/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/loops-crafted-1/nested5-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 07:10:14,178 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 07:10:14,181 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 07:10:14,217 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 07:10:14,218 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 07:10:14,219 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 07:10:14,221 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 07:10:14,224 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 07:10:14,226 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 07:10:14,228 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 07:10:14,229 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 07:10:14,231 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 07:10:14,232 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 07:10:14,233 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 07:10:14,234 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 07:10:14,236 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 07:10:14,237 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 07:10:14,239 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 07:10:14,259 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 07:10:14,267 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 07:10:14,271 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 07:10:14,273 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 07:10:14,275 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 07:10:14,277 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 07:10:14,285 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 07:10:14,294 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 07:10:14,295 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 07:10:14,296 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 07:10:14,297 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 07:10:14,299 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 07:10:14,299 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 07:10:14,300 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 07:10:14,300 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 07:10:14,301 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 07:10:14,302 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 07:10:14,309 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 07:10:14,310 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 07:10:14,338 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 07:10:14,338 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 07:10:14,340 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 07:10:14,340 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 07:10:14,340 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 07:10:14,340 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 07:10:14,341 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 07:10:14,341 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 07:10:14,341 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 07:10:14,341 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 07:10:14,341 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 07:10:14,342 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 07:10:14,342 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 07:10:14,342 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 07:10:14,342 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 07:10:14,342 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 07:10:14,343 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 07:10:14,343 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 07:10:14,343 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 07:10:14,343 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 07:10:14,343 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 07:10:14,344 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 07:10:14,344 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 07:10:14,344 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 07:10:14,344 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 07:10:14,344 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 07:10:14,718 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 07:10:14,749 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 07:10:14,752 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 07:10:14,754 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 07:10:14,755 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 07:10:14,756 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/nested5-2.c [2020-12-23 07:10:14,850 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/848208d79/43e9bc25dfbb43dfbee056e8d88c9bd1/FLAG8891f2899 [2020-12-23 07:10:15,566 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 07:10:15,567 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/nested5-2.c [2020-12-23 07:10:15,577 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/848208d79/43e9bc25dfbb43dfbee056e8d88c9bd1/FLAG8891f2899 [2020-12-23 07:10:15,915 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/848208d79/43e9bc25dfbb43dfbee056e8d88c9bd1 [2020-12-23 07:10:15,918 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 07:10:15,921 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 07:10:15,925 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 07:10:15,925 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 07:10:15,929 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 07:10:15,931 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:10:15" (1/1) ... [2020-12-23 07:10:15,933 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38ac1164 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:10:15, skipping insertion in model container [2020-12-23 07:10:15,933 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:10:15" (1/1) ... [2020-12-23 07:10:15,942 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 07:10:15,959 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 07:10:16,166 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/nested5-2.c[321,334] left hand side expression in assignment: lhs: VariableLHS[~w~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~z~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] [2020-12-23 07:10:16,196 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:10:16,212 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 07:10:16,227 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/nested5-2.c[321,334] left hand side expression in assignment: lhs: VariableLHS[~w~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~z~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] [2020-12-23 07:10:16,253 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:10:16,277 INFO L208 MainTranslator]: Completed translation [2020-12-23 07:10:16,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:10:16 WrapperNode [2020-12-23 07:10:16,278 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 07:10:16,279 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 07:10:16,280 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 07:10:16,280 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 07:10:16,291 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:10:16" (1/1) ... [2020-12-23 07:10:16,303 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:10:16" (1/1) ... [2020-12-23 07:10:16,336 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 07:10:16,340 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 07:10:16,341 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 07:10:16,342 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 07:10:16,354 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:10:16" (1/1) ... [2020-12-23 07:10:16,354 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:10:16" (1/1) ... [2020-12-23 07:10:16,369 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:10:16" (1/1) ... [2020-12-23 07:10:16,370 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:10:16" (1/1) ... [2020-12-23 07:10:16,375 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:10:16" (1/1) ... [2020-12-23 07:10:16,383 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:10:16" (1/1) ... [2020-12-23 07:10:16,391 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:10:16" (1/1) ... [2020-12-23 07:10:16,399 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 07:10:16,402 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 07:10:16,402 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 07:10:16,403 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 07:10:16,405 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:10:16" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 07:10:16,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 07:10:16,534 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 07:10:16,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 07:10:16,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 07:10:17,018 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 07:10:17,018 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-23 07:10:17,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:10:17 BoogieIcfgContainer [2020-12-23 07:10:17,020 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 07:10:17,069 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 07:10:17,069 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 07:10:17,073 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 07:10:17,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 07:10:15" (1/3) ... [2020-12-23 07:10:17,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fc6f19e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:10:17, skipping insertion in model container [2020-12-23 07:10:17,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:10:16" (2/3) ... [2020-12-23 07:10:17,076 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fc6f19e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:10:17, skipping insertion in model container [2020-12-23 07:10:17,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:10:17" (3/3) ... [2020-12-23 