 transitions. [2020-12-23 06:06:34,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 06:06:34,298 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 70 [2020-12-23 06:06:34,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:34,299 INFO L225 Difference]: With dead ends: 118 [2020-12-23 06:06:34,299 INFO L226 Difference]: Without dead ends: 114 [2020-12-23 06:06:34,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 06:06:34,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-12-23 06:06:34,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 109. [2020-12-23 06:06:34,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-12-23 06:06:34,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 126 transitions. [2020-12-23 06:06:34,304 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 126 transitions. Word has length 70 [2020-12-23 06:06:34,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:34,304 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 126 transitions. [2020-12-23 06:06:34,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 06:06:34,304 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 126 transitions. [2020-12-23 06:06:34,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-23 06:06:34,305 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:34,305 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:34,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 06:06:34,519 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:34,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:34,520 INFO L82 PathProgramCache]: Analyzing trace with hash -243001573, now seen corresponding path program 17 times [2020-12-23 06:06:34,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:34,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88072371] [2020-12-23 06:06:34,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:34,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:34,801 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:34,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88072371] [2020-12-23 06:06:34,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392026297] [2020-12-23 06:06:34,802 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:34,871 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-23 06:06:34,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:34,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 06:06:34,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:34,969 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:34,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:34,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-23 06:06:34,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736594297] [2020-12-23 06:06:34,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 06:06:34,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:34,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 06:06:34,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 06:06:34,971 INFO L87 Difference]: Start difference. First operand 109 states and 126 transitions. Second operand 21 states. [2020-12-23 06:06:35,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:35,049 INFO L93 Difference]: Finished difference Result 124 states and 143 transitions. [2020-12-23 06:06:35,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 06:06:35,049 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 74 [2020-12-23 06:06:35,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:35,050 INFO L225 Difference]: With dead ends: 124 [2020-12-23 06:06:35,050 INFO L226 Difference]: Without dead ends: 120 [2020-12-23 06:06:35,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 74 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 06:06:35,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-12-23 06:06:35,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 115. [2020-12-23 06:06:35,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-12-23 06:06:35,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 133 transitions. [2020-12-23 06:06:35,055 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 133 transitions. Word has length 74 [2020-12-23 06:06:35,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:35,055 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 133 transitions. [2020-12-23 06:06:35,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 06:06:35,055 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 133 transitions. [2020-12-23 06:06:35,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-23 06:06:35,056 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:35,056 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:35,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 06:06:35,272 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:35,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:35,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1220794390, now seen corresponding path program 18 times [2020-12-23 06:06:35,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:35,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774993941] [2020-12-23 06:06:35,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:35,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:35,538 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:35,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774993941] [2020-12-23 06:06:35,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071291039] [2020-12-23 06:06:35,540 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:35,625 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-23 06:06:35,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:35,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 06:06:35,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:35,759 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:35,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:35,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-23 06:06:35,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454182798] [2020-12-23 06:06:35,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 06:06:35,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:35,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 06:06:35,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 06:06:35,762 INFO L87 Difference]: Start difference. First operand 115 states and 133 transitions. Second operand 22 states. [2020-12-23 06:06:35,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:35,830 INFO L93 Difference]: Finished difference Result 130 states and 150 transitions. [2020-12-23 06:06:35,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 06:06:35,831 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 78 [2020-12-23 06:06:35,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:35,832 INFO L225 Difference]: With dead ends: 130 [2020-12-23 06:06:35,832 INFO L226 Difference]: Without dead ends: 126 [2020-12-23 06:06:35,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 78 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 06:06:35,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-23 06:06:35,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 121. [2020-12-23 06:06:35,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-12-23 06:06:35,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 140 transitions. [2020-12-23 06:06:35,837 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 140 transitions. Word has length 78 [2020-12-23 06:06:35,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:35,837 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 140 transitions. [2020-12-23 06:06:35,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 06:06:35,837 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 140 transitions. [2020-12-23 06:06:35,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-23 06:06:35,838 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:35,838 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:36,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:36,053 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:36,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:36,054 INFO L82 PathProgramCache]: Analyzing trace with hash -841926343, now seen corresponding path program 19 times [2020-12-23 06:06:36,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:36,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679879335] [2020-12-23 06:06:36,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:36,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:36,352 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:36,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679879335] [2020-12-23 06:06:36,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327172155] [2020-12-23 06:06:36,352 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:36,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:36,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 06:06:36,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:36,525 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:36,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:36,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-23 06:06:36,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578533052] [2020-12-23 06:06:36,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 06:06:36,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:36,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 06:06:36,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 06:06:36,529 INFO L87 Difference]: Start difference. First operand 121 states and 140 transitions. Second operand 23 states. [2020-12-23 06:06:36,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:36,623 INFO L93 Difference]: Finished difference Result 136 states and 157 transitions. [2020-12-23 06:06:36,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 06:06:36,623 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 82 [2020-12-23 06:06:36,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:36,625 INFO L225 Difference]: With dead ends: 136 [2020-12-23 06:06:36,625 INFO L226 Difference]: Without dead ends: 132 [2020-12-23 06:06:36,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 06:06:36,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-12-23 06:06:36,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 127. [2020-12-23 06:06:36,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-12-23 06:06:36,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 147 transitions. [2020-12-23 06:06:36,631 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 147 transitions. Word has length 82 [2020-12-23 06:06:36,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:36,631 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 147 transitions. [2020-12-23 06:06:36,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 06:06:36,631 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 147 transitions. [2020-12-23 06:06:36,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-23 06:06:36,632 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:36,632 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:36,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:36,848 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:36,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:36,849 INFO L82 PathProgramCache]: Analyzing trace with hash -2050028792, now seen corresponding path program 20 times [2020-12-23 06:06:36,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:36,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535569422] [2020-12-23 06:06:36,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:36,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:37,243 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:37,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535569422] [2020-12-23 06:06:37,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127323501] [2020-12-23 06:06:37,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:37,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:06:37,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:37,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 06:06:37,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:37,484 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:37,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:37,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-23 06:06:37,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862971129] [2020-12-23 06:06:37,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 06:06:37,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:37,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 06:06:37,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-23 06:06:37,486 INFO L87 Difference]: Start difference. First operand 127 states and 147 transitions. Second operand 24 states. [2020-12-23 06:06:37,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:37,581 INFO L93 Difference]: Finished difference Result 142 states and 164 transitions. [2020-12-23 06:06:37,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 06:06:37,581 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 86 [2020-12-23 06:06:37,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:37,583 INFO L225 Difference]: With dead ends: 142 [2020-12-23 06:06:37,583 INFO L226 Difference]: Without dead ends: 138 [2020-12-23 06:06:37,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-23 06:06:37,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-12-23 06:06:37,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 133. [2020-12-23 06:06:37,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-12-23 06:06:37,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 154 transitions. [2020-12-23 06:06:37,588 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 154 transitions. Word has length 86 [2020-12-23 06:06:37,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:37,589 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 154 transitions. [2020-12-23 06:06:37,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 06:06:37,589 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 154 transitions. [2020-12-23 06:06:37,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-23 06:06:37,590 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:37,590 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:37,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-23 06:06:37,804 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:37,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:37,805 INFO L82 PathProgramCache]: Analyzing trace with hash -2082382505, now seen corresponding path program 21 times [2020-12-23 06:06:37,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:37,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157256281] [2020-12-23 06:06:37,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:37,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:38,188 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:38,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157256281] [2020-12-23 06:06:38,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811327797] [2020-12-23 06:06:38,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:38,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-12-23 06:06:38,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:38,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 06:06:38,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:38,411 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:38,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:38,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-23 06:06:38,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467863382] [2020-12-23 06:06:38,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 06:06:38,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:38,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 06:06:38,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-23 06:06:38,414 INFO L87 Difference]: Start difference. First operand 133 states and 154 transitions. Second operand 25 states. [2020-12-23 06:06:38,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:38,520 INFO L93 Difference]: Finished difference Result 148 states and 171 transitions. [2020-12-23 06:06:38,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 06:06:38,521 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 90 [2020-12-23 06:06:38,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:38,522 INFO L225 Difference]: With dead ends: 148 [2020-12-23 06:06:38,522 INFO L226 Difference]: Without dead ends: 144 [2020-12-23 06:06:38,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 90 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 06:06:38,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-12-23 06:06:38,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 139. [2020-12-23 06:06:38,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-12-23 06:06:38,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 161 transitions. [2020-12-23 06:06:38,529 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 161 transitions. Word has length 90 [2020-12-23 06:06:38,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:38,530 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 161 transitions. [2020-12-23 06:06:38,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 06:06:38,530 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 161 transitions. [2020-12-23 06:06:38,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-23 06:06:38,533 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:38,533 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:38,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 06:06:38,747 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:38,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:38,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1328287706, now seen corresponding path program 22 times [2020-12-23 06:06:38,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:38,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977362954] [2020-12-23 06:06:38,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:38,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:39,155 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:39,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977362954] [2020-12-23 06:06:39,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578235545] [2020-12-23 06:06:39,156 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:39,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:06:39,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:39,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 06:06:39,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:39,350 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:39,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:39,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-23 06:06:39,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668472266] [2020-12-23 06:06:39,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 06:06:39,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:39,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 06:06:39,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-23 06:06:39,353 INFO L87 Difference]: Start difference. First operand 139 states and 161 transitions. Second operand 26 states. [2020-12-23 06:06:39,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:39,450 INFO L93 Difference]: Finished difference Result 154 states and 178 transitions. [2020-12-23 06:06:39,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 06:06:39,451 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 94 [2020-12-23 06:06:39,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:39,452 INFO L225 Difference]: With dead ends: 154 [2020-12-23 06:06:39,452 INFO L226 Difference]: Without dead ends: 150 [2020-12-23 06:06:39,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-23 06:06:39,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-12-23 06:06:39,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 145. [2020-12-23 06:06:39,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-12-23 06:06:39,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 168 transitions. [2020-12-23 06:06:39,457 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 168 transitions. Word has length 94 [2020-12-23 06:06:39,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:39,458 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 168 transitions. [2020-12-23 06:06:39,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 06:06:39,458 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 168 transitions. [2020-12-23 06:06:39,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-23 06:06:39,459 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:39,459 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:39,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:39,673 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:39,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:39,673 INFO L82 PathProgramCache]: Analyzing trace with hash 697467765, now seen corresponding path program 23 times [2020-12-23 06:06:39,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:39,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786153403] [2020-12-23 06:06:39,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:39,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:40,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:40,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786153403] [2020-12-23 06:06:40,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672067877] [2020-12-23 06:06:40,072 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:40,161 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-12-23 06:06:40,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:40,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 06:06:40,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:40,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:40,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:40,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-23 06:06:40,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020000014] [2020-12-23 06:06:40,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 06:06:40,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:40,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 06:06:40,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-23 06:06:40,324 INFO L87 Difference]: Start difference. First operand 145 states and 168 transitions. Second operand 27 states. [2020-12-23 06:06:40,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:40,440 INFO L93 Difference]: Finished difference Result 160 states and 185 transitions. [2020-12-23 06:06:40,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 06:06:40,441 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 98 [2020-12-23 06:06:40,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:40,442 INFO L225 Difference]: With dead ends: 160 [2020-12-23 06:06:40,442 INFO L226 Difference]: Without dead ends: 156 [2020-12-23 06:06:40,443 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 98 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 06:06:40,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-12-23 06:06:40,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 151. [2020-12-23 06:06:40,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-12-23 06:06:40,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 175 transitions. [2020-12-23 06:06:40,447 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 175 transitions. Word has length 98 [2020-12-23 06:06:40,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:40,448 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 175 transitions. [2020-12-23 06:06:40,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 06:06:40,448 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 175 transitions. [2020-12-23 06:06:40,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-12-23 06:06:40,449 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:40,449 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:40,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 06:06:40,664 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:40,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:40,665 INFO L82 PathProgramCache]: Analyzing trace with hash 791205700, now seen corresponding path program 24 times [2020-12-23 06:06:40,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:40,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007404996] [2020-12-23 06:06:40,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:40,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:41,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:41,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007404996] [2020-12-23 06:06:41,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936045500] [2020-12-23 06:06:41,107 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:41,224 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-12-23 06:06:41,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:41,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 06:06:41,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:41,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:41,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:41,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-23 06:06:41,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618558685] [2020-12-23 06:06:41,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 06:06:41,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:41,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 06:06:41,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-23 06:06:41,394 INFO L87 Difference]: Start difference. First operand 151 states and 175 transitions. Second operand 28 states. [2020-12-23 06:06:41,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:41,518 INFO L93 Difference]: Finished difference Result 166 states and 192 transitions. [2020-12-23 06:06:41,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 06:06:41,519 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 102 [2020-12-23 06:06:41,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:41,520 INFO L225 Difference]: With dead ends: 166 [2020-12-23 06:06:41,520 INFO L226 Difference]: Without dead ends: 162 [2020-12-23 06:06:41,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-23 06:06:41,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-12-23 06:06:41,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 157. [2020-12-23 06:06:41,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-23 06:06:41,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 182 transitions. [2020-12-23 06:06:41,527 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 182 transitions. Word has length 102 [2020-12-23 06:06:41,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:41,527 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 182 transitions. [2020-12-23 06:06:41,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 06:06:41,527 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 182 transitions. [2020-12-23 06:06:41,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-23 06:06:41,529 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:41,529 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:41,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:41,743 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:41,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:41,744 INFO L82 PathProgramCache]: Analyzing trace with hash 381856659, now seen corresponding path program 25 times [2020-12-23 06:06:41,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:41,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430049564] [2020-12-23 06:06:41,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:41,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:42,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:42,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430049564] [2020-12-23 06:06:42,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399296914] [2020-12-23 06:06:42,235 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 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 06:06:42,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:42,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 06:06:42,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:42,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:42,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:42,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-23 06:06:42,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921266228] [2020-12-23 06:06:42,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 06:06:42,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:42,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 06:06:42,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-23 06:06:42,446 INFO L87 Difference]: Start difference. First operand 157 states and 182 transitions. Second operand 29 states. [2020-12-23 06:06:42,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:42,580 INFO L93 Difference]: Finished difference Result 172 states and 199 transitions. [2020-12-23 06:06:42,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 06:06:42,581 