07:10:17,078 INFO L111 eAbstractionObserver]: Analyzing ICFG nested5-2.c [2020-12-23 07:10:17,094 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 07:10:17,105 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 07:10:17,150 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 07:10:17,178 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 07:10:17,178 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 07:10:17,178 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 07:10:17,179 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 07:10:17,179 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 07:10:17,179 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 07:10:17,179 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 07:10:17,179 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 07:10:17,195 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-12-23 07:10:17,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 07:10:17,201 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:17,202 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:17,202 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:17,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:17,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1296464707, now seen corresponding path program 1 times [2020-12-23 07:10:17,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:17,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537556299] [2020-12-23 07:10:17,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:17,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:17,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:10:17,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537556299] [2020-12-23 07:10:17,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:10:17,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 07:10:17,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79253961] [2020-12-23 07:10:17,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 07:10:17,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:17,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 07:10:17,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 07:10:17,534 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2020-12-23 07:10:17,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:17,577 INFO L93 Difference]: Finished difference Result 51 states and 80 transitions. [2020-12-23 07:10:17,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 07:10:17,579 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-12-23 07:10:17,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:17,589 INFO L225 Difference]: With dead ends: 51 [2020-12-23 07:10:17,590 INFO L226 Difference]: Without dead ends: 25 [2020-12-23 07:10:17,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 07:10:17,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-23 07:10:17,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 17. [2020-12-23 07:10:17,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-23 07:10:17,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2020-12-23 07:10:17,631 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2020-12-23 07:10:17,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:17,631 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2020-12-23 07:10:17,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 07:10:17,632 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2020-12-23 07:10:17,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 07:10:17,633 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:17,633 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:17,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 07:10:17,633 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:17,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:17,634 INFO L82 PathProgramCache]: Analyzing trace with hash -308834241, now seen corresponding path program 1 times [2020-12-23 07:10:17,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:17,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906620203] [2020-12-23 07:10:17,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:17,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:17,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:10:17,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906620203] [2020-12-23 07:10:17,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147806436] [2020-12-23 07:10:17,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:17,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:17,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 07:10:17,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:17,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:10:17,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:17,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 07:10:17,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461421172] [2020-12-23 07:10:17,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 07:10:17,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:17,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 07:10:17,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:10:17,906 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 5 states. [2020-12-23 07:10:17,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:17,944 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2020-12-23 07:10:17,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 07:10:17,945 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-12-23 07:10:17,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:17,946 INFO L225 Difference]: With dead ends: 42 [2020-12-23 07:10:17,946 INFO L226 Difference]: Without dead ends: 27 [2020-12-23 07:10:17,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:10:17,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-23 07:10:17,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2020-12-23 07:10:17,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-23 07:10:17,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2020-12-23 07:10:17,953 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2020-12-23 07:10:17,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:17,956 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2020-12-23 07:10:17,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 07:10:17,957 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2020-12-23 07:10:17,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 07:10:17,957 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:17,958 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:18,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 07:10:18,172 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:18,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:18,174 INFO L82 PathProgramCache]: Analyzing trace with hash -383728831, now seen corresponding path program 2 times [2020-12-23 07:10:18,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:18,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787167720] [2020-12-23 07:10:18,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:18,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:18,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:10:18,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787167720] [2020-12-23 07:10:18,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932683001] [2020-12-23 07:10:18,279 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 07:10:18,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:10:18,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:18,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 07:10:18,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:18,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:10:18,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:18,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 07:10:18,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470561928] [2020-12-23 07:10:18,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:10:18,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:18,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:10:18,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:10:18,417 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 6 states. [2020-12-23 07:10:18,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:18,471 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2020-12-23 07:10:18,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 07:10:18,472 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-12-23 07:10:18,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:18,473 INFO L225 Difference]: With dead ends: 46 [2020-12-23 07:10:18,473 INFO L226 Difference]: Without dead ends: 29 [2020-12-23 07:10:18,474 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:10:18,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-23 07:10:18,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 21. [2020-12-23 07:10:18,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-23 07:10:18,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-12-23 07:10:18,480 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2020-12-23 07:10:18,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:18,480 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-12-23 07:10:18,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:10:18,480 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-12-23 07:10:18,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 07:10:18,481 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:18,481 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:18,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:18,696 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:18,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:18,698 INFO L82 PathProgramCache]: Analyzing trace with hash 657014211, now seen corresponding path program 3 times [2020-12-23 07:10:18,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:18,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552679827] [2020-12-23 07:10:18,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:18,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:18,813 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:10:18,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552679827] [2020-12-23 07:10:18,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550868186] [2020-12-23 07:10:18,814 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 07:10:18,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 07:10:18,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:18,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 07:10:18,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:18,941 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:10:18,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:18,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 07:10:18,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028434383] [2020-12-23 07:10:18,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 07:10:18,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:18,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 07:10:18,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:10:18,945 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 7 states. [2020-12-23 07:10:19,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:19,007 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2020-12-23 07:10:19,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 07:10:19,008 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-12-23 07:10:19,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:19,009 INFO L225 Difference]: With dead ends: 50 [2020-12-23 07:10:19,009 INFO L226 Difference]: Without dead ends: 31 [2020-12-23 07:10:19,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:10:19,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-23 07:10:19,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2020-12-23 07:10:19,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-23 07:10:19,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-12-23 07:10:19,016 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 16 [2020-12-23 07:10:19,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:19,016 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-12-23 07:10:19,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 07:10:19,016 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-12-23 07:10:19,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 07:10:19,017 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:19,017 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:19,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:19,247 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:19,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:19,248 INFO L82 PathProgramCache]: Analyzing trace with hash 83697605, now seen corresponding path program 4 times [2020-12-23 07:10:19,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:19,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034857450] [2020-12-23 07:10:19,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:19,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:19,495 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:10:19,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034857450] [2020-12-23 07:10:19,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246537972] [2020-12-23 07:10:19,496 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 07:10:19,602 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:10:19,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:19,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 07:10:19,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:19,692 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:10:19,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:19,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-23 07:10:19,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203084055] [2020-12-23 07:10:19,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 07:10:19,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:19,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 07:10:19,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:10:19,696 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 8 states. [2020-12-23 07:10:19,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:19,784 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2020-12-23 07:10:19,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 07:10:19,784 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-12-23 07:10:19,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:19,785 INFO L225 Difference]: With dead ends: 54 [2020-12-23 07:10:19,786 INFO L226 Difference]: Without dead ends: 33 [2020-12-23 07:10:19,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:10:19,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-23 07:10:19,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2020-12-23 07:10:19,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-23 07:10:19,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-12-23 07:10:19,792 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 18 [2020-12-23 07:10:19,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:19,792 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-12-23 07:10:19,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 07:10:19,792 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-12-23 07:10:19,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 07:10:19,793 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:19,793 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:20,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:20,008 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:20,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:20,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1117746873, now seen corresponding path program 5 times [2020-12-23 07:10:20,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:20,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295240302] [2020-12-23 07:10:20,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:20,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:20,211 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:10:20,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295240302] [2020-12-23 07:10:20,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392205821] [2020-12-23 07:10:20,213 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 07:10:20,282 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 07:10:20,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:20,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 07:10:20,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:20,416 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:10:20,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:20,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-23 07:10:20,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522472518] [2020-12-23 07:10:20,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 07:10:20,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:20,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 07:10:20,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:10:20,425 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 9 states. [2020-12-23 07:10:20,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:20,535 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2020-12-23 07:10:20,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 07:10:20,536 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-12-23 07:10:20,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:20,537 INFO L225 Difference]: With dead ends: 58 [2020-12-23 07:10:20,537 INFO L226 Difference]: Without dead ends: 35 [2020-12-23 07:10:20,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:10:20,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-23 07:10:20,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 27. [2020-12-23 07:10:20,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 07:10:20,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-12-23 07:10:20,543 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 20 [2020-12-23 07:10:20,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:20,543 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-12-23 07:10:20,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 07:10:20,543 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-12-23 07:10:20,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 07:10:20,544 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:20,544 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:20,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 07:10:20,758 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:20,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:20,759 INFO L82 PathProgramCache]: Analyzing trace with hash -359687607, now seen corresponding path program 6 times [2020-12-23 07:10:20,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:20,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25992140] [2020-12-23 07:10:20,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:20,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:20,903 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:10:20,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25992140] [2020-12-23 07:10:20,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392869102] [2020-12-23 07:10:20,904 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 07:10:21,009 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 07:10:21,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:21,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 07:10:21,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:21,089 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:10:21,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:21,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 07:10:21,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650920522] [2020-12-23 07:10:21,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 07:10:21,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:21,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 