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 106 [2020-12-23 06:06:42,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:42,582 INFO L225 Difference]: With dead ends: 172 [2020-12-23 06:06:42,582 INFO L226 Difference]: Without dead ends: 168 [2020-12-23 06:06:42,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-23 06:06:42,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-12-23 06:06:42,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 163. [2020-12-23 06:06:42,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-12-23 06:06:42,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 189 transitions. [2020-12-23 06:06:42,588 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 189 transitions. Word has length 106 [2020-12-23 06:06:42,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:42,588 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 189 transitions. [2020-12-23 06:06:42,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 06:06:42,589 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 189 transitions. [2020-12-23 06:06:42,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-23 06:06:42,590 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:42,590 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:42,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 06:06:42,805 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:42,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:42,806 INFO L82 PathProgramCache]: Analyzing trace with hash 967557218, now seen corresponding path program 26 times [2020-12-23 06:06:42,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:42,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784312253] [2020-12-23 06:06:42,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:42,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:43,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:43,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784312253] [2020-12-23 06:06:43,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340841534] [2020-12-23 06:06:43,310 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 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 06:06:43,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:06:43,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:43,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 06:06:43,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:43,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:43,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:43,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-23 06:06:43,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627971853] [2020-12-23 06:06:43,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 06:06:43,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:43,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 06:06:43,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-23 06:06:43,545 INFO L87 Difference]: Start difference. First operand 163 states and 189 transitions. Second operand 30 states. [2020-12-23 06:06:43,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:43,674 INFO L93 Difference]: Finished difference Result 178 states and 206 transitions. [2020-12-23 06:06:43,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 06:06:43,675 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 110 [2020-12-23 06:06:43,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:43,676 INFO L225 Difference]: With dead ends: 178 [2020-12-23 06:06:43,676 INFO L226 Difference]: Without dead ends: 174 [2020-12-23 06:06:43,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-23 06:06:43,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-12-23 06:06:43,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 169. [2020-12-23 06:06:43,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-12-23 06:06:43,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 196 transitions. [2020-12-23 06:06:43,682 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 196 transitions. Word has length 110 [2020-12-23 06:06:43,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:43,682 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 196 transitions. [2020-12-23 06:06:43,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 06:06:43,682 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 196 transitions. [2020-12-23 06:06:43,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-23 06:06:43,683 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:43,683 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:43,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 06:06:43,895 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:43,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:43,895 INFO L82 PathProgramCache]: Analyzing trace with hash -447752783, now seen corresponding path program 27 times [2020-12-23 06:06:43,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:43,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324117621] [2020-12-23 06:06:43,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:43,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:44,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:44,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324117621] [2020-12-23 06:06:44,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061411009] [2020-12-23 06:06:44,429 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 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 06:06:44,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2020-12-23 06:06:44,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:44,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 06:06:44,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:44,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:44,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:44,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-12-23 06:06:44,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912423883] [2020-12-23 06:06:44,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 06:06:44,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:44,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 06:06:44,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-23 06:06:44,675 INFO L87 Difference]: Start difference. First operand 169 states and 196 transitions. Second operand 31 states. [2020-12-23 06:06:44,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:44,801 INFO L93 Difference]: Finished difference Result 184 states and 213 transitions. [2020-12-23 06:06:44,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 06:06:44,801 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 114 [2020-12-23 06:06:44,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:44,802 INFO L225 Difference]: With dead ends: 184 [2020-12-23 06:06:44,802 INFO L226 Difference]: Without dead ends: 180 [2020-12-23 06:06:44,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-23 06:06:44,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-12-23 06:06:44,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 175. [2020-12-23 06:06:44,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-12-23 06:06:44,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 203 transitions. [2020-12-23 06:06:44,808 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 203 transitions. Word has length 114 [2020-12-23 06:06:44,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:44,809 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 203 transitions. [2020-12-23 06:06:44,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 06:06:44,809 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 203 transitions. [2020-12-23 06:06:44,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-12-23 06:06:44,810 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:44,810 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:45,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 06:06:45,024 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:45,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:45,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1262136192, now seen corresponding path program 28 times [2020-12-23 06:06:45,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:45,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235679869] [2020-12-23 06:06:45,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:45,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:45,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:45,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235679869] [2020-12-23 06:06:45,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820971517] [2020-12-23 06:06:45,640 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 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 06:06:45,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:06:45,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:45,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 06:06:45,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:45,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:45,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:45,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-12-23 06:06:45,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98137056] [2020-12-23 06:06:45,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 06:06:45,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:45,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 06:06:45,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-23 06:06:45,887 INFO L87 Difference]: Start difference. First operand 175 states and 203 transitions. Second operand 32 states. [2020-12-23 06:06:46,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:46,034 INFO L93 Difference]: Finished difference Result 190 states and 220 transitions. [2020-12-23 06:06:46,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 06:06:46,035 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 118 [2020-12-23 06:06:46,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:46,036 INFO L225 Difference]: With dead ends: 190 [2020-12-23 06:06:46,036 INFO L226 Difference]: Without dead ends: 186 [2020-12-23 06:06:46,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-23 06:06:46,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-12-23 06:06:46,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 181. [2020-12-23 06:06:46,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-12-23 06:06:46,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 210 transitions. [2020-12-23 06:06:46,043 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 210 transitions. Word has length 118 [2020-12-23 06:06:46,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:46,043 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 210 transitions. [2020-12-23 06:06:46,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 06:06:46,043 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 210 transitions. [2020-12-23 06:06:46,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-12-23 06:06:46,044 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:46,044 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:46,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 06:06:46,259 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:46,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:46,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1897398735, now seen corresponding path program 29 times [2020-12-23 06:06:46,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:46,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609222558] [2020-12-23 06:06:46,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:46,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:46,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:46,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609222558] [2020-12-23 06:06:46,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747577951] [2020-12-23 06:06:46,895 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 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 06:06:47,002 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2020-12-23 06:06:47,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:47,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 06:06:47,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:47,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:47,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:47,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-12-23 06:06:47,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623250848] [2020-12-23 06:06:47,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 06:06:47,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:47,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 06:06:47,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 06:06:47,159 INFO L87 Difference]: Start difference. First operand 181 states and 210 transitions. Second operand 33 states. [2020-12-23 06:06:47,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:47,316 INFO L93 Difference]: Finished difference Result 196 states and 227 transitions. [2020-12-23 06:06:47,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 06:06:47,316 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 122 [2020-12-23 06:06:47,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:47,318 INFO L225 Difference]: With dead ends: 196 [2020-12-23 06:06:47,318 INFO L226 Difference]: Without dead ends: 192 [2020-12-23 06:06:47,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 122 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 06:06:47,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-12-23 06:06:47,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 187. [2020-12-23 06:06:47,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-12-23 06:06:47,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 217 transitions. [2020-12-23 06:06:47,324 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 217 transitions. Word has length 122 [2020-12-23 06:06:47,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:47,324 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 217 transitions. [2020-12-23 06:06:47,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 06:06:47,324 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 217 transitions. [2020-12-23 06:06:47,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-12-23 06:06:47,325 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:47,326 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:47,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:47,540 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:47,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:47,541 INFO L82 PathProgramCache]: Analyzing trace with hash 548640926, now seen corresponding path program 30 times [2020-12-23 06:06:47,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:47,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901349690] [2020-12-23 06:06:47,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:47,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:48,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:48,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901349690] [2020-12-23 06:06:48,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135105654] [2020-12-23 06:06:48,215 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 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 06:06:48,326 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2020-12-23 06:06:48,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:48,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 06:06:48,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:48,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:48,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:48,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-12-23 06:06:48,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638886043] [2020-12-23 06:06:48,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 06:06:48,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:48,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 06:06:48,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 06:06:48,481 INFO L87 Difference]: Start difference. First operand 187 states and 217 transitions. Second operand 34 states. [2020-12-23 06:06:48,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:48,645 INFO L93 Difference]: Finished difference Result 202 states and 234 transitions. [2020-12-23 06:06:48,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-23 06:06:48,646 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 126 [2020-12-23 06:06:48,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:48,648 INFO L225 Difference]: With dead ends: 202 [2020-12-23 06:06:48,648 INFO L226 Difference]: Without dead ends: 198 [2020-12-23 06:06:48,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 06:06:48,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-12-23 06:06:48,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 193. [2020-12-23 06:06:48,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-12-23 06:06:48,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 224 transitions. [2020-12-23 06:06:48,654 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 224 transitions. Word has length 126 [2020-12-23 06:06:48,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:48,654 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 224 transitions. [2020-12-23 06:06:48,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 06:06:48,655 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 224 transitions. [2020-12-23 06:06:48,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-23 06:06:48,655 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:48,656 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:48,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:48,870 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:48,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:48,871 INFO L82 PathProgramCache]: Analyzing trace with hash -671535123, now seen corresponding path program 31 times [2020-12-23 06:06:48,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:48,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652256303] [2020-12-23 06:06:48,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:48,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:49,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:49,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652256303] [2020-12-23 06:06:49,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252185362] [2020-12-23 06:06:49,595 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 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 06:06:49,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:49,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 06:06:49,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:49,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:49,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:49,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-12-23 06:06:49,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423012245] [2020-12-23 06:06:49,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-23 06:06:49,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:49,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-23 06:06:49,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 06:06:49,848 INFO L87 Difference]: Start difference. First operand 193 states and 224 transitions. Second operand 35 states. [2020-12-23 06:06:50,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:50,001 INFO L93 Difference]: Finished difference Result 208 states and 241 transitions. [2020-12-23 06:06:50,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 06:06:50,002 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 130 [2020-12-23 06:06:50,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:50,004 INFO L225 Difference]: With dead ends: 208 [2020-12-23 06:06:50,004 INFO L226 Difference]: Without dead ends: 204 [2020-12-23 06:06:50,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 06:06:50,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-12-23 06:06:50,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 199. [2020-12-23 06:06:50,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-12-23 06:06:50,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 231 transitions. [2020-12-23 06:06:50,015 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 231 transitions. Word has length 130 [2020-12-23 06:06:50,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:50,015 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 231 transitions. [2020-12-23 06:06:50,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-23 06:06:50,015 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 231 transitions. [2020-12-23 06:06:50,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-23 06:06:50,019 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:50,019 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:50,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:50,233 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:50,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:50,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1191934020, now seen corresponding path program 32 times [2020-12-23 06:06:50,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:50,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806514906] [2020-12-23 06:06:50,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:50,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:50,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:50,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806514906] [2020-12-23 06:06:50,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358565929] [2020-12-23 06:06:50,983 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 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 06:06:51,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:06:51,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:51,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 06:06:51,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:51,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:51,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:51,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-12-23 06:06:51,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016753770] [2020-12-23 06:06:51,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-23 06:06:51,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:51,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-23 06:06:51,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 06:06:51,280 INFO L87 Difference]: Start difference. First operand 199 states and 231 transitions. Second operand 36 states. [2020-12-23 06:06:51,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:51,426 INFO L93 Difference]: Finished difference Result 214 states and 248 transitions. [2020-12-23 06:06:51,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-23 06:06:51,427 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 134 [2020-12-23 06:06:51,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:51,429 INFO L225 Difference]: With dead ends: 214 [2020-12-23 06:06:51,429 INFO L226 Difference]: Without dead ends: 210 [2020-12-23 06:06:51,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 06:06:51,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-12-23 06:06:51,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 205. [2020-12-23 06:06:51,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-12-23 06:06:51,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 238 transitions. [2020-12-23 06:06:51,436 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 238 transitions. Word has length 134 [2020-12-23 06:06:51,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:51,437 INFO L481 AbstractCegarLoop]: Abstraction has 205 states and 238 transitions. [2020-12-23 06:06:51,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-23 06:06:51,437 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 238 transitions. [2020-12-23 06:06:51,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-23 06:06:51,438 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:51,438 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:51,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-23 06:06:51,653 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:51,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:51,654 INFO L82 PathProgramCache]: Analyzing trace with hash 2043764747, now seen corresponding path program 33 times [2020-12-23 06:06:51,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:51,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415066096] [2020-12-23 06:06:51,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:51,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:52,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:52,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415066096] [2020-12-23 06:06:52,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255279761] [2020-12-23 06:06:52,437 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 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 06:06:52,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2020-12-23 06:06:52,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:52,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 06:06:52,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:52,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:52,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:52,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-12-23 06:06:52,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150024889] [2020-12-23 06:06:52,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 06:06:52,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:52,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 06:06:52,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 06:06:52,794 INFO L87 Difference]: Start difference. First operand 205 states and 238 transitions. Second operand 37 states. [2020-12-23 06:06:52,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:52,988 INFO L93 Difference]: Finished difference Result 220 states and 255 transitions. [2020-12-23 06:06:52,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 06:06:52,989 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 138 [2020-12-23 06:06:52,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:52,990 INFO L225 Difference]: With dead ends: 220 [2020-12-23 06:06:52,990 INFO L226 Difference]: Without dead ends: 216 [2020-12-23 06:06:52,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 06:06:52,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-12-23 06:06:52,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 211. [2020-12-23 06:06:52,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-12-23 06:06:52,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 245 transitions. [2020-12-23 06:06:52,997 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 245 transitions. Word has length 138 [2020-12-23 06:06:52,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:52,997 INFO L481 AbstractCegarLoop]: Abstraction has 211 states and 245 transitions. [2020-12-23 06:06:52,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 06:06:52,997 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 245 transitions. [2020-12-23 06:06:52,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-12-23 06:06:52,998 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:52,998 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:53,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:53,213 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:53,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:53,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1423669466, now seen corresponding path program 34 times [2020-12-23 06:06:53,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:53,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012507157] [2020-12-23 06:06:53,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:53,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:54,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:54,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012507157] [2020-12-23 06:06:54,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689304439] [2020-12-23 06:06:54,024 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 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 06:06:54,118 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:06:54,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:54,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 06:06:54,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:54,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:54,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:54,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-12-23 06:06:54,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81692411] [2020-12-23 06:06:54,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-23 06:06:54,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:54,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-23 06:06:54,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 06:06:54,314 INFO L87 Difference]: Start difference. First operand 211 states and 245 transitions. Second