07:10:21,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:10:21,092 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 10 states. [2020-12-23 07:10:21,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:21,217 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2020-12-23 07:10:21,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 07:10:21,218 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2020-12-23 07:10:21,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:21,219 INFO L225 Difference]: With dead ends: 62 [2020-12-23 07:10:21,219 INFO L226 Difference]: Without dead ends: 37 [2020-12-23 07:10:21,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:10:21,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-23 07:10:21,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2020-12-23 07:10:21,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-23 07:10:21,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-12-23 07:10:21,252 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 22 [2020-12-23 07:10:21,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:21,252 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-12-23 07:10:21,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 07:10:21,252 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-12-23 07:10:21,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 07:10:21,253 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:21,253 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:21,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:21,459 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:21,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:21,460 INFO L82 PathProgramCache]: Analyzing trace with hash -2009173301, now seen corresponding path program 7 times [2020-12-23 07:10:21,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:21,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505616988] [2020-12-23 07:10:21,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:21,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:21,624 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:10:21,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505616988] [2020-12-23 07:10:21,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896739631] [2020-12-23 07:10:21,626 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 07:10:21,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:21,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 07:10:21,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:21,789 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:10:21,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:21,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 07:10:21,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822953955] [2020-12-23 07:10:21,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 07:10:21,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:21,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 07:10:21,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-23 07:10:21,793 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 11 states. [2020-12-23 07:10:21,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:21,922 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2020-12-23 07:10:21,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 07:10:21,924 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2020-12-23 07:10:21,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:21,925 INFO L225 Difference]: With dead ends: 66 [2020-12-23 07:10:21,926 INFO L226 Difference]: Without dead ends: 39 [2020-12-23 07:10:21,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-23 07:10:21,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-23 07:10:21,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2020-12-23 07:10:21,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 07:10:21,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-12-23 07:10:21,944 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 24 [2020-12-23 07:10:21,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:21,944 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-12-23 07:10:21,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 07:10:21,944 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-12-23 07:10:21,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 07:10:21,945 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:21,945 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:22,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:22,146 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:22,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:22,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1972974285, now seen corresponding path program 8 times [2020-12-23 07:10:22,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:22,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42743717] [2020-12-23 07:10:22,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:22,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:22,342 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:10:22,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42743717] [2020-12-23 07:10:22,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209498264] [2020-12-23 07:10:22,343 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 07:10:22,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:10:22,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:22,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 07:10:22,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:22,479 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:10:22,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:22,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 07:10:22,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95159153] [2020-12-23 07:10:22,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 07:10:22,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:22,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 07:10:22,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:10:22,482 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 12 states. [2020-12-23 07:10:22,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:22,619 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2020-12-23 07:10:22,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 07:10:22,620 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 26 [2020-12-23 07:10:22,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:22,621 INFO L225 Difference]: With dead ends: 70 [2020-12-23 07:10:22,621 INFO L226 Difference]: Without dead ends: 41 [2020-12-23 07:10:22,621 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:10:22,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-23 07:10:22,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2020-12-23 07:10:22,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 07:10:22,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-12-23 07:10:22,626 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 26 [2020-12-23 07:10:22,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:22,626 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-12-23 07:10:22,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 07:10:22,627 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-12-23 07:10:22,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 07:10:22,628 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:22,628 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:22,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 07:10:22,842 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:22,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:22,843 INFO L82 PathProgramCache]: Analyzing trace with hash 2000943695, now seen corresponding path program 9 times [2020-12-23 07:10:22,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:22,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407742171] [2020-12-23 07:10:22,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:22,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:23,061 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:10:23,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407742171] [2020-12-23 07:10:23,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992282007] [2020-12-23 07:10:23,062 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 07:10:23,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-23 07:10:23,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:23,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 07:10:23,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:23,256 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:10:23,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:23,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 07:10:23,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590568088] [2020-12-23 07:10:23,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 07:10:23,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:23,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 07:10:23,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:10:23,259 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 13 states. [2020-12-23 07:10:23,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:23,418 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2020-12-23 07:10:23,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 07:10:23,419 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2020-12-23 07:10:23,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:23,420 INFO L225 Difference]: With dead ends: 74 [2020-12-23 07:10:23,420 INFO L226 Difference]: Without dead ends: 43 [2020-12-23 07:10:23,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:10:23,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-23 07:10:23,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2020-12-23 07:10:23,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-23 07:10:23,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-12-23 07:10:23,425 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 28 [2020-12-23 07:10:23,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:23,426 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-12-23 07:10:23,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 07:10:23,426 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-12-23 07:10:23,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 07:10:23,427 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:23,427 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:23,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:23,634 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:23,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:23,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1185224367, now seen corresponding path program 10 times [2020-12-23 07:10:23,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:23,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092215513] [2020-12-23 07:10:23,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:23,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:23,824 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:10:23,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092215513] [2020-12-23 07:10:23,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539186377] [2020-12-23 07:10:23,825 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:23,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:10:23,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:23,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 07:10:23,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:23,957 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:10:23,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:23,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-23 07:10:23,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523924259] [2020-12-23 07:10:23,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 07:10:23,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:23,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 07:10:23,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-12-23 07:10:23,959 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 14 states. [2020-12-23 07:10:24,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:24,160 INFO L93 Difference]: Finished difference Result 78 states and 90 transitions. [2020-12-23 07:10:24,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 07:10:24,161 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 30 [2020-12-23 07:10:24,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:24,162 INFO L225 Difference]: With dead ends: 78 [2020-12-23 07:10:24,162 INFO L226 Difference]: Without dead ends: 45 [2020-12-23 07:10:24,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-12-23 07:10:24,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-23 07:10:24,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2020-12-23 07:10:24,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-23 07:10:24,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-12-23 07:10:24,181 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 30 [2020-12-23 07:10:24,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:24,181 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-12-23 07:10:24,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 07:10:24,182 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-12-23 07:10:24,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 07:10:24,182 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:24,183 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:24,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:24,398 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:24,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:24,399 INFO L82 PathProgramCache]: Analyzing trace with hash -781049901, now seen corresponding path program 11 times [2020-12-23 07:10:24,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:24,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723713688] [2020-12-23 07:10:24,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:24,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:24,607 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:10:24,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723713688] [2020-12-23 07:10:24,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62477114] [2020-12-23 07:10:24,608 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 07:10:24,793 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-23 07:10:24,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:24,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 07:10:24,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:24,951 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:10:24,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:24,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-23 07:10:24,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140876311] [2020-12-23 07:10:24,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 07:10:24,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:24,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 07:10:24,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-12-23 07:10:24,954 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 15 states. [2020-12-23 07:10:25,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:25,171 INFO L93 Difference]: Finished difference Result 82 states and 94 transitions. [2020-12-23 07:10:25,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 07:10:25,171 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 32 [2020-12-23 07:10:25,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:25,172 INFO L225 Difference]: With dead ends: 82 [2020-12-23 07:10:25,172 INFO L226 Difference]: Without dead ends: 47 [2020-12-23 07:10:25,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 9 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-12-23 07:10:25,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-23 07:10:25,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 39. [2020-12-23 07:10:25,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-23 07:10:25,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-12-23 07:10:25,177 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 32 [2020-12-23 07:10:25,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:25,178 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-12-23 07:10:25,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 07:10:25,178 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-12-23 07:10:25,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 07:10:25,179 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:25,179 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:25,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 07:10:25,393 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:25,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:25,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1083555285, now seen corresponding path program 12 times [2020-12-23 07:10:25,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:25,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760489015] [2020-12-23 07:10:25,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:25,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:25,619 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:10:25,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760489015] [2020-12-23 07:10:25,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139277602] [2020-12-23 07:10:25,620 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 07:10:25,857 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-23 07:10:25,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:25,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-23 07:10:25,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:26,007 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:10:26,034 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:10:26,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:26,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 17 [2020-12-23 07:10:26,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667890497] [2020-12-23 07:10:26,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 07:10:26,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:26,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 07:10:26,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-23 07:10:26,037 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 17 states. [2020-12-23 07:10:26,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:26,285 INFO L93 Difference]: Finished difference Result 86 states and 98 transitions. [2020-12-23 07:10:26,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 07:10:26,286 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 34 [2020-12-23 07:10:26,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:26,286 INFO L225 Difference]: With dead ends: 86 [2020-12-23 07:10:26,286 INFO L226 Difference]: Without dead ends: 49 [2020-12-23 07:10:26,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-23 07:10:26,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-23 07:10:26,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2020-12-23 07:10:26,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-23 07:10:26,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-12-23 07:10:26,292 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 34 [2020-12-23 07:10:26,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:26,292 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-12-23 07:10:26,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 07:10:26,293 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-12-23 07:10:26,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-23 07:10:26,293 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:26,293 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:26,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 07:10:26,498 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:26,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:26,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1967776599, now seen corresponding path program 13 times [2020-12-23 