operand 38 states. [2020-12-23 06:06:54,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:54,469 INFO L93 Difference]: Finished difference Result 226 states and 262 transitions. [2020-12-23 06:06:54,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 06:06:54,474 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 142 [2020-12-23 06:06:54,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:54,476 INFO L225 Difference]: With dead ends: 226 [2020-12-23 06:06:54,476 INFO L226 Difference]: Without dead ends: 222 [2020-12-23 06:06:54,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 06:06:54,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-12-23 06:06:54,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 217. [2020-12-23 06:06:54,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-12-23 06:06:54,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 252 transitions. [2020-12-23 06:06:54,482 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 252 transitions. Word has length 142 [2020-12-23 06:06:54,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:54,483 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 252 transitions. [2020-12-23 06:06:54,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-23 06:06:54,483 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 252 transitions. [2020-12-23 06:06:54,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-12-23 06:06:54,484 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:54,484 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:54,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-23 06:06:54,698 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:54,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:54,699 INFO L82 PathProgramCache]: Analyzing trace with hash -125922775, now seen corresponding path program 35 times [2020-12-23 06:06:54,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:54,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046065126] [2020-12-23 06:06:54,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:54,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:55,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:55,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046065126] [2020-12-23 06:06:55,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84471410] [2020-12-23 06:06:55,575 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 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 06:06:55,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2020-12-23 06:06:55,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:55,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-23 06:06:55,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:55,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:55,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:55,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-12-23 06:06:55,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687083073] [2020-12-23 06:06:55,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-23 06:06:55,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:55,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-23 06:06:55,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 06:06:55,875 INFO L87 Difference]: Start difference. First operand 217 states and 252 transitions. Second operand 39 states. [2020-12-23 06:06:56,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:56,068 INFO L93 Difference]: Finished difference Result 232 states and 269 transitions. [2020-12-23 06:06:56,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-23 06:06:56,068 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 146 [2020-12-23 06:06:56,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:56,069 INFO L225 Difference]: With dead ends: 232 [2020-12-23 06:06:56,070 INFO L226 Difference]: Without dead ends: 228 [2020-12-23 06:06:56,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 146 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 06:06:56,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-12-23 06:06:56,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 223. [2020-12-23 06:06:56,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-12-23 06:06:56,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 259 transitions. [2020-12-23 06:06:56,077 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 259 transitions. Word has length 146 [2020-12-23 06:06:56,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:56,077 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 259 transitions. [2020-12-23 06:06:56,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-23 06:06:56,078 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 259 transitions. [2020-12-23 06:06:56,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-12-23 06:06:56,078 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:56,079 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:56,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:56,295 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:56,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:56,295 INFO L82 PathProgramCache]: Analyzing trace with hash 2001103864, now seen corresponding path program 36 times [2020-12-23 06:06:56,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:56,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877705719] [2020-12-23 06:06:56,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:56,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:57,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:57,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877705719] [2020-12-23 06:06:57,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793605775] [2020-12-23 06:06:57,246 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 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 06:06:57,390 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2020-12-23 06:06:57,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:57,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-23 06:06:57,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:57,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:57,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:57,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-23 06:06:57,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425420738] [2020-12-23 06:06:57,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 06:06:57,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:57,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 06:06:57,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 06:06:57,587 INFO L87 Difference]: Start difference. First operand 223 states and 259 transitions. Second operand 40 states. [2020-12-23 06:06:57,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:57,765 INFO L93 Difference]: Finished difference Result 238 states and 276 transitions. [2020-12-23 06:06:57,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-23 06:06:57,765 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 150 [2020-12-23 06:06:57,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:57,767 INFO L225 Difference]: With dead ends: 238 [2020-12-23 06:06:57,767 INFO L226 Difference]: Without dead ends: 234 [2020-12-23 06:06:57,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 150 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 06:06:57,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-12-23 06:06:57,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 229. [2020-12-23 06:06:57,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-12-23 06:06:57,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 266 transitions. [2020-12-23 06:06:57,774 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 266 transitions. Word has length 150 [2020-12-23 06:06:57,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:57,775 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 266 transitions. [2020-12-23 06:06:57,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 06:06:57,775 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 266 transitions. [2020-12-23 06:06:57,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-12-23 06:06:57,776 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:57,776 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:57,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-23 06:06:57,989 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:57,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:57,990 INFO L82 PathProgramCache]: Analyzing trace with hash 937346631, now seen corresponding path program 37 times [2020-12-23 06:06:57,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:57,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092933197] [2020-12-23 06:06:57,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:58,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:58,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:58,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092933197] [2020-12-23 06:06:58,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424258701] [2020-12-23 06:06:58,950 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 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 06:06:59,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:59,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-23 06:06:59,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:59,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:59,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:59,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-12-23 06:06:59,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016209678] [2020-12-23 06:06:59,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-23 06:06:59,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:59,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-23 06:06:59,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 06:06:59,255 INFO L87 Difference]: Start difference. First operand 229 states and 266 transitions. Second operand 41 states. [2020-12-23 06:06:59,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:59,497 INFO L93 Difference]: Finished difference Result 244 states and 283 transitions. [2020-12-23 06:06:59,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 06:06:59,498 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 154 [2020-12-23 06:06:59,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:59,499 INFO L225 Difference]: With dead ends: 244 [2020-12-23 06:06:59,500 INFO L226 Difference]: Without dead ends: 240 [2020-12-23 06:06:59,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 06:06:59,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-12-23 06:06:59,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 235. [2020-12-23 06:06:59,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-12-23 06:06:59,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 273 transitions. [2020-12-23 06:06:59,506 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 273 transitions. Word has length 154 [2020-12-23 06:06:59,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:59,507 INFO L481 AbstractCegarLoop]: Abstraction has 235 states and 273 transitions. [2020-12-23 06:06:59,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-23 06:06:59,507 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 273 transitions. [2020-12-23 06:06:59,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-12-23 06:06:59,508 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:59,508 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:59,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-23 06:06:59,721 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:59,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:59,722 INFO L82 PathProgramCache]: Analyzing trace with hash -451714794, now seen corresponding path program 38 times [2020-12-23 06:06:59,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:59,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346371753] [2020-12-23 06:06:59,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:59,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:00,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:00,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346371753] [2020-12-23 06:07:00,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220948644] [2020-12-23 06:07:00,769 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 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 06:07:00,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:07:00,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:00,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-23 06:07:00,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:01,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:01,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:01,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-12-23 06:07:01,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441467365] [2020-12-23 06:07:01,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-23 06:07:01,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:01,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-23 06:07:01,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 06:07:01,081 INFO L87 Difference]: Start difference. First operand 235 states and 273 transitions. Second operand 42 states. [2020-12-23 06:07:01,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:01,298 INFO L93 Difference]: Finished difference Result 250 states and 290 transitions. [2020-12-23 06:07:01,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-23 06:07:01,299 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 158 [2020-12-23 06:07:01,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:01,300 INFO L225 Difference]: With dead ends: 250 [2020-12-23 06:07:01,301 INFO L226 Difference]: Without dead ends: 246 [2020-12-23 06:07:01,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 158 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 06:07:01,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-12-23 06:07:01,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 241. [2020-12-23 06:07:01,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-12-23 06:07:01,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 280 transitions. [2020-12-23 06:07:01,307 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 280 transitions. Word has length 158 [2020-12-23 06:07:01,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:01,308 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 280 transitions. [2020-12-23 06:07:01,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-23 06:07:01,308 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 280 transitions. [2020-12-23 06:07:01,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-12-23 06:07:01,309 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:01,309 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:01,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-23 06:07:01,524 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:01,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:01,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1573911653, now seen corresponding path program 39 times [2020-12-23 06:07:01,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:01,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544599298] [2020-12-23 06:07:01,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:01,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:02,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:02,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544599298] [2020-12-23 06:07:02,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928708109] [2020-12-23 06:07:02,657 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 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 06:07:02,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2020-12-23 06:07:02,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:02,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-23 06:07:02,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:03,001 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:03,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:03,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-12-23 06:07:03,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334427934] [2020-12-23 06:07:03,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-23 06:07:03,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:03,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-23 06:07:03,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 06:07:03,004 INFO L87 Difference]: Start difference. First operand 241 states and 280 transitions. Second operand 43 states. [2020-12-23 06:07:03,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:03,269 INFO L93 Difference]: Finished difference Result 256 states and 297 transitions. [2020-12-23 06:07:03,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-23 06:07:03,270 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 162 [2020-12-23 06:07:03,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:03,272 INFO L225 Difference]: With dead ends: 256 [2020-12-23 06:07:03,272 INFO L226 Difference]: Without dead ends: 252 [2020-12-23 06:07:03,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 06:07:03,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-12-23 06:07:03,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 247. [2020-12-23 06:07:03,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-12-23 06:07:03,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 287 transitions. [2020-12-23 06:07:03,280 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 287 transitions. Word has length 162 [2020-12-23 06:07:03,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:03,285 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 287 transitions. [2020-12-23 06:07:03,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-23 06:07:03,286 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 287 transitions. [2020-12-23 06:07:03,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-12-23 06:07:03,287 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:03,287 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:03,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-23 06:07:03,501 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:03,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:03,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1524606924, now seen corresponding path program 40 times [2020-12-23 06:07:03,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:03,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187592113] [2020-12-23 06:07:03,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:03,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:04,658 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:04,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187592113] [2020-12-23 06:07:04,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877302259] [2020-12-23 06:07:04,658 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 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 06:07:04,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:07:04,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:04,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-23 06:07:04,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:05,002 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:05,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:05,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2020-12-23 06:07:05,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43487025] [2020-12-23 06:07:05,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-23 06:07:05,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:05,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-23 06:07:05,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 06:07:05,005 INFO L87 Difference]: Start difference. First operand 247 states and 287 transitions. Second operand 44 states. [2020-12-23 06:07:05,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:05,230 INFO L93 Difference]: Finished difference Result 262 states and 304 transitions. [2020-12-23 06:07:05,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-23 06:07:05,230 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 166 [2020-12-23 06:07:05,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:05,232 INFO L225 Difference]: With dead ends: 262 [2020-12-23 06:07:05,232 INFO L226 Difference]: Without dead ends: 258 [2020-12-23 06:07:05,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 06:07:05,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-12-23 06:07:05,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 253. [2020-12-23 06:07:05,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-12-23 06:07:05,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 294 transitions. [2020-12-23 06:07:05,240 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 294 transitions. Word has length 166 [2020-12-23 06:07:05,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:05,240 INFO L481 AbstractCegarLoop]: Abstraction has 253 states and 294 transitions. [2020-12-23 06:07:05,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-23 06:07:05,241 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 294 transitions. [2020-12-23 06:07:05,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-12-23 06:07:05,242 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:05,242 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:05,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:05,457 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:05,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:05,458 INFO L82 PathProgramCache]: Analyzing trace with hash -768592765, now seen corresponding path program 41 times [2020-12-23 06:07:05,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:05,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105431601] [2020-12-23 06:07:05,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:05,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:06,751 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:06,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105431601] [2020-12-23 06:07:06,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456330925] [2020-12-23 06:07:06,752 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 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 06:07:06,887 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2020-12-23 06:07:06,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:06,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-23 06:07:06,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:07,118 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:07,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:07,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2020-12-23 06:07:07,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977679467] [2020-12-23 06:07:07,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-23 06:07:07,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:07,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-23 06:07:07,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 06:07:07,120 INFO L87 Difference]: Start difference. First operand 253 states and 294 transitions. Second operand 45 states. [2020-12-23 06:07:07,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:07,334 INFO L93 Difference]: Finished difference Result 268 states and 311 transitions. [2020-12-23 06:07:07,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-23 06:07:07,334 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 170 [2020-12-23 06:07:07,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:07,336 INFO L225 Difference]: With dead ends: 268 [2020-12-23 06:07:07,336 INFO L226 Difference]: Without dead ends: 264 [2020-12-23 06:07:07,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 170 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 06:07:07,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-12-23 06:07:07,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 259. [2020-12-23 06:07:07,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-12-23 06:07:07,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 301 transitions. [2020-12-23 06:07:07,347 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 301 transitions. Word has length 170 [2020-12-23 06:07:07,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:07,348 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 301 transitions. [2020-12-23 06:07:07,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-23 06:07:07,348 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 301 transitions. [2020-12-23 06:07:07,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-12-23 06:07:07,349 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:07,349 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:07,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-12-23 06:07:07,564 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:07,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:07,565 INFO L82 PathProgramCache]: Analyzing trace with hash 4936018, now seen corresponding path program 42 times [2020-12-23 06:07:07,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:07,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886341737] [2020-12-23 06:07:07,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:07,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:08,816 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:08,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886341737] [2020-12-23 06:07:08,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106930290] [2020-12-23 06:07:08,817 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 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 06:07:09,000 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2020-12-23 06:07:09,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:09,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-23 06:07:09,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:09,228 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:09,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:09,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2020-12-23 06:07:09,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531948190] [2020-12-23 06:07:09,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-23 06:07:09,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:09,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-23 06:07:09,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 06:07:09,230 INFO L87 Difference]: Start difference. First operand 259 states and 301 transitions. Second operand 46 states. [2020-12-23 06:07:09,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:09,452 INFO L93 Difference]: Finished difference Result 274 states and 318 transitions. [2020-12-23 06:07:09,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-23 06:07:09,452 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 174 [2020-12-23 06:07:09,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:09,454 INFO L225 Difference]: With dead ends: 274 [2020-12-23 06:07:09,454 INFO L226 Difference]: Without dead ends: 270 [2020-12-23 06:07:09,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 06:07:09,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-12-23 06:07:09,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 265. [2020-12-23 06:07:09,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-12-23 06:07:09,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 308 transitions. [2020-12-23 06:07:09,462 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 308 transitions. Word has length 174 [2020-12-23 06:07:09,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:09,463 INFO L481 AbstractCegarLoop]: Abstraction has 265 states and 308 transitions. [2020-12-23 06:07:09,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-23 06:07:09,463 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 308 transitions. [2020-12-23 06:07:09,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-12-23 06:07:09,464 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:09,464 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:09,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:09,680 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:09,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:09,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1054699169, now seen corresponding path program 43 times [2020-12-23 06:07:09,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:09,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042715806] [2020-12-23 06:07:09,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:09,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:11,084 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:11,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042715806] [2020-12-23 06:07:11,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535002065] [2020-12-23 06:07:11,085 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 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 06:07:11,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:11,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-23 06:07:11,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:11,412 