07:10:26,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:26,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32526686] [2020-12-23 07:10:26,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:26,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:26,759 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:10:26,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32526686] [2020-12-23 07:10:26,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095185242] [2020-12-23 07:10:26,760 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 07:10:26,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:26,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 07:10:26,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:26,899 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:10:26,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:26,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-23 07:10:26,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597517639] [2020-12-23 07:10:26,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 07:10:26,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:26,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 07:10:26,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-23 07:10:26,901 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 17 states. [2020-12-23 07:10:27,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:27,190 INFO L93 Difference]: Finished difference Result 90 states and 102 transitions. [2020-12-23 07:10:27,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 07:10:27,191 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 36 [2020-12-23 07:10:27,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:27,192 INFO L225 Difference]: With dead ends: 90 [2020-12-23 07:10:27,192 INFO L226 Difference]: Without dead ends: 51 [2020-12-23 07:10:27,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-23 07:10:27,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-23 07:10:27,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2020-12-23 07:10:27,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-23 07:10:27,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-12-23 07:10:27,197 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 36 [2020-12-23 07:10:27,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:27,198 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-12-23 07:10:27,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 07:10:27,198 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-12-23 07:10:27,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 07:10:27,199 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:27,199 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:27,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 07:10:27,414 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:27,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:27,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1300934745, now seen corresponding path program 14 times [2020-12-23 07:10:27,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:27,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925943285] [2020-12-23 07:10:27,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:27,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:27,672 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:10:27,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925943285] [2020-12-23 07:10:27,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858223527] [2020-12-23 07:10:27,672 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 07:10:27,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:10:27,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:27,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 07:10:27,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:27,828 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:10:27,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:27,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-23 07:10:27,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274192981] [2020-12-23 07:10:27,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 07:10:27,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:27,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 07:10:27,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-12-23 07:10:27,831 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 18 states. [2020-12-23 07:10:28,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:28,193 INFO L93 Difference]: Finished difference Result 94 states and 106 transitions. [2020-12-23 07:10:28,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 07:10:28,194 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 38 [2020-12-23 07:10:28,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:28,195 INFO L225 Difference]: With dead ends: 94 [2020-12-23 07:10:28,195 INFO L226 Difference]: Without dead ends: 53 [2020-12-23 07:10:28,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-12-23 07:10:28,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-23 07:10:28,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 45. [2020-12-23 07:10:28,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-23 07:10:28,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-12-23 07:10:28,200 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 38 [2020-12-23 07:10:28,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:28,200 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-12-23 07:10:28,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 07:10:28,201 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-12-23 07:10:28,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 07:10:28,201 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:28,201 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:28,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:28,415 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:28,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:28,416 INFO L82 PathProgramCache]: Analyzing trace with hash 416040155, now seen corresponding path program 15 times [2020-12-23 07:10:28,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:28,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364002802] [2020-12-23 07:10:28,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:28,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:28,712 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:10:28,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364002802] [2020-12-23 07:10:28,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638164907] [2020-12-23 07:10:28,713 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 07:10:28,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-23 07:10:28,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:28,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-23 07:10:28,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:29,211 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:10:29,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:29,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-23 07:10:29,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995552077] [2020-12-23 07:10:29,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 07:10:29,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:29,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 07:10:29,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-12-23 07:10:29,215 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 19 states. [2020-12-23 07:10:29,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:29,627 INFO L93 Difference]: Finished difference Result 98 states and 110 transitions. [2020-12-23 07:10:29,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 07:10:29,627 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 40 [2020-12-23 07:10:29,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:29,629 INFO L225 Difference]: With dead ends: 98 [2020-12-23 07:10:29,629 INFO L226 Difference]: Without dead ends: 55 [2020-12-23 07:10:29,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 34 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-12-23 07:10:29,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-23 07:10:29,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 47. [2020-12-23 07:10:29,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-23 07:10:29,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-12-23 07:10:29,634 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 40 [2020-12-23 07:10:29,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:29,634 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-12-23 07:10:29,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 07:10:29,634 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-12-23 07:10:29,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-23 07:10:29,635 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:29,635 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:29,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 07:10:29,839 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:29,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:29,840 INFO L82 PathProgramCache]: Analyzing trace with hash 435863773, now seen corresponding path program 16 times [2020-12-23 07:10:29,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:29,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113026840] [2020-12-23 07:10:29,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:29,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:30,181 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:10:30,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113026840] [2020-12-23 07:10:30,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492217027] [2020-12-23 07:10:30,182 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 07:10:30,239 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:10:30,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:30,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 07:10:30,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:30,329 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:10:30,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:30,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-23 07:10:30,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522262602] [2020-12-23 07:10:30,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 07:10:30,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:30,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 07:10:30,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-12-23 07:10:30,331 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 20 states. [2020-12-23 07:10:30,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:30,768 INFO L93 Difference]: Finished difference Result 102 states and 114 transitions. [2020-12-23 07:10:30,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 07:10:30,768 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 42 [2020-12-23 07:10:30,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:30,769 INFO L225 Difference]: With dead ends: 102 [2020-12-23 07:10:30,769 INFO L226 Difference]: Without dead ends: 57 [2020-12-23 07:10:30,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-12-23 07:10:30,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-23 07:10:30,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 49. [2020-12-23 07:10:30,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-23 07:10:30,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-12-23 07:10:30,774 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 42 [2020-12-23 07:10:30,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:30,775 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-12-23 07:10:30,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 07:10:30,775 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-12-23 07:10:30,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-23 07:10:30,775 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:30,776 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:30,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 07:10:30,988 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:30,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:30,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1988475809, now seen corresponding path program 17 times [2020-12-23 07:10:30,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:30,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797703369] [2020-12-23 07:10:30,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:31,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:31,319 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:10:31,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797703369] [2020-12-23 07:10:31,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418195043] [2020-12-23 07:10:31,320 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 07:10:31,723 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-23 07:10:31,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:31,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-23 07:10:31,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:32,058 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:10:32,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:32,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-23 07:10:32,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621602433] [2020-12-23 07:10:32,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 07:10:32,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:32,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 07:10:32,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-12-23 07:10:32,060 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 21 states. [2020-12-23 07:10:32,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:32,557 INFO L93 Difference]: Finished difference Result 106 states and 118 transitions. [2020-12-23 07:10:32,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 07:10:32,558 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 44 [2020-12-23 07:10:32,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:32,559 INFO L225 Difference]: With dead ends: 106 [2020-12-23 07:10:32,559 INFO L226 Difference]: Without dead ends: 59 [2020-12-23 07:10:32,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 29 SyntacticMatches, 16 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-12-23 07:10:32,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-23 07:10:32,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2020-12-23 07:10:32,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-23 07:10:32,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-12-23 07:10:32,565 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 44 [2020-12-23 07:10:32,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:32,566 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-12-23 07:10:32,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 07:10:32,566 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-12-23 07:10:32,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 07:10:32,567 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:32,567 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:32,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 07:10:32,776 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:32,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:32,777 INFO L82 PathProgramCache]: Analyzing trace with hash 388427617, now seen corresponding path program 18 times [2020-12-23 07:10:32,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:32,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561066776] [2020-12-23 07:10:32,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:32,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:33,159 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:10:33,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561066776] [2020-12-23 07:10:33,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343852976] [2020-12-23 07:10:33,160 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 07:10:33,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-23 07:10:33,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:33,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-23 07:10:33,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:33,927 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:10:33,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:33,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-23 07:10:33,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392485165] [2020-12-23 07:10:33,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 07:10:33,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:33,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 07:10:33,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-12-23 07:10:33,932 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 22 states. [2020-12-23 07:10:34,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:34,461 INFO L93 Difference]: Finished difference Result 110 states and 122 transitions. [2020-12-23 07:10:34,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 07:10:34,462 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 46 [2020-12-23 07:10:34,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:34,463 INFO L225 Difference]: With dead ends: 110 [2020-12-23 07:10:34,463 INFO L226 Difference]: Without dead ends: 61 [2020-12-23 07:10:34,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 39 SyntacticMatches, 8 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-12-23 07:10:34,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-23 07:10:34,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2020-12-23 07:10:34,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-23 07:10:34,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2020-12-23 07:10:34,467 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 46 [2020-12-23 07:10:34,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:34,467 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2020-12-23 07:10:34,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 07:10:34,467 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2020-12-23 07:10:34,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-23 07:10:34,468 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:34,468 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:34,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:34,674 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:34,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:34,675 INFO L82 PathProgramCache]: Analyzing trace with hash -329981469, now seen corresponding path program 19 times [2020-12-23 07:10:34,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:34,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182744662] [2020-12-23 07:10:34,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:34,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:35,122 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:10:35,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182744662] [2020-12-23 07:10:35,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442621988] [2020-12-23 07:10:35,122 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 07:10:35,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:35,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-23 07:10:35,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:35,298 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:10:35,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:35,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-23 07:10:35,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672172959] [2020-12-23 07:10:35,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 07:10:35,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:35,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 07:10:35,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-12-23 07:10:35,301 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 23 states. [2020-12-23 07:10:35,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:35,834 INFO L93 Difference]: Finished difference Result 114 states and 126 transitions. [2020-12-23 07:10:35,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 