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:11,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:11,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2020-12-23 06:07:11,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803494158] [2020-12-23 06:07:11,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-23 06:07:11,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:11,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-23 06:07:11,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 06:07:11,415 INFO L87 Difference]: Start difference. First operand 265 states and 308 transitions. Second operand 47 states. [2020-12-23 06:07:11,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:11,691 INFO L93 Difference]: Finished difference Result 280 states and 325 transitions. [2020-12-23 06:07:11,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-23 06:07:11,692 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 178 [2020-12-23 06:07:11,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:11,693 INFO L225 Difference]: With dead ends: 280 [2020-12-23 06:07:11,693 INFO L226 Difference]: Without dead ends: 276 [2020-12-23 06:07:11,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 06:07:11,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-12-23 06:07:11,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 271. [2020-12-23 06:07:11,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-12-23 06:07:11,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 315 transitions. [2020-12-23 06:07:11,700 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 315 transitions. Word has length 178 [2020-12-23 06:07:11,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:11,701 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 315 transitions. [2020-12-23 06:07:11,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-23 06:07:11,701 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 315 transitions. [2020-12-23 06:07:11,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-12-23 06:07:11,702 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:11,702 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:11,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:11,916 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:11,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:11,917 INFO L82 PathProgramCache]: Analyzing trace with hash -2123215760, now seen corresponding path program 44 times [2020-12-23 06:07:11,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:11,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334475894] [2020-12-23 06:07:11,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:11,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:13,292 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:13,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334475894] [2020-12-23 06:07:13,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536230370] [2020-12-23 06:07:13,293 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 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 06:07:13,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:07:13,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:13,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-23 06:07:13,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:13,654 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:13,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:13,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2020-12-23 06:07:13,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016093403] [2020-12-23 06:07:13,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-23 06:07:13,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:13,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-23 06:07:13,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 06:07:13,655 INFO L87 Difference]: Start difference. First operand 271 states and 315 transitions. Second operand 48 states. [2020-12-23 06:07:13,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:13,891 INFO L93 Difference]: Finished difference Result 286 states and 332 transitions. [2020-12-23 06:07:13,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-23 06:07:13,891 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 182 [2020-12-23 06:07:13,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:13,893 INFO L225 Difference]: With dead ends: 286 [2020-12-23 06:07:13,893 INFO L226 Difference]: Without dead ends: 282 [2020-12-23 06:07:13,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 182 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 06:07:13,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-12-23 06:07:13,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 277. [2020-12-23 06:07:13,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-12-23 06:07:13,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 322 transitions. [2020-12-23 06:07:13,900 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 322 transitions. Word has length 182 [2020-12-23 06:07:13,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:13,901 INFO L481 AbstractCegarLoop]: Abstraction has 277 states and 322 transitions. [2020-12-23 06:07:13,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-23 06:07:13,901 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 322 transitions. [2020-12-23 06:07:13,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-12-23 06:07:13,902 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:13,902 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:14,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-23 06:07:14,117 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:14,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:14,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1883919681, now seen corresponding path program 45 times [2020-12-23 06:07:14,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:14,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628150106] [2020-12-23 06:07:14,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:14,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:15,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:15,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628150106] [2020-12-23 06:07:15,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692180099] [2020-12-23 06:07:15,702 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 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 06:07:15,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2020-12-23 06:07:15,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:15,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-23 06:07:15,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:16,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:16,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:16,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2020-12-23 06:07:16,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700486922] [2020-12-23 06:07:16,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-23 06:07:16,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:16,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-23 06:07:16,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 06:07:16,123 INFO L87 Difference]: Start difference. First operand 277 states and 322 transitions. Second operand 49 states. [2020-12-23 06:07:16,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:16,443 INFO L93 Difference]: Finished difference Result 292 states and 339 transitions. [2020-12-23 06:07:16,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-23 06:07:16,444 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 186 [2020-12-23 06:07:16,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:16,446 INFO L225 Difference]: With dead ends: 292 [2020-12-23 06:07:16,446 INFO L226 Difference]: Without dead ends: 288 [2020-12-23 06:07:16,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 06:07:16,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-12-23 06:07:16,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 283. [2020-12-23 06:07:16,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2020-12-23 06:07:16,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 329 transitions. [2020-12-23 06:07:16,455 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 329 transitions. Word has length 186 [2020-12-23 06:07:16,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:16,455 INFO L481 AbstractCegarLoop]: Abstraction has 283 states and 329 transitions. [2020-12-23 06:07:16,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-23 06:07:16,455 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 329 transitions. [2020-12-23 06:07:16,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-12-23 06:07:16,456 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:16,457 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:16,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-23 06:07:16,670 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:16,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:16,670 INFO L82 PathProgramCache]: Analyzing trace with hash -176993906, now seen corresponding path program 46 times [2020-12-23 06:07:16,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:16,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619394226] [2020-12-23 06:07:16,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:16,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:18,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:18,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619394226] [2020-12-23 06:07:18,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645262120] [2020-12-23 06:07:18,183 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 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 06:07:18,307 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:07:18,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:18,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-23 06:07:18,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:18,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:18,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:18,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2020-12-23 06:07:18,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405253681] [2020-12-23 06:07:18,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-23 06:07:18,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:18,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-23 06:07:18,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 06:07:18,550 INFO L87 Difference]: Start difference. First operand 283 states and 329 transitions. Second operand 50 states. [2020-12-23 06:07:18,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:18,792 INFO L93 Difference]: Finished difference Result 298 states and 346 transitions. [2020-12-23 06:07:18,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-23 06:07:18,793 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 190 [2020-12-23 06:07:18,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:18,794 INFO L225 Difference]: With dead ends: 298 [2020-12-23 06:07:18,794 INFO L226 Difference]: Without dead ends: 294 [2020-12-23 06:07:18,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 06:07:18,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-12-23 06:07:18,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 289. [2020-12-23 06:07:18,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2020-12-23 06:07:18,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 336 transitions. [2020-12-23 06:07:18,800 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 336 transitions. Word has length 190 [2020-12-23 06:07:18,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:18,801 INFO L481 AbstractCegarLoop]: Abstraction has 289 states and 336 transitions. [2020-12-23 06:07:18,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-23 06:07:18,801 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 336 transitions. [2020-12-23 06:07:18,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-12-23 06:07:18,802 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:18,802 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:19,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-23 06:07:19,016 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:19,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:19,016 INFO L82 PathProgramCache]: Analyzing trace with hash -224991011, now seen corresponding path program 47 times [2020-12-23 06:07:19,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:19,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675262155] [2020-12-23 06:07:19,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:19,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:20,620 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:20,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675262155] [2020-12-23 06:07:20,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243039] [2020-12-23 06:07:20,620 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 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 06:07:20,777 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2020-12-23 06:07:20,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:20,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-23 06:07:20,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:21,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:21,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:21,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2020-12-23 06:07:21,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450090178] [2020-12-23 06:07:21,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-23 06:07:21,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:21,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-23 06:07:21,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-12-23 06:07:21,032 INFO L87 Difference]: Start difference. First operand 289 states and 336 transitions. Second operand 51 states. [2020-12-23 06:07:21,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:21,471 INFO L93 Difference]: Finished difference Result 304 states and 353 transitions. [2020-12-23 06:07:21,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-23 06:07:21,472 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 194 [2020-12-23 06:07:21,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:21,473 INFO L225 Difference]: With dead ends: 304 [2020-12-23 06:07:21,474 INFO L226 Difference]: Without dead ends: 300 [2020-12-23 06:07:21,474 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 194 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 06:07:21,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-12-23 06:07:21,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 295. [2020-12-23 06:07:21,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2020-12-23 06:07:21,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 343 transitions. [2020-12-23 06:07:21,480 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 343 transitions. Word has length 194 [2020-12-23 06:07:21,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:21,481 INFO L481 AbstractCegarLoop]: Abstraction has 295 states and 343 transitions. [2020-12-23 06:07:21,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-23 06:07:21,481 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 343 transitions. [2020-12-23 06:07:21,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2020-12-23 06:07:21,482 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:21,483 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:21,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:21,697 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:21,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:21,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1798064300, now seen corresponding path program 48 times [2020-12-23 06:07:21,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:21,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725701128] [2020-12-23 06:07:21,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:21,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:23,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:23,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725701128] [2020-12-23 06:07:23,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634984663] [2020-12-23 06:07:23,388 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 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 06:07:23,581 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2020-12-23 06:07:23,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:23,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-23 06:07:23,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:23,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:23,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:23,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2020-12-23 06:07:23,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446251873] [2020-12-23 06:07:23,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-23 06:07:23,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:23,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-23 06:07:23,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 06:07:23,852 INFO L87 Difference]: Start difference. First operand 295 states and 343 transitions. Second operand 52 states. [2020-12-23 06:07:24,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:24,116 INFO L93 Difference]: Finished difference Result 310 states and 360 transitions. [2020-12-23 06:07:24,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-12-23 06:07:24,116 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 198 [2020-12-23 06:07:24,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:24,118 INFO L225 Difference]: With dead ends: 310 [2020-12-23 06:07:24,118 INFO L226 Difference]: Without dead ends: 306 [2020-12-23 06:07:24,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 06:07:24,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-12-23 06:07:24,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 301. [2020-12-23 06:07:24,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2020-12-23 06:07:24,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 350 transitions. [2020-12-23 06:07:24,126 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 350 transitions. Word has length 198 [2020-12-23 06:07:24,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:24,127 INFO L481 AbstractCegarLoop]: Abstraction has 301 states and 350 transitions. [2020-12-23 06:07:24,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-23 06:07:24,127 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 350 transitions. [2020-12-23 06:07:24,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-12-23 06:07:24,128 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:24,128 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:24,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-23 06:07:24,343 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:24,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:24,343 INFO L82 PathProgramCache]: Analyzing trace with hash -681629445, now seen corresponding path program 49 times [2020-12-23 06:07:24,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:24,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038383490] [2020-12-23 06:07:24,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:24,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:26,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:26,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038383490] [2020-12-23 06:07:26,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501051134] [2020-12-23 06:07:26,125 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 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 06:07:26,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:26,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-23 06:07:26,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:26,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:26,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:26,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2020-12-23 06:07:26,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690954215] [2020-12-23 06:07:26,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-23 06:07:26,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:26,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-23 06:07:26,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-23 06:07:26,544 INFO L87 Difference]: Start difference. First operand 301 states and 350 transitions. Second operand 53 states. [2020-12-23 06:07:26,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:26,967 INFO L93 Difference]: Finished difference Result 316 states and 367 transitions. [2020-12-23 06:07:26,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-23 06:07:26,968 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 202 [2020-12-23 06:07:26,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:26,970 INFO L225 Difference]: With dead ends: 316 [2020-12-23 06:07:26,970 INFO L226 Difference]: Without dead ends: 312 [2020-12-23 06:07:26,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-23 06:07:26,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-12-23 06:07:26,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 307. [2020-12-23 06:07:26,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2020-12-23 06:07:26,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 357 transitions. [2020-12-23 06:07:26,977 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 357 transitions. Word has length 202 [2020-12-23 06:07:26,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:26,977 INFO L481 AbstractCegarLoop]: Abstraction has 307 states and 357 transitions. [2020-12-23 06:07:26,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-23 06:07:26,977 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 357 transitions. [2020-12-23 06:07:26,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-12-23 06:07:26,979 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:26,979 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:27,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-23 06:07:27,196 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:27,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:27,197 INFO L82 PathProgramCache]: Analyzing trace with hash 863717834, now seen corresponding path program 50 times [2020-12-23 06:07:27,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:27,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045106051] [2020-12-23 06:07:27,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:27,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:28,993 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:28,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045106051] [2020-12-23 06:07:28,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353758827] [2020-12-23 06:07:28,994 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 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 06:07:29,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:07:29,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:29,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-23 06:07:29,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:29,382 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:29,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:29,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2020-12-23 06:07:29,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75559640] [2020-12-23 06:07:29,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-23 06:07:29,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:29,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-23 06:07:29,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 06:07:29,384 INFO L87 Difference]: Start difference. First operand 307 states and 357 transitions. Second operand 54 states. [2020-12-23 06:07:29,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:29,700 INFO L93 Difference]: Finished difference Result 322 states and 374 transitions. [2020-12-23 06:07:29,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-23 06:07:29,700 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 206 [2020-12-23 06:07:29,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:29,702 INFO L225 Difference]: With dead ends: 322 [2020-12-23 06:07:29,702 INFO L226 Difference]: Without dead ends: 318 [2020-12-23 06:07:29,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 06:07:29,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-12-23 06:07:29,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 313. [2020-12-23 06:07:29,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2020-12-23 06:07:29,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 364 transitions. [2020-12-23 06:07:29,708 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 364 transitions. Word has length 206 [2020-12-23 06:07:29,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:29,709 INFO L481 AbstractCegarLoop]: Abstraction has 313 states and 364 transitions. [2020-12-23 06:07:29,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-23 06:07:29,709 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 364 transitions. [2020-12-23 06:07:29,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-12-23 06:07:29,710 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:29,710 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:29,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:29,917 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:29,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:29,917 INFO L82 PathProgramCache]: Analyzing trace with hash -269718759, now seen corresponding path program 51 times [2020-12-23 06:07:29,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:29,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337913249] [2020-12-23 06:07:29,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:29,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:31,809 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:31,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337913249] [2020-12-23 06:07:31,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448642438] [2020-12-23 06:07:31,810 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 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 06:07:32,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2020-12-23 06:07:32,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:32,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-23 06:07:32,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:32,270 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:32,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:32,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2020-12-23 06:07:32,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761856201] [2020-12-23 06:07:32,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-23 06:07:32,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:32,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-23 06:07:32,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 06:07:32,272 INFO L87 Difference]: Start difference. First operand 313 states and 364 transitions. Second operand 55 states. [2020-12-23 06:07:32,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:32,581 INFO L93 Difference]: Finished difference Result 328 states and 381 transitions. [2020-12-23 06:07:32,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-23 06:07:32,582 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 210 [2020-12-23 06:07:32,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:32,584 INFO L225 Difference]: With dead ends: 328 [2020-12-23 06:07:32,584 INFO L226 Difference]: Without dead ends: 324 [2020-12-23 06:07:32,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 210 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 06:07:32,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2020-12-23 06:07:32,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 319. [2020-12-23 06:07:32,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2020-12-23 06:07:32,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 371 transitions. [2020-12-23 06:07:32,590 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 371 transitions. Word has length 210 [2020-12-23 06:07:32,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:32,591 INFO L481 AbstractCegarLoop]: Abstraction has 319 states and 371 transitions. [2020-12-23 06:07:32,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-23 06:07:32,591 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 371 transitions. [2020-12-23 06:07:32,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-12-23 06:07:32,592 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:32,592 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:32,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-12-23 06:07:32,806 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:32,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:32,806 INFO L82 PathProgramCache]: Analyzing trace with hash -516010776, now seen corresponding path program 52 times [2020-12-23 06:07:32,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:32,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503753304] [2020-12-23 06:07:32,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:32,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:34,848 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:34,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503753304] [2020-12-23 06:07:34,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175814521] [2020-12-23 06:07:34,848 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 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 06:07:34,981 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:07:34,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:34,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-23 06:07:34,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:35,247 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:35,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:35,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2020-12-23 06:07:35,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146690744] [2020-12-23 06:07:35,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-23 06:07:35,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:35,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-23 06:07:35,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 06:07:35,249 INFO L87 Difference]: Start difference. First operand 319 states and 371 transitions. Second operand 56 states. [2020-12-23 06:07:35,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:35,636 INFO L93 Difference]: Finished difference Result 334 states and 388 transitions. [2020-12-23 06:07:35,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-12-23 06:07:35,637 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 214 [2020-12-23 06:07:35,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:35,639 INFO L225 Difference]: With dead ends: 334 [2020-12-23 06:07:35,639 INFO L226 Difference]: Without dead ends: 330 [2020-12-23 06:07:35,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 06:07:35,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-12-23 06:07:35,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 325. [2020-12-23 06:07:35,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2020-12-23 06:07:35,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 378 transitions. [2020-12-23 06:07:35,646 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 378 transitions. Word has length 214 [2020-12-23 06:07:35,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:35,646 INFO L481 AbstractCegarLoop]: Abstraction has 325 states and 378 transitions. [2020-12-23 06:07:35,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-23 06:07:35,647 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 378 transitions. [2020-12-23 06:07:35,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-12-23 06:07:35,648 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:35,648 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:35,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:35,863 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:35,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:35,863 INFO L82 PathProgramCache]: Analyzing trace with hash 807186231, now seen corresponding path program 53 times [2020-12-23 06:07:35,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:35,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122304689] [2020-12-23 06:07:35,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:35,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:37,973 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:37,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122304689] [2020-12-23 06:07:37,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797541556] [2020-12-23 06:07:37,974 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 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 06:07:38,151 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2020-12-23 06:07:38,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:38,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 55 conjunts are in the unsatisfiable core [2020-12-23 06:07:38,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:38,456 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:38,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:38,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 57 [2020-12-23 06:07:38,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538216161] [2020-12-23 06:07:38,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-12-23 06:07:38,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:38,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-12-23 06:07:38,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 06:07:38,459 INFO L87 Difference]: Start difference. First operand 325 states and 378 transitions. Second operand 57 states. [2020-12-23 06:07:38,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:38,755 INFO L93 Difference]: Finished difference Result 340 states and 395 transitions. [2020-12-23 06:07:38,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-12-23 06:07:38,756 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 218 [2020-12-23 06:07:38,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:38,757 INFO L225 Difference]: With dead ends: 340 [2020-12-23 06:07:38,757 INFO L226 Difference]: Without dead ends: 336 [2020-12-23 06:07:38,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 218 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 06:07:38,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2020-12-23 06:07:38,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 331. [2020-12-23 06:07:38,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2020-12-23 06:07:38,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 385 transitions. [2020-12-23 06:07:38,764 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 385 transitions. Word has length 218 [2020-12-23 06:07:38,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:38,764 INFO L481 AbstractCegarLoop]: Abstraction has 331 states and 385 transitions. [2020-12-23 06:07:38,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-12-23 06:07:38,764 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 385 transitions. [2020-12-23 06:07:38,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-12-23 06:07:38,766 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:38,766 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:38,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-12-23 06:07:38,980 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:38,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:38,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1230197254, now seen corresponding path program 54 times [2020-12-23 06:07:38,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:38,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333214726] [2020-12-23 06:07:38,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:38,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:41,045 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:41,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333214726] [2020-12-23 06:07:41,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715057996] [2020-12-23 06:07:41,045 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 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 06:07:41,251 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2020-12-23 06:07:41,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:41,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 56 conjunts are in the unsatisfiable core [2020-12-23 06:07:41,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:41,576 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:41,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:41,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 58 [2020-12-23 06:07:41,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618278862] [2020-12-23 06:07:41,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-12-23 06:07:41,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:41,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-12-23 06:07:41,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-12-23 06:07:41,578 INFO L87 Difference]: Start difference. First operand 331 states and 385 transitions. Second operand 58 states. [2020-12-23 06:07:42,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:42,006 INFO L93 Difference]: Finished difference Result 346 states and 402 transitions. [2020-12-23 06:07:42,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-12-23 06:07:42,007 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 222 [2020-12-23 06:07:42,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:42,008 INFO L225 Difference]: With dead ends: 346 [2020-12-23 06:07:42,008 INFO L226 Difference]: Without dead ends: 342 [2020-12-23 06:07:42,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-12-23 06:07:42,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2020-12-23 06:07:42,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 337. [2020-12-23 06:07:42,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2020-12-23 06:07:42,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 392 transitions. [2020-12-23 06:07:42,015 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 392 transitions. Word has length 222 [2020-12-23 06:07:42,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:42,016 INFO L481 AbstractCegarLoop]: Abstraction has 337 states and 392 transitions. [2020-12-23 06:07:42,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-12-23 06:07:42,016 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 392 transitions. [2020-12-23 06:07:42,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-12-23 06:07:42,017 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:42,018 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:42,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-12-23 06:07:42,231 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:42,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:42,231 INFO L82 PathProgramCache]: Analyzing trace with hash -842140331, now seen corresponding path program 55 times [2020-12-23 06:07:42,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:42,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012779126] [2020-12-23 06:07:42,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:42,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:44,508 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:44,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012779126] [2020-12-23 06:07:44,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69328682] [2020-12-23 06:07:44,509 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 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 06:07:44,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:44,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 57 conjunts are in the unsatisfiable core [2020-12-23 06:07:44,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:44,894 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:44,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:44,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 59 [2020-12-23 06:07:44,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123230910] [2020-12-23 06:07:44,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-12-23 06:07:44,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:44,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-12-23 06:07:44,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-12-23 06:07:44,896 INFO L87 Difference]: Start difference. First operand 337 states and 392 transitions. Second operand 59 states. [2020-12-23 06:07:45,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:45,299 INFO L93 Difference]: Finished difference Result 352 states and 409 transitions. [2020-12-23 06:07:45,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-12-23 06:07:45,300 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 226 [2020-12-23 06:07:45,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:45,301 INFO L225 Difference]: With dead ends: 352 [2020-12-23 06:07:45,302 INFO L226 Difference]: Without dead ends: 348 [2020-12-23 06:07:45,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-12-23 06:07:45,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-12-23 06:07:45,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 343. [2020-12-23 06:07:45,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2020-12-23 06:07:45,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 399 transitions. [2020-12-23 06:07:45,308 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 399 transitions. Word has length 226 [2020-12-23 06:07:45,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:45,309 INFO L481 AbstractCegarLoop]: Abstraction has 343 states and 399 transitions. [2020-12-23 06:07:45,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-12-23 06:07:45,309 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 399 transitions. [2020-12-23 06:07:45,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2020-12-23 06:07:45,311 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:45,311 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:45,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:45,524 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:45,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:45,525 INFO L82 PathProgramCache]: Analyzing trace with hash -2103944924, now seen corresponding path program 56 times [2020-12-23 06:07:45,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:45,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262569368] [2020-12-23 06:07:45,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:45,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:47,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:47,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262569368] [2020-12-23 06:07:47,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437253133] [2020-12-23 06:07:47,836 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 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 06:07:47,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:07:47,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:47,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-23 06:07:47,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:48,304 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:48,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:48,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2020-12-23 06:07:48,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514702098] [2020-12-23 06:07:48,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-12-23 06:07:48,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:48,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-12-23 06:07:48,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 06:07:48,306 INFO L87 Difference]: Start difference. First operand 343 states and 399 transitions. Second operand 60 states. [2020-12-23 06:07:48,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:48,761 INFO L93 Difference]: Finished difference Result 358 states and 416 transitions. [2020-12-23 06:07:48,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-12-23 06:07:48,761 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 230 [2020-12-23 06:07:48,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:48,763 INFO L225 Difference]: With dead ends: 358 [2020-12-23 06:07:48,763 INFO L226 Difference]: Without dead ends: 354 [2020-12-23 06:07:48,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 06:07:48,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-12-23 06:07:48,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 349. [2020-12-23 06:07:48,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349 states. [2020-12-23 06:07:48,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 406 transitions. [2020-12-23 06:07:48,769 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 406 transitions. Word has length 230 [2020-12-23 06:07:48,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:48,770 INFO L481 AbstractCegarLoop]: Abstraction has 349 states and 406 transitions. [2020-12-23 06:07:48,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-12-23 06:07:48,770 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 406 transitions. [2020-12-23 06:07:48,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2020-12-23 06:07:48,771 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:48,771 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:48,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-12-23 06:07:48,986 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:48,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:48,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1088306547, now seen corresponding path program 57 times [2020-12-23 06:07:48,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:48,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319666183] [2020-12-23 06:07:48,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:49,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:51,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:51,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319666183] [2020-12-23 06:07:51,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816204837] [2020-12-23 06:07:51,469 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 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 06:07:51,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2020-12-23 06:07:51,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:51,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 59 conjunts are in the unsatisfiable core [2020-12-23 06:07:51,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:52,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:52,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:52,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 61 [2020-12-23 06:07:52,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610768988] [2020-12-23 06:07:52,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-12-23 06:07:52,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:52,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-12-23 06:07:52,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-12-23 06:07:52,007 INFO L87 Difference]: Start difference. First operand 349 states and 406 transitions. Second operand 61 states. [2020-12-23 06:07:52,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:52,380 INFO L93 Difference]: Finished difference Result 364 states and 423 transitions. [2020-12-23 06:07:52,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-12-23 06:07:52,384 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 234 [2020-12-23 06:07:52,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:52,386 INFO L225 Difference]: With dead ends: 364 [2020-12-23 06:07:52,386 INFO L226 Difference]: Without dead ends: 360 [2020-12-23 06:07:52,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-12-23 06:07:52,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2020-12-23 06:07:52,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 355. [2020-12-23 06:07:52,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2020-12-23 06:07:52,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 413 transitions. [2020-12-23 06:07:52,394 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 413 transitions. Word has length 234 [2020-12-23 06:07:52,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:52,394 INFO L481 AbstractCegarLoop]: Abstraction has 355 states and 413 transitions. [2020-12-23 06:07:52,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-12-23 06:07:52,394 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 413 transitions. [2020-12-23 06:07:52,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2020-12-23 06:07:52,396 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:52,396 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:52,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:52,612 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:52,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:52,612 INFO L82 PathProgramCache]: Analyzing trace with hash -437558718, now seen corresponding path program 58 times [2020-12-23 06:07:52,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:52,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542152176] [2020-12-23 06:07:52,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:52,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:55,083 INFO L134 CoverageAnalysis]: Checked inductivity of 6670 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:55,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542152176] [2020-12-23 06:07:55,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571464673] [2020-12-23 06:07:55,083 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 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 06:07:55,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:07:55,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:55,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 60 conjunts are in the unsatisfiable core [2020-12-23 06:07:55,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:55,560 INFO L134 CoverageAnalysis]: Checked inductivity of 6670 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:55,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:55,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 62 [2020-12-23 06:07:55,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036035744] [2020-12-23 06:07:55,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-12-23 06:07:55,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:55,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-12-23 06:07:55,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2020-12-23 06:07:55,562 INFO L87 Difference]: Start difference. First operand 355 states and 413 transitions. Second operand 62 states. [2020-12-23 06:07:56,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:56,059 INFO L93 Difference]: Finished difference Result 370 states and 430 transitions. [2020-12-23 06:07:56,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-12-23 06:07:56,059 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 238 [2020-12-23 06:07:56,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:56,061 INFO L225 Difference]: With dead ends: 370 [2020-12-23 06:07:56,061 INFO L226 Difference]: Without dead ends: 366 [2020-12-23 06:07:56,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2020-12-23 06:07:56,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2020-12-23 06:07:56,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 361. [2020-12-23 06:07:56,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2020-12-23 06:07:56,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 420 transitions. [2020-12-23 06:07:56,066 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 420 transitions. Word has length 238 [2020-12-23 06:07:56,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:56,067 INFO L481 AbstractCegarLoop]: Abstraction has 361 states and 420 transitions. [2020-12-23 06:07:56,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-12-23 06:07:56,067 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 420 transitions. [2020-12-23 06:07:56,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2020-12-23 06:07:56,068 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:56,068 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:56,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-12-23 06:07:56,283 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:56,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:56,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1126926225, now seen corresponding path program 59 times [2020-12-23 06:07:56,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:56,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922139304] [2020-12-23 06:07:56,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:56,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:58,902 INFO L134 CoverageAnalysis]: Checked inductivity of 6903 backedges. 0 proven. 6903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:58,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922139304] [2020-12-23 06:07:58,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985494086] [2020-12-23 06:07:58,902 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 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 06:07:59,090 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2020-12-23 06:07:59,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:59,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 61 conjunts are in the unsatisfiable core [2020-12-23 06:07:59,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:59,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6903 backedges. 0 proven. 6903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:59,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:59,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 63 [2020-12-23 06:07:59,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909033175] [2020-12-23 06:07:59,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-12-23 06:07:59,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:59,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-12-23 06:07:59,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-12-23 06:07:59,449 INFO L87 Difference]: Start difference. First operand 361 states and 420 transitions. Second operand 63 states. [2020-12-23 06:07:59,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:59,944 INFO L93 Difference]: Finished difference Result 376 states and 437 transitions. [2020-12-23 06:07:59,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-12-23 06:07:59,945 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 242 [2020-12-23 06:07:59,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:59,946 INFO L225 Difference]: With dead ends: 376 [2020-12-23 06:07:59,947 INFO L226 Difference]: Without dead ends: 372 [2020-12-23 06:07:59,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-12-23 06:07:59,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2020-12-23 06:07:59,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 367. [2020-12-23 06:07:59,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367 states. [2020-12-23 06:07:59,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 427 transitions. [2020-12-23 06:07:59,953 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 427 transitions. Word has length 242 [2020-12-23 06:07:59,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:59,954 INFO L481 AbstractCegarLoop]: Abstraction has 367 states and 427 transitions. [2020-12-23 06:07:59,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-12-23 06:07:59,954 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 427 transitions. [2020-12-23 06:07:59,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-12-23 06:07:59,955 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:59,956 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:00,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-12-23 06:08:00,171 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:00,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:00,172 INFO L82 PathProgramCache]: Analyzing trace with hash 237661536, now seen corresponding path program 60 times [2020-12-23 06:08:00,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:00,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583813807] [2020-12-23 06:08:00,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:00,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:02,899 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:02,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583813807] [2020-12-23 06:08:02,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156354344] [2020-12-23 06:08:02,900 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 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 06:08:03,126 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2020-12-23 06:08:03,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:03,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 62 conjunts are in the unsatisfiable core [2020-12-23 06:08:03,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:03,498 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:03,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:03,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 64 [2020-12-23 06:08:03,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474038659] [2020-12-23 06:08:03,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-12-23 06:08:03,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:03,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-12-23 06:08:03,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2020-12-23 06:08:03,500 INFO L87 Difference]: Start difference. First operand 367 states and 427 transitions. Second operand 64 states. [2020-12-23 06:08:04,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:04,069 INFO L93 Difference]: Finished difference Result 382 states and 444 transitions. [2020-12-23 06:08:04,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-12-23 06:08:04,069 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 246 [2020-12-23 06:08:04,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:04,071 INFO L225 Difference]: With dead ends: 382 [2020-12-23 06:08:04,071 INFO L226 Difference]: Without dead ends: 378 [2020-12-23 06:08:04,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2020-12-23 06:08:04,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2020-12-23 06:08:04,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 373. [2020-12-23 06:08:04,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 373 states. [2020-12-23 06:08:04,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 434 transitions. [2020-12-23 06:08:04,077 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 434 transitions. Word has length 246 [2020-12-23 06:08:04,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:04,077 INFO L481 AbstractCegarLoop]: Abstraction has 373 states and 434 transitions. [2020-12-23 06:08:04,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-12-23 06:08:04,077 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 434 transitions. [2020-12-23 06:08:04,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2020-12-23 06:08:04,079 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:04,079 INFO L422 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:04,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:04,294 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:04,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:04,294 INFO L82 PathProgramCache]: Analyzing trace with hash -795618385, now seen corresponding path program 61 times [2020-12-23 06:08:04,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:04,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797575101] [2020-12-23 06:08:04,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:04,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:07,159 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 7381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:07,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797575101] [2020-12-23 06:08:07,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765457734] [2020-12-23 06:08:07,159 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 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 06:08:07,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:07,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 63 conjunts are in the unsatisfiable core [2020-12-23 06:08:07,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:07,687 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 7381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:07,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:07,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 65 [2020-12-23 06:08:07,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259778657] [2020-12-23 06:08:07,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-12-23 06:08:07,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:07,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-12-23 06:08:07,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2020-12-23 06:08:07,689 INFO L87 Difference]: Start difference. First operand 373 states and 434 transitions. Second operand 65 states. [2020-12-23 06:08:08,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:08,109 INFO L93 Difference]: Finished difference Result 388 states and 451 transitions. [2020-12-23 06:08:08,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-12-23 06:08:08,109 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 250 [2020-12-23 06:08:08,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:08,111 INFO L225 Difference]: With dead ends: 388 [2020-12-23 06:08:08,111 INFO L226 Difference]: Without dead ends: 384 [2020-12-23 06:08:08,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2020-12-23 06:08:08,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2020-12-23 06:08:08,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 379. [2020-12-23 06:08:08,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379 states. [2020-12-23 06:08:08,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 441 transitions. [2020-12-23 06:08:08,116 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 441 transitions. Word has length 250 [2020-12-23 06:08:08,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:08,116 INFO L481 AbstractCegarLoop]: Abstraction has 379 states and 441 transitions. [2020-12-23 06:08:08,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-12-23 06:08:08,116 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 441 transitions. [2020-12-23 06:08:08,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2020-12-23 06:08:08,118 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:08,118 INFO L422 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:08,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:08,319 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:08,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:08,319 INFO L82 PathProgramCache]: Analyzing trace with hash -667714946, now seen corresponding path program 62 times [2020-12-23 06:08:08,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:08,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065126844] [2020-12-23 06:08:08,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:08,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:11,232 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:11,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065126844] [2020-12-23 06:08:11,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772191240] [2020-12-23 06:08:11,232 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 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 06:08:11,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:08:11,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:11,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 64 conjunts are in the unsatisfiable core [2020-12-23 06:08:11,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:11,732 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:11,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:11,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2020-12-23 06:08:11,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464839003] [2020-12-23 06:08:11,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-12-23 06:08:11,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:11,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-12-23 06:08:11,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-12-23 06:08:11,734 INFO L87 Difference]: Start difference. First operand 379 states and 441 transitions. Second operand 66 states. [2020-12-23 06:08:12,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:12,332 INFO L93 Difference]: Finished difference Result 394 states and 458 transitions. [2020-12-23 06:08:12,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-12-23 06:08:12,333 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 254 [2020-12-23 06:08:12,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:12,334 INFO L225 Difference]: With dead ends: 394 [2020-12-23 06:08:12,334 INFO L226 Difference]: Without dead ends: 390 [2020-12-23 06:08:12,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-12-23 06:08:12,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-12-23 06:08:12,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 385. [2020-12-23 06:08:12,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 385 states. [2020-12-23 06:08:12,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 448 transitions. [2020-12-23 06:08:12,341 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 448 transitions. Word has length 254 [2020-12-23 06:08:12,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:12,341 INFO L481 AbstractCegarLoop]: Abstraction has 385 states and 448 transitions. [2020-12-23 06:08:12,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-12-23 06:08:12,341 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 448 transitions. [2020-12-23 06:08:12,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2020-12-23 06:08:12,343 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:12,343 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:12,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:12,558 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:12,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:12,559 INFO L82 PathProgramCache]: Analyzing trace with hash 653599181, now seen corresponding path program 63 times [2020-12-23 06:08:12,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:12,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261773848] [2020-12-23 06:08:12,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:12,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:15,559 INFO L134 CoverageAnalysis]: Checked inductivity of 7875 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:15,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261773848] [2020-12-23 06:08:15,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315299930] [2020-12-23 06:08:15,559 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 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 06:08:15,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2020-12-23 06:08:15,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:15,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 65 conjunts are in the unsatisfiable core [2020-12-23 06:08:15,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:16,164 INFO L134 CoverageAnalysis]: Checked inductivity of 7875 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:16,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:16,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 67 [2020-12-23 06:08:16,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882219831] [2020-12-23 06:08:16,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-12-23 06:08:16,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:16,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-12-23 06:08:16,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2020-12-23 06:08:16,167 INFO L87 Difference]: Start difference. First operand 385 states and 448 transitions. Second operand 67 states. [2020-12-23 06:08:16,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:16,598 INFO L93 Difference]: Finished difference Result 400 states and 465 transitions. [2020-12-23 06:08:16,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-12-23 06:08:16,598 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 258 [2020-12-23 06:08:16,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:16,600 INFO L225 Difference]: With dead ends: 400 [2020-12-23 06:08:16,600 INFO L226 Difference]: Without dead ends: 396 [2020-12-23 06:08:16,601 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2020-12-23 06:08:16,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2020-12-23 06:08:16,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 391. [2020-12-23 06:08:16,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 391 states. [2020-12-23 06:08:16,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 455 transitions. [2020-12-23 06:08:16,606 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 455 transitions. Word has length 258 [2020-12-23 06:08:16,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:16,606 INFO L481 AbstractCegarLoop]: Abstraction has 391 states and 455 transitions. [2020-12-23 06:08:16,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-12-23 06:08:16,607 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 455 transitions. [2020-12-23 06:08:16,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2020-12-23 06:08:16,608 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:16,608 INFO L422 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:16,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:16,822 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:16,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:16,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1659144604, now seen corresponding path program 64 times [2020-12-23 06:08:16,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:16,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838255133] [2020-12-23 06:08:16,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:16,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:19,960 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:19,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838255133] [2020-12-23 06:08:19,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827709208] [2020-12-23 06:08:19,961 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 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 06:08:20,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:08:20,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:20,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 66 conjunts are in the unsatisfiable core [2020-12-23 06:08:20,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:20,485 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:20,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:20,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 68 [2020-12-23 06:08:20,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74831641] [2020-12-23 06:08:20,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-12-23 06:08:20,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:20,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-12-23 06:08:20,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2020-12-23 06:08:20,488 INFO L87 Difference]: Start difference. First operand 391 states and 455 transitions. Second operand 68 states. [2020-12-23 06:08:21,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:21,107 INFO L93 Difference]: Finished difference Result 406 states and 472 transitions. [2020-12-23 06:08:21,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-12-23 06:08:21,108 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 262 [2020-12-23 06:08:21,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:21,110 INFO L225 Difference]: With dead ends: 406 [2020-12-23 06:08:21,110 INFO L226 Difference]: Without dead ends: 402 [2020-12-23 06:08:21,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2020-12-23 06:08:21,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2020-12-23 06:08:21,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 397. [2020-12-23 06:08:21,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 397 states. [2020-12-23 06:08:21,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 462 transitions. [2020-12-23 06:08:21,116 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 462 transitions. Word has length 262 [2020-12-23 06:08:21,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:21,116 INFO L481 AbstractCegarLoop]: Abstraction has 397 states and 462 transitions. [2020-12-23 06:08:21,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-12-23 06:08:21,116 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 462 transitions. [2020-12-23 06:08:21,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2020-12-23 06:08:21,118 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:21,118 INFO L422 BasicCegarLoop]: trace histogram [65, 65, 65, 65, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:21,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:21,327 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:21,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:21,327 INFO L82 PathProgramCache]: Analyzing trace with hash -970100245, now seen corresponding path program 65 times [2020-12-23 06:08:21,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:21,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540273583] [2020-12-23 06:08:21,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:21,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:24,564 INFO L134 CoverageAnalysis]: Checked inductivity of 8385 backedges. 0 proven. 8385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:24,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540273583] [2020-12-23 06:08:24,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459785872] [2020-12-23 06:08:24,565 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 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 06:08:24,785 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2020-12-23 06:08:24,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:24,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 67 conjunts are in the unsatisfiable core [2020-12-23 06:08:24,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:25,204 INFO L134 CoverageAnalysis]: Checked inductivity of 8385 backedges. 0 proven. 8385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:25,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:25,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 69 [2020-12-23 06:08:25,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066664038] [2020-12-23 06:08:25,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-12-23 06:08:25,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:25,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-12-23 06:08:25,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-12-23 06:08:25,207 INFO L87 Difference]: Start difference. First operand 397 states and 462 transitions. Second operand 69 states. [2020-12-23 06:08:25,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:25,818 INFO L93 Difference]: Finished difference Result 412 states and 479 transitions. [2020-12-23 06:08:25,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-12-23 06:08:25,819 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 266 [2020-12-23 06:08:25,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:25,821 INFO L225 Difference]: With dead ends: 412 [2020-12-23 06:08:25,821 INFO L226 Difference]: Without dead ends: 408 [2020-12-23 06:08:25,822 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-12-23 06:08:25,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2020-12-23 06:08:25,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 403. [2020-12-23 06:08:25,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2020-12-23 06:08:25,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 469 transitions. [2020-12-23 06:08:25,829 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 469 transitions. Word has length 266 [2020-12-23 06:08:25,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:25,829 INFO L481 AbstractCegarLoop]: Abstraction has 403 states and 469 transitions. [2020-12-23 06:08:25,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-12-23 06:08:25,829 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 469 transitions. [2020-12-23 06:08:25,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2020-12-23 06:08:25,831 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:25,831 INFO L422 BasicCegarLoop]: trace histogram [66, 66, 66, 66, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:26,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-12-23 06:08:26,045 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:26,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:26,046 INFO L82 PathProgramCache]: Analyzing trace with hash 253467322, now seen corresponding path program 66 times [2020-12-23 06:08:26,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:26,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249620335] [2020-12-23 06:08:26,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:26,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:29,401 INFO L134 CoverageAnalysis]: Checked inductivity of 8646 backedges. 0 proven. 8646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:29,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249620335] [2020-12-23 06:08:29,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929219239] [2020-12-23 06:08:29,402 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 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 06:08:29,649 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2020-12-23 06:08:29,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:29,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 68 conjunts are in the unsatisfiable core [2020-12-23 06:08:29,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:30,021 INFO L134 CoverageAnalysis]: Checked inductivity of 8646 backedges. 0 proven. 8646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:30,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:30,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 70 [2020-12-23 06:08:30,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281696252] [2020-12-23 06:08:30,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-12-23 06:08:30,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:30,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-12-23 06:08:30,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2020-12-23 06:08:30,024 INFO L87 Difference]: Start difference. First operand 403 states and 469 transitions. Second operand 70 states. [2020-12-23 06:08:30,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:30,605 INFO L93 Difference]: Finished difference Result 418 states and 486 transitions. [2020-12-23 06:08:30,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-12-23 06:08:30,606 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 270 [2020-12-23 06:08:30,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:30,607 INFO L225 Difference]: With dead ends: 418 [2020-12-23 06:08:30,608 INFO L226 Difference]: Without dead ends: 414 [2020-12-23 06:08:30,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2020-12-23 06:08:30,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2020-12-23 06:08:30,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 409. [2020-12-23 06:08:30,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 409 states. [2020-12-23 06:08:30,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 476 transitions. [2020-12-23 06:08:30,612 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 476 transitions. Word has length 270 [2020-12-23 06:08:30,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:30,612 INFO L481 AbstractCegarLoop]: Abstraction has 409 states and 476 transitions. [2020-12-23 06:08:30,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-12-23 06:08:30,613 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 476 transitions. [2020-12-23 06:08:30,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2020-12-23 06:08:30,614 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:30,614 INFO L422 BasicCegarLoop]: trace histogram [67, 67, 67, 67, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:30,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-12-23 06:08:30,823 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:30,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:30,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1880802313, now seen corresponding path program 67 times [2020-12-23 06:08:30,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:30,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848346911] [2020-12-23 06:08:30,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:30,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:34,302 INFO L134 CoverageAnalysis]: Checked inductivity of 8911 backedges. 0 proven. 8911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:34,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848346911] [2020-12-23 06:08:34,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108459324] [2020-12-23 06:08:34,303 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 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 06:08:34,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:34,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 644 conjuncts, 69 conjunts are in the unsatisfiable core [2020-12-23 06:08:34,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:34,847 INFO L134 CoverageAnalysis]: Checked inductivity of 8911 backedges. 0 proven. 8911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:34,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:34,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 71 [2020-12-23 06:08:34,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894404210] [2020-12-23 06:08:34,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-12-23 06:08:34,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:34,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-12-23 06:08:34,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2020-12-23 06:08:34,849 INFO L87 Difference]: Start difference. First operand 409 states and 476 transitions. Second operand 71 states. [2020-12-23 06:08:35,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:35,481 INFO L93 Difference]: Finished difference Result 424 states and 493 transitions. [2020-12-23 06:08:35,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-12-23 06:08:35,481 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 274 [2020-12-23 06:08:35,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:35,483 INFO L225 Difference]: With dead ends: 424 [2020-12-23 06:08:35,483 INFO L226 Difference]: Without dead ends: 420 [2020-12-23 06:08:35,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2020-12-23 06:08:35,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2020-12-23 06:08:35,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 415. [2020-12-23 06:08:35,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 415 states. [2020-12-23 06:08:35,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 483 transitions. [2020-12-23 06:08:35,490 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 483 transitions. Word has length 274 [2020-12-23 06:08:35,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:35,490 INFO L481 AbstractCegarLoop]: Abstraction has 415 states and 483 transitions. [2020-12-23 06:08:35,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-12-23 06:08:35,490 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 483 transitions. [2020-12-23 06:08:35,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2020-12-23 06:08:35,492 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:35,492 INFO L422 BasicCegarLoop]: trace histogram [68, 68, 68, 68, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:35,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:35,707 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:35,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:35,708 INFO L82 PathProgramCache]: Analyzing trace with hash 2142678488, now seen corresponding path program 68 times [2020-12-23 06:08:35,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:35,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447932810] [2020-12-23 06:08:35,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:35,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:39,290 INFO L134 CoverageAnalysis]: Checked inductivity of 9180 backedges. 0 proven. 9180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:39,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447932810] [2020-12-23 06:08:39,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330072005] [2020-12-23 06:08:39,291 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 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 06:08:39,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:08:39,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:39,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 70 conjunts are in the unsatisfiable core [2020-12-23 06:08:39,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:39,843 INFO L134 CoverageAnalysis]: Checked inductivity of 9180 backedges. 0 proven. 9180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:39,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:39,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 72 [2020-12-23 06:08:39,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649571660] [2020-12-23 06:08:39,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-12-23 06:08:39,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:39,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-12-23 06:08:39,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2020-12-23 06:08:39,845 INFO L87 Difference]: Start difference. First operand 415 states and 483 transitions. Second operand 72 states. [2020-12-23 06:08:40,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:40,505 INFO L93 Difference]: Finished difference Result 430 states and 500 transitions. [2020-12-23 06:08:40,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-12-23 06:08:40,506 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 278 [2020-12-23 06:08:40,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:40,508 INFO L225 Difference]: With dead ends: 430 [2020-12-23 06:08:40,508 INFO L226 Difference]: Without dead ends: 426 [2020-12-23 06:08:40,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2020-12-23 06:08:40,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-12-23 06:08:40,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 421. [2020-12-23 06:08:40,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 421 states. [2020-12-23 06:08:40,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 490 transitions. [2020-12-23 06:08:40,514 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 490 transitions. Word has length 278 [2020-12-23 06:08:40,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:40,514 INFO L481 AbstractCegarLoop]: Abstraction has 421 states and 490 transitions. [2020-12-23 06:08:40,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-12-23 06:08:40,514 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 490 transitions. [2020-12-23 06:08:40,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2020-12-23 06:08:40,515 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:40,515 INFO L422 BasicCegarLoop]: trace histogram [69, 69, 69, 69, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:40,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-12-23 06:08:40,716 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:40,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:40,716 INFO L82 PathProgramCache]: Analyzing trace with hash 681252903, now seen corresponding path program 69 times [2020-12-23 06:08:40,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:40,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413210177] [2020-12-23 06:08:40,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:40,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:44,406 INFO L134 CoverageAnalysis]: Checked inductivity of 9453 backedges. 0 proven. 9453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:44,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413210177] [2020-12-23 06:08:44,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950960572] [2020-12-23 06:08:44,407 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 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 06:08:44,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2020-12-23 06:08:44,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:44,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 71 conjunts are in the unsatisfiable core [2020-12-23 06:08:44,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:45,074 INFO L134 CoverageAnalysis]: Checked inductivity of 9453 backedges. 0 proven. 9453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:45,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:45,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 73 [2020-12-23 06:08:45,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76613112] [2020-12-23 06:08:45,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-12-23 06:08:45,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:45,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-12-23 06:08:45,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2020-12-23 06:08:45,076 INFO L87 Difference]: Start difference. First operand 421 states and 490 transitions. Second operand 73 states. [2020-12-23 06:08:45,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:45,734 INFO L93 Difference]: Finished difference Result 436 states and 507 transitions. [2020-12-23 06:08:45,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-12-23 06:08:45,735 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 282 [2020-12-23 06:08:45,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:45,736 INFO L225 Difference]: With dead ends: 436 [2020-12-23 06:08:45,736 INFO L226 Difference]: Without dead ends: 432 [2020-12-23 06:08:45,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2020-12-23 06:08:45,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2020-12-23 06:08:45,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 427. [2020-12-23 06:08:45,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2020-12-23 06:08:45,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 497 transitions. [2020-12-23 06:08:45,741 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 497 transitions. Word has length 282 [2020-12-23 06:08:45,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:45,741 INFO L481 AbstractCegarLoop]: Abstraction has 427 states and 497 transitions. [2020-12-23 06:08:45,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-12-23 06:08:45,741 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 497 transitions. [2020-12-23 06:08:45,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-12-23 06:08:45,742 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:45,743 INFO L422 BasicCegarLoop]: trace histogram [70, 70, 70, 70, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:45,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-12-23 06:08:45,944 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:45,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:45,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1718369546, now seen corresponding path program 70 times [2020-12-23 06:08:45,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:45,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303819335] [2020-12-23 06:08:45,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:45,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:49,740 INFO L134 CoverageAnalysis]: Checked inductivity of 9730 backedges. 0 proven. 9730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:49,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303819335] [2020-12-23 06:08:49,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183128895] [2020-12-23 06:08:49,740 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 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 06:08:49,906 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:08:49,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:49,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 671 conjuncts, 72 conjunts are in the unsatisfiable core [2020-12-23 06:08:49,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:50,309 INFO L134 CoverageAnalysis]: Checked inductivity of 9730 backedges. 0 proven. 9730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:50,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:50,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 74 [2020-12-23 06:08:50,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282639018] [2020-12-23 06:08:50,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-12-23 06:08:50,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:50,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-12-23 06:08:50,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2020-12-23 06:08:50,311 INFO L87 Difference]: Start difference. First operand 427 states and 497 transitions. Second operand 74 states. [2020-12-23 06:08:51,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:51,025 INFO L93 Difference]: Finished difference Result 442 states and 514 transitions. [2020-12-23 06:08:51,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-12-23 06:08:51,026 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 286 [2020-12-23 06:08:51,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:51,027 INFO L225 Difference]: With dead ends: 442 [2020-12-23 06:08:51,028 INFO L226 Difference]: Without dead ends: 438 [2020-12-23 06:08:51,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2020-12-23 06:08:51,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2020-12-23 06:08:51,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 433. [2020-12-23 06:08:51,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 433 states. [2020-12-23 06:08:51,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 504 transitions. [2020-12-23 06:08:51,033 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 504 transitions. Word has length 286 [2020-12-23 06:08:51,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:51,034 INFO L481 AbstractCegarLoop]: Abstraction has 433 states and 504 transitions. [2020-12-23 06:08:51,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-12-23 06:08:51,034 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 504 transitions. [2020-12-23 06:08:51,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2020-12-23 06:08:51,035 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:51,035 INFO L422 BasicCegarLoop]: trace histogram [71, 71, 71, 71, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:51,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2020-12-23 06:08:51,236 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:51,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:51,237 INFO L82 PathProgramCache]: Analyzing trace with hash 898395717, now seen corresponding path program 71 times [2020-12-23 06:08:51,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:51,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631214493] [2020-12-23 06:08:51,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:51,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:55,152 INFO L134 CoverageAnalysis]: Checked inductivity of 10011 backedges. 0 proven. 10011 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:55,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631214493] [2020-12-23 06:08:55,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417211663] [2020-12-23 06:08:55,153 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 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 06:08:55,381 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2020-12-23 06:08:55,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:55,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 680 conjuncts, 73 conjunts are in the unsatisfiable core [2020-12-23 06:08:55,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:55,787 INFO L134 CoverageAnalysis]: Checked inductivity of 10011 backedges. 0 proven. 10011 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:55,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:55,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 75 [2020-12-23 06:08:55,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609181701] [2020-12-23 06:08:55,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-12-23 06:08:55,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:55,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-12-23 06:08:55,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-12-23 06:08:55,789 INFO L87 Difference]: Start difference. First operand 433 states and 504 transitions. Second operand 75 states. [2020-12-23 06:08:56,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:56,516 INFO L93 Difference]: Finished difference Result 448 states and 521 transitions. [2020-12-23 06:08:56,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-12-23 06:08:56,517 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 290 [2020-12-23 06:08:56,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:56,519 INFO L225 Difference]: With dead ends: 448 [2020-12-23 06:08:56,519 INFO L226 Difference]: Without dead ends: 444 [2020-12-23 06:08:56,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-12-23 06:08:56,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2020-12-23 06:08:56,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 439. [2020-12-23 06:08:56,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 439 states. [2020-12-23 06:08:56,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 511 transitions. [2020-12-23 06:08:56,525 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 511 transitions. Word has length 290 [2020-12-23 06:08:56,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:56,525 INFO L481 AbstractCegarLoop]: Abstraction has 439 states and 511 transitions. [2020-12-23 06:08:56,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-12-23 06:08:56,525 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 511 transitions. [2020-12-23 06:08:56,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2020-12-23 06:08:56,526 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:56,527 INFO L422 BasicCegarLoop]: trace histogram [72, 72, 72, 72, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:56,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:56,729 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:56,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:56,729 INFO L82 PathProgramCache]: Analyzing trace with hash -2087658988, now seen corresponding path program 72 times [2020-12-23 06:08:56,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:56,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774345713] [2020-12-23 06:08:56,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:56,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:00,777 INFO L134 CoverageAnalysis]: Checked inductivity of 10296 backedges. 0 proven. 10296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:00,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774345713] [2020-12-23 06:09:00,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114060669] [2020-12-23 06:09:00,778 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 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 06:09:01,055 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2020-12-23 06:09:01,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:09:01,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 689 conjuncts, 74 conjunts are in the unsatisfiable core [2020-12-23 06:09:01,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:01,460 INFO L134 CoverageAnalysis]: Checked inductivity of 10296 backedges. 0 proven. 10296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:01,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:01,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 76 [2020-12-23 06:09:01,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304452798] [2020-12-23 06:09:01,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-12-23 06:09:01,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:01,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-12-23 06:09:01,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2020-12-23 06:09:01,462 INFO L87 Difference]: Start difference. First operand 439 states and 511 transitions. Second operand 76 states. [2020-12-23 06:09:02,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:02,309 INFO L93 Difference]: Finished difference Result 454 states and 528 transitions. [2020-12-23 06:09:02,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-12-23 06:09:02,315 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 294 [2020-12-23 06:09:02,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:02,317 INFO L225 Difference]: With dead ends: 454 [2020-12-23 06:09:02,317 INFO L226 Difference]: Without dead ends: 450 [2020-12-23 06:09:02,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2020-12-23 06:09:02,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-12-23 06:09:02,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 445. [2020-12-23 06:09:02,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 445 states. [2020-12-23 06:09:02,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 518 transitions. [2020-12-23 06:09:02,325 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 518 transitions. Word has length 294 [2020-12-23 06:09:02,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:02,325 INFO L481 AbstractCegarLoop]: Abstraction has 445 states and 518 transitions. [2020-12-23 06:09:02,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-12-23 06:09:02,325 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 518 transitions. [2020-12-23 06:09:02,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2020-12-23 06:09:02,327 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:02,327 INFO L422 BasicCegarLoop]: trace histogram [73, 73, 73, 73, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:02,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:02,541 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:02,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:02,542 INFO L82 PathProgramCache]: Analyzing trace with hash 516736611, now seen corresponding path program 73 times [2020-12-23 06:09:02,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:02,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198204526] [2020-12-23 06:09:02,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:02,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:06,705 INFO L134 CoverageAnalysis]: Checked inductivity of 10585 backedges. 0 proven. 10585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:06,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198204526] [2020-12-23 06:09:06,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757138655] [2020-12-23 06:09:06,706 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 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 06:09:06,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:06,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 698 conjuncts, 75 conjunts are in the unsatisfiable core [2020-12-23 06:09:06,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:07,295 INFO L134 CoverageAnalysis]: Checked inductivity of 10585 backedges. 0 proven. 10585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:07,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:07,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 77 [2020-12-23 06:09:07,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771133942] [2020-12-23 06:09:07,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-12-23 06:09:07,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:07,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-12-23 06:09:07,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2020-12-23 06:09:07,297 INFO L87 Difference]: Start difference. First operand 445 states and 518 transitions. Second operand 77 states. [2020-12-23 06:09:07,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:07,947 INFO L93 Difference]: Finished difference Result 460 states and 535 transitions. [2020-12-23 06:09:07,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-12-23 06:09:07,948 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 298 [2020-12-23 06:09:07,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:07,949 INFO L225 Difference]: With dead ends: 460 [2020-12-23 06:09:07,950 INFO L226 Difference]: Without dead ends: 456 [2020-12-23 06:09:07,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2020-12-23 06:09:07,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2020-12-23 06:09:07,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 451. [2020-12-23 06:09:07,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 451 states. [2020-12-23 06:09:07,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 525 transitions. [2020-12-23 06:09:07,957 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 525 transitions. Word has length 298 [2020-12-23 06:09:07,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:07,957 INFO L481 AbstractCegarLoop]: Abstraction has 451 states and 525 transitions. [2020-12-23 06:09:07,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-12-23 06:09:07,958 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 525 transitions. [2020-12-23 06:09:07,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2020-12-23 06:09:07,959 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:07,960 INFO L422 BasicCegarLoop]: trace histogram [74, 74, 74, 74, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:08,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:08,174 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:08,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:08,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1500777678, now seen corresponding path program 74 times [2020-12-23 06:09:08,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:08,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887389157] [2020-12-23 06:09:08,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:08,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:12,458 INFO L134 CoverageAnalysis]: Checked inductivity of 10878 backedges. 0 proven. 10878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:12,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887389157] [2020-12-23 06:09:12,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586634272] [2020-12-23 06:09:12,459 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 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 06:09:12,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:09:12,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:09:12,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 76 conjunts are in the unsatisfiable core [2020-12-23 06:09:12,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:13,053 INFO L134 CoverageAnalysis]: Checked inductivity of 10878 backedges. 0 proven. 10878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:13,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:13,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 78 [2020-12-23 06:09:13,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454225332] [2020-12-23 06:09:13,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-12-23 06:09:13,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:13,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-12-23 06:09:13,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-12-23 06:09:13,056 INFO L87 Difference]: Start difference. First operand 451 states and 525 transitions. Second operand 78 states. [2020-12-23 06:09:13,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:13,918 INFO L93 Difference]: Finished difference Result 466 states and 542 transitions. [2020-12-23 06:09:13,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-12-23 06:09:13,920 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 302 [2020-12-23 06:09:13,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:13,922 INFO L225 Difference]: With dead ends: 466 [2020-12-23 06:09:13,922 INFO L226 Difference]: Without dead ends: 462 [2020-12-23 06:09:13,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 302 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 06:09:13,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2020-12-23 06:09:13,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 457. [2020-12-23 06:09:13,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 457 states. [2020-12-23 06:09:13,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 532 transitions. [2020-12-23 06:09:13,928 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 532 transitions. Word has length 302 [2020-12-23 06:09:13,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:13,928 INFO L481 AbstractCegarLoop]: Abstraction has 457 states and 532 transitions. [2020-12-23 06:09:13,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-12-23 06:09:13,928 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 532 transitions. [2020-12-23 06:09:13,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2020-12-23 06:09:13,929 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:13,929 INFO L422 BasicCegarLoop]: trace histogram [75, 75, 75, 75, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:14,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-12-23 06:09:14,130 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:14,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:14,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1371922303, now seen corresponding path program 75 times [2020-12-23 06:09:14,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:14,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889619176] [2020-12-23 06:09:14,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:14,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:18,538 INFO L134 CoverageAnalysis]: Checked inductivity of 11175 backedges. 0 proven. 11175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:18,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889619176] [2020-12-23 06:09:18,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523818018] [2020-12-23 06:09:18,538 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 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 06:09:18,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2020-12-23 06:09:18,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:09:18,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 716 conjuncts, 77 conjunts are in the unsatisfiable core [2020-12-23 06:09:18,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:19,253 INFO L134 CoverageAnalysis]: Checked inductivity of 11175 backedges. 0 proven. 11175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:19,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:19,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 79 [2020-12-23 06:09:19,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923754215] [2020-12-23 06:09:19,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-12-23 06:09:19,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:19,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-12-23 06:09:19,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2020-12-23 06:09:19,256 INFO L87 Difference]: Start difference. First operand 457 states and 532 transitions. Second operand 79 states. [2020-12-23 06:09:20,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:20,040 INFO L93 Difference]: Finished difference Result 472 states and 549 transitions. [2020-12-23 06:09:20,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-12-23 06:09:20,045 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 306 [2020-12-23 06:09:20,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:20,047 INFO L225 Difference]: With dead ends: 472 [2020-12-23 06:09:20,047 INFO L226 Difference]: Without dead ends: 468 [2020-12-23 06:09:20,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2020-12-23 06:09:20,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2020-12-23 06:09:20,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 463. [2020-12-23 06:09:20,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 463 states. [2020-12-23 06:09:20,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 539 transitions. [2020-12-23 06:09:20,054 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 539 transitions. Word has length 306 [2020-12-23 06:09:20,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:20,054 INFO L481 AbstractCegarLoop]: Abstraction has 463 states and 539 transitions. [2020-12-23 06:09:20,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 79 states. [2020-12-23 06:09:20,054 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 539 transitions. [2020-12-23 06:09:20,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2020-12-23 06:09:20,056 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:20,056 INFO L422 BasicCegarLoop]: trace histogram [76, 76, 76, 76, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:20,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:20,257 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:20,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:20,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1386017200, now seen corresponding path program 76 times [2020-12-23 06:09:20,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:20,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623142521] [2020-12-23 06:09:20,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:20,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:24,840 INFO L134 CoverageAnalysis]: Checked inductivity of 11476 backedges. 0 proven. 11476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:24,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623142521] [2020-12-23 06:09:24,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133749472] [2020-12-23 06:09:24,840 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 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 06:09:25,024 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:09:25,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:09:25,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 78 conjunts are in the unsatisfiable core [2020-12-23 06:09:25,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:25,464 INFO L134 CoverageAnalysis]: Checked inductivity of 11476 backedges. 0 proven. 11476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:25,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:25,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 80 [2020-12-23 06:09:25,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915352268] [2020-12-23 06:09:25,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-12-23 06:09:25,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:25,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-12-23 06:09:25,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2020-12-23 06:09:25,466 INFO L87 Difference]: Start difference. First operand 463 states and 539 transitions. Second operand 80 states. [2020-12-23 06:09:26,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:26,196 INFO L93 Difference]: Finished difference Result 478 states and 556 transitions. [2020-12-23 06:09:26,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-12-23 06:09:26,197 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 310 [2020-12-23 06:09:26,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:26,199 INFO L225 Difference]: With dead ends: 478 [2020-12-23 06:09:26,199 INFO L226 Difference]: Without dead ends: 474 [2020-12-23 06:09:26,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2020-12-23 06:09:26,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2020-12-23 06:09:26,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 469. [2020-12-23 06:09:26,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469 states. [2020-12-23 06:09:26,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 546 transitions. [2020-12-23 06:09:26,205 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 546 transitions. Word has length 310 [2020-12-23 06:09:26,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:26,205 INFO L481 AbstractCegarLoop]: Abstraction has 469 states and 546 transitions. [2020-12-23 06:09:26,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-12-23 06:09:26,205 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 546 transitions. [2020-12-23 06:09:26,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2020-12-23 06:09:26,206 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:26,206 INFO L422 BasicCegarLoop]: trace histogram [77, 77, 77, 77, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:26,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:26,415 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:26,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:26,415 INFO L82 PathProgramCache]: Analyzing trace with hash -273515361, now seen corresponding path program 77 times [2020-12-23 06:09:26,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:26,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727994922] [2020-12-23 06:09:26,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:26,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:31,096 INFO L134 CoverageAnalysis]: Checked inductivity of 11781 backedges. 0 proven. 11781 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:31,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727994922] [2020-12-23 06:09:31,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474215223] [2020-12-23 06:09:31,097 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 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 06:09:31,357 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2020-12-23 06:09:31,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:09:31,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 734 conjuncts, 79 conjunts are in the unsatisfiable core [2020-12-23 06:09:31,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:31,759 INFO L134 CoverageAnalysis]: Checked inductivity of 11781 backedges. 0 proven. 11781 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:31,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:31,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 81 [2020-12-23 06:09:31,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742515100] [2020-12-23 06:09:31,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-12-23 06:09:31,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:31,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-12-23 06:09:31,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2020-12-23 06:09:31,762 INFO L87 Difference]: Start difference. First operand 469 states and 546 transitions. Second operand 81 states. [2020-12-23 06:09:32,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:32,732 INFO L93 Difference]: Finished difference Result 484 states and 563 transitions. [2020-12-23 06:09:32,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-12-23 06:09:32,733 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 314 [2020-12-23 06:09:32,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:32,735 INFO L225 Difference]: With dead ends: 484 [2020-12-23 06:09:32,735 INFO L226 Difference]: Without dead ends: 480 [2020-12-23 06:09:32,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2020-12-23 06:09:32,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2020-12-23 06:09:32,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 475. [2020-12-23 06:09:32,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 475 states. [2020-12-23 06:09:32,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 553 transitions. [2020-12-23 06:09:32,741 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 553 transitions. Word has length 314 [2020-12-23 06:09:32,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:32,741 INFO L481 AbstractCegarLoop]: Abstraction has 475 states and 553 transitions. [2020-12-23 06:09:32,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2020-12-23 06:09:32,741 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 553 transitions. [2020-12-23 06:09:32,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-12-23 06:09:32,742 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:32,742 INFO L422 BasicCegarLoop]: trace histogram [78, 78, 78, 78, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:32,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-12-23 06:09:32,943 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:32,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:32,944 INFO L82 PathProgramCache]: Analyzing trace with hash -2064372882, now seen corresponding path program 78 times [2020-12-23 06:09:32,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:32,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789441710] [2020-12-23 06:09:32,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:32,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:37,753 INFO L134 CoverageAnalysis]: Checked inductivity of 12090 backedges. 0 proven. 12090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:37,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789441710] [2020-12-23 06:09:37,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590474200] [2020-12-23 06:09:37,754 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:38,061 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2020-12-23 06:09:38,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:09:38,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 743 conjuncts, 80 conjunts are in the unsatisfiable core [2020-12-23 06:09:38,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:38,513 INFO L134 CoverageAnalysis]: Checked inductivity of 12090 backedges. 0 proven. 12090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:38,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:38,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 82 [2020-12-23 06:09:38,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200332603] [2020-12-23 06:09:38,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-12-23 06:09:38,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:38,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-12-23 06:09:38,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2020-12-23 06:09:38,515 INFO L87 Difference]: Start difference. First operand 475 states and 553 transitions. Second operand 82 states. [2020-12-23 06:09:39,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:39,635 INFO L93 Difference]: Finished difference Result 490 states and 570 transitions. [2020-12-23 06:09:39,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-12-23 06:09:39,636 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 318 [2020-12-23 06:09:39,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:39,638 INFO L225 Difference]: With dead ends: 490 [2020-12-23 06:09:39,638 INFO L226 Difference]: Without dead ends: 486 [2020-12-23 06:09:39,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2020-12-23 06:09:39,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2020-12-23 06:09:39,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 481. [2020-12-23 06:09:39,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 481 states. [2020-12-23 06:09:39,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 560 transitions. [2020-12-23 06:09:39,643 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 560 transitions. Word has length 318 [2020-12-23 06:09:39,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:39,643 INFO L481 AbstractCegarLoop]: Abstraction has 481 states and 560 transitions. [2020-12-23 06:09:39,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-12-23 06:09:39,644 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 560 transitions. [2020-12-23 06:09:39,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-12-23 06:09:39,645 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:39,645 INFO L422 BasicCegarLoop]: trace histogram [79, 79, 79, 79, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:39,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-12-23 06:09:39,846 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:39,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:39,846 INFO L82 PathProgramCache]: Analyzing trace with hash 823384765, now seen corresponding path program 79 times [2020-12-23 06:09:39,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:39,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958149990] [2020-12-23 06:09:39,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:39,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:44,833 INFO L134 CoverageAnalysis]: Checked inductivity of 12403 backedges. 0 proven. 12403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:44,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958149990] [2020-12-23 06:09:44,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436864973] [2020-12-23 06:09:44,833 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:45,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:45,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 81 conjunts are in the unsatisfiable core [2020-12-23 06:09:45,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:45,480 INFO L134 CoverageAnalysis]: Checked inductivity of 12403 backedges. 0 proven. 12403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:45,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:45,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 83 [2020-12-23 06:09:45,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662565047] [2020-12-23 06:09:45,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 83 states [2020-12-23 06:09:45,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:45,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2020-12-23 06:09:45,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2020-12-23 06:09:45,482 INFO L87 Difference]: Start difference. First operand 481 states and 560 transitions. Second operand 83 states. [2020-12-23 06:09:46,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:46,390 INFO L93 Difference]: Finished difference Result 496 states and 577 transitions. [2020-12-23 06:09:46,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-12-23 06:09:46,390 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 322 [2020-12-23 06:09:46,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:46,392 INFO L225 Difference]: With dead ends: 496 [2020-12-23 06:09:46,392 INFO L226 Difference]: Without dead ends: 492 [2020-12-23 06:09:46,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2020-12-23 06:09:46,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2020-12-23 06:09:46,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 487. [2020-12-23 06:09:46,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 487 states. [2020-12-23 06:09:46,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 567 transitions. [2020-12-23 06:09:46,399 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 567 transitions. Word has length 322 [2020-12-23 06:09:46,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:46,400 INFO L481 AbstractCegarLoop]: Abstraction has 487 states and 567 transitions. [2020-12-23 06:09:46,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 83 states. [2020-12-23 06:09:46,400 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 567 transitions. [2020-12-23 06:09:46,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-12-23 06:09:46,402 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:46,402 INFO L422 BasicCegarLoop]: trace histogram [80, 80, 80, 80, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:46,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:46,610 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:46,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:46,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1545423500, now seen corresponding path program 80 times [2020-12-23 06:09:46,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:46,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961905259] [2020-12-23 06:09:46,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:46,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:51,726 INFO L134 CoverageAnalysis]: Checked inductivity of 12720 backedges. 0 proven. 12720 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:51,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961905259] [2020-12-23 06:09:51,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861108452] [2020-12-23 06:09:51,727 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:51,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:09:51,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:09:51,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 82 conjunts are in the unsatisfiable core [2020-12-23 06:09:51,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:52,381 INFO L134 CoverageAnalysis]: Checked inductivity of 12720 backedges. 0 proven. 12720 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:52,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:52,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 84 [2020-12-23 06:09:52,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225170123] [2020-12-23 06:09:52,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-12-23 06:09:52,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:52,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-12-23 06:09:52,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2020-12-23 06:09:52,386 INFO L87 Difference]: Start difference. First operand 487 states and 567 transitions. Second operand 84 states. [2020-12-23 06:09:53,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:53,620 INFO L93 Difference]: Finished difference Result 502 states and 584 transitions. [2020-12-23 06:09:53,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-12-23 06:09:53,621 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 326 [2020-12-23 06:09:53,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:53,623 INFO L225 Difference]: With dead ends: 502 [2020-12-23 06:09:53,623 INFO L226 Difference]: Without dead ends: 498 [2020-12-23 06:09:53,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2020-12-23 06:09:53,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2020-12-23 06:09:53,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 493. [2020-12-23 06:09:53,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 493 states. [2020-12-23 06:09:53,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 574 transitions. [2020-12-23 06:09:53,628 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 574 transitions. Word has length 326 [2020-12-23 06:09:53,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:53,629 INFO L481 AbstractCegarLoop]: Abstraction has 493 states and 574 transitions. [2020-12-23 06:09:53,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-12-23 06:09:53,629 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 574 transitions. [2020-12-23 06:09:53,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-12-23 06:09:53,630 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:53,630 INFO L422 BasicCegarLoop]: trace histogram [81, 81, 81, 81, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:53,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:53,839 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:53,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:53,840 INFO L82 PathProgramCache]: Analyzing trace with hash 37501659, now seen corresponding path program 81 times [2020-12-23 06:09:53,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:53,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688127531] [2020-12-23 06:09:53,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:53,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:59,119 INFO L134 CoverageAnalysis]: Checked inductivity of 13041 backedges. 0 proven. 13041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:59,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688127531] [2020-12-23 06:09:59,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047405754] [2020-12-23 06:09:59,120 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:59,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2020-12-23 06:09:59,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:09:59,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 770 conjuncts, 83 conjunts are in the unsatisfiable core [2020-12-23 06:09:59,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:59,903 INFO L134 CoverageAnalysis]: Checked inductivity of 13041 backedges. 0 proven. 13041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:59,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:59,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 85 [2020-12-23 06:09:59,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050235803] [2020-12-23 06:09:59,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 85 states [2020-12-23 06:09:59,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:59,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2020-12-23 06:09:59,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2020-12-23 06:09:59,906 INFO L87 Difference]: Start difference. First operand 493 states and 574 transitions. Second operand 85 states. [2020-12-23 06:10:01,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:10:01,057 INFO L93 Difference]: Finished difference Result 508 states and 591 transitions. [2020-12-23 06:10:01,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-12-23 06:10:01,058 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 330 [2020-12-23 06:10:01,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:10:01,060 INFO L225 Difference]: With dead ends: 508 [2020-12-23 06:10:01,060 INFO L226 Difference]: Without dead ends: 504 [2020-12-23 06:10:01,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2020-12-23 06:10:01,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2020-12-23 06:10:01,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 499. [2020-12-23 06:10:01,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 499 states. [2020-12-23 06:10:01,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 581 transitions. [2020-12-23 06:10:01,066 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 581 transitions. Word has length 330 [2020-12-23 06:10:01,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:10:01,067 INFO L481 AbstractCegarLoop]: Abstraction has 499 states and 581 transitions. [2020-12-23 06:10:01,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 85 states. [2020-12-23 06:10:01,067 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 581 transitions. [2020-12-23 06:10:01,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-12-23 06:10:01,068 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:10:01,069 INFO L422 BasicCegarLoop]: trace histogram [82, 82, 82, 82, 1, 1, 1, 1, 1, 1] [2020-12-23 06:10:01,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:10:01,269 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:10:01,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:10:01,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1547932758, now seen corresponding path program 82 times [2020-12-23 06:10:01,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:10:01,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998525744] [2020-12-23 06:10:01,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:10:01,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:10:06,741 INFO L134 CoverageAnalysis]: Checked inductivity of 13366 backedges. 0 proven. 13366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:06,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998525744] [2020-12-23 06:10:06,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436219057] [2020-12-23 06:10:06,741 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:10:06,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:10:06,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:10:06,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 84 conjunts are in the unsatisfiable core [2020-12-23 06:10:06,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:10:07,402 INFO L134 CoverageAnalysis]: Checked inductivity of 13366 backedges. 0 proven. 13366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:07,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:10:07,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 86 [2020-12-23 06:10:07,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401442182] [2020-12-23 06:10:07,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-12-23 06:10:07,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:10:07,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-12-23 06:10:07,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2020-12-23 06:10:07,404 INFO L87 Difference]: Start difference. First operand 499 states and 581 transitions. Second operand 86 states. [2020-12-23 06:10:08,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:10:08,385 INFO L93 Difference]: Finished difference Result 514 states and 598 transitions. [2020-12-23 06:10:08,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-12-23 06:10:08,386 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 334 [2020-12-23 06:10:08,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:10:08,388 INFO L225 Difference]: With dead ends: 514 [2020-12-23 06:10:08,388 INFO L226 Difference]: Without dead ends: 510 [2020-12-23 06:10:08,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2020-12-23 06:10:08,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2020-12-23 06:10:08,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 505. [2020-12-23 06:10:08,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 505 states. [2020-12-23 06:10:08,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 588 transitions. [2020-12-23 06:10:08,394 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 588 transitions. Word has length 334 [2020-12-23 06:10:08,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:10:08,394 INFO L481 AbstractCegarLoop]: Abstraction has 505 states and 588 transitions. [2020-12-23 06:10:08,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-12-23 06:10:08,394 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 588 transitions. [2020-12-23 06:10:08,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-12-23 06:10:08,395 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:10:08,395 INFO L422 BasicCegarLoop]: trace histogram [83, 83, 83, 83, 1, 1, 1, 1, 1, 1] [2020-12-23 06:10:08,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:10:08,596 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:10:08,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:10:08,597 INFO L82 PathProgramCache]: Analyzing trace with hash 889822457, now seen corresponding path program 83 times [2020-12-23 06:10:08,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:10:08,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908017719] [2020-12-23 06:10:08,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:10:08,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:10:14,147 INFO L134 CoverageAnalysis]: Checked inductivity of 13695 backedges. 0 proven. 13695 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:14,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908017719] [2020-12-23 06:10:14,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411362222] [2020-12-23 06:10:14,148 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:10:14,429 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2020-12-23 06:10:14,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:10:14,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 788 conjuncts, 85 conjunts are in the unsatisfiable core [2020-12-23 06:10:14,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:10:14,923 INFO L134 CoverageAnalysis]: Checked inductivity of 13695 backedges. 0 proven. 13695 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:14,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:10:14,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 87 [2020-12-23 06:10:14,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313252185] [2020-12-23 06:10:14,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 87 states [2020-12-23 06:10:14,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:10:14,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2020-12-23 06:10:14,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2020-12-23 06:10:14,925 INFO L87 Difference]: Start difference. First operand 505 states and 588 transitions. Second operand 87 states. [2020-12-23 06:10:15,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:10:15,877 INFO L93 Difference]: Finished difference Result 520 states and 605 transitions. [2020-12-23 06:10:15,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2020-12-23 06:10:15,878 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 338 [2020-12-23 06:10:15,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:10:15,881 INFO L225 Difference]: With dead ends: 520 [2020-12-23 06:10:15,881 INFO L226 Difference]: Without dead ends: 516 [2020-12-23 06:10:15,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2020-12-23 06:10:15,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2020-12-23 06:10:15,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 511. [2020-12-23 06:10:15,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2020-12-23 06:10:15,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 595 transitions. [2020-12-23 06:10:15,887 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 595 transitions. Word has length 338 [2020-12-23 06:10:15,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:10:15,887 INFO L481 AbstractCegarLoop]: Abstraction has 511 states and 595 transitions. [2020-12-23 06:10:15,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 87 states. [2020-12-23 06:10:15,887 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 595 transitions. [2020-12-23 06:10:15,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-12-23 06:10:15,889 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:10:15,889 INFO L422 BasicCegarLoop]: trace histogram [84, 84, 84, 84, 1, 1, 1, 1, 1, 1] [2020-12-23 06:10:16,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:10:16,090 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:10:16,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:10:16,090 INFO L82 PathProgramCache]: Analyzing trace with hash 246386376, now seen corresponding path program 84 times [2020-12-23 06:10:16,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:10:16,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270912878] [2020-12-23 06:10:16,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:10:16,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:10:21,866 INFO L134 CoverageAnalysis]: Checked inductivity of 14028 backedges. 0 proven. 14028 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:21,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270912878] [2020-12-23 06:10:21,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507263293] [2020-12-23 06:10:21,867 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:10:22,216 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2020-12-23 06:10:22,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:10:22,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 86 conjunts are in the unsatisfiable core [2020-12-23 06:10:22,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:10:22,670 INFO L134 CoverageAnalysis]: Checked inductivity of 14028 backedges. 0 proven. 14028 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:22,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:10:22,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 88 [2020-12-23 06:10:22,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744653486] [2020-12-23 06:10:22,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-12-23 06:10:22,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:10:22,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-12-23 06:10:22,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2020-12-23 06:10:22,672 INFO L87 Difference]: Start difference. First operand 511 states and 595 transitions. Second operand 88 states. [2020-12-23 06:10:23,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:10:23,630 INFO L93 Difference]: Finished difference Result 526 states and 612 transitions. [2020-12-23 06:10:23,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-12-23 06:10:23,630 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 342 [2020-12-23 06:10:23,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:10:23,632 INFO L225 Difference]: With dead ends: 526 [2020-12-23 06:10:23,633 INFO L226 Difference]: Without dead ends: 522 [2020-12-23 06:10:23,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2020-12-23 06:10:23,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2020-12-23 06:10:23,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 517. [2020-12-23 06:10:23,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 517 states. [2020-12-23 06:10:23,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 602 transitions. [2020-12-23 06:10:23,639 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 602 transitions. Word has length 342 [2020-12-23 06:10:23,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:10:23,640 INFO L481 AbstractCegarLoop]: Abstraction has 517 states and 602 transitions. [2020-12-23 06:10:23,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-12-23 06:10:23,640 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 602 transitions. [2020-12-23 06:10:23,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2020-12-23 06:10:23,642 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:10:23,642 INFO L422 BasicCegarLoop]: trace histogram [85, 85, 85, 85, 1, 1, 1, 1, 1, 1]