07:10:35,834 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 48 [2020-12-23 07:10:35,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:35,835 INFO L225 Difference]: With dead ends: 114 [2020-12-23 07:10:35,835 INFO L226 Difference]: Without dead ends: 63 [2020-12-23 07:10:35,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-12-23 07:10:35,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-23 07:10:35,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 55. [2020-12-23 07:10:35,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-23 07:10:35,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2020-12-23 07:10:35,840 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 48 [2020-12-23 07:10:35,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:35,840 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2020-12-23 07:10:35,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 07:10:35,840 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2020-12-23 07:10:35,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-23 07:10:35,841 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:35,841 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:36,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:36,055 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:36,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:36,055 INFO L82 PathProgramCache]: Analyzing trace with hash 768621541, now seen corresponding path program 20 times [2020-12-23 07:10:36,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:36,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189500700] [2020-12-23 07:10:36,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:36,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:36,510 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:10:36,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189500700] [2020-12-23 07:10:36,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760531566] [2020-12-23 07:10:36,511 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 07:10:36,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:10:36,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:36,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-23 07:10:36,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:36,694 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:10:36,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:36,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-23 07:10:36,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481396434] [2020-12-23 07:10:36,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 07:10:36,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:36,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 07:10:36,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-12-23 07:10:36,699 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand 24 states. [2020-12-23 07:10:37,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:37,345 INFO L93 Difference]: Finished difference Result 118 states and 130 transitions. [2020-12-23 07:10:37,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 07:10:37,345 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 50 [2020-12-23 07:10:37,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:37,346 INFO L225 Difference]: With dead ends: 118 [2020-12-23 07:10:37,346 INFO L226 Difference]: Without dead ends: 65 [2020-12-23 07:10:37,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-12-23 07:10:37,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-23 07:10:37,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 57. [2020-12-23 07:10:37,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-23 07:10:37,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2020-12-23 07:10:37,351 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 50 [2020-12-23 07:10:37,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:37,352 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2020-12-23 07:10:37,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 07:10:37,352 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2020-12-23 07:10:37,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-23 07:10:37,352 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:37,352 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:37,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-23 07:10:37,559 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:37,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:37,560 INFO L82 PathProgramCache]: Analyzing trace with hash -35840665, now seen corresponding path program 21 times [2020-12-23 07:10:37,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:37,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056653104] [2020-12-23 07:10:37,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:37,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:38,059 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:10:38,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056653104] [2020-12-23 07:10:38,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666902555] [2020-12-23 07:10:38,060 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 07:10:38,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-12-23 07:10:38,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:38,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-23 07:10:38,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:38,931 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:10:38,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:38,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-23 07:10:38,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294817180] [2020-12-23 07:10:38,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 07:10:38,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:38,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 07:10:38,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-12-23 07:10:38,933 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 25 states. [2020-12-23 07:10:39,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:39,643 INFO L93 Difference]: Finished difference Result 122 states and 134 transitions. [2020-12-23 07:10:39,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 07:10:39,647 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 52 [2020-12-23 07:10:39,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:39,647 INFO L225 Difference]: With dead ends: 122 [2020-12-23 07:10:39,647 INFO L226 Difference]: Without dead ends: 67 [2020-12-23 07:10:39,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 44 SyntacticMatches, 9 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-12-23 07:10:39,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-23 07:10:39,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2020-12-23 07:10:39,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-23 07:10:39,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2020-12-23 07:10:39,652 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 52 [2020-12-23 07:10:39,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:39,652 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2020-12-23 07:10:39,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 07:10:39,652 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2020-12-23 07:10:39,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-23 07:10:39,653 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:39,653 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:39,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 07:10:39,857 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:39,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:39,858 INFO L82 PathProgramCache]: Analyzing trace with hash -29907351, now seen corresponding path program 22 times [2020-12-23 07:10:39,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:39,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281508972] [2020-12-23 07:10:39,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:39,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:40,396 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:10:40,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281508972] [2020-12-23 07:10:40,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917797057] [2020-12-23 07:10:40,397 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 07:10:40,445 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:10:40,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:40,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-23 07:10:40,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:40,592 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:10:40,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:40,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-23 07:10:40,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235267542] [2020-12-23 07:10:40,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 07:10:40,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:40,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 07:10:40,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-12-23 07:10:40,595 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 26 states. [2020-12-23 07:10:41,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:41,374 INFO L93 Difference]: Finished difference Result 126 states and 138 transitions. [2020-12-23 07:10:41,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 07:10:41,375 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 54 [2020-12-23 07:10:41,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:41,376 INFO L225 Difference]: With dead ends: 126 [2020-12-23 07:10:41,376 INFO L226 Difference]: Without dead ends: 69 [2020-12-23 07:10:41,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-12-23 07:10:41,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-23 07:10:41,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 61. [2020-12-23 07:10:41,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-23 07:10:41,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2020-12-23 07:10:41,382 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 54 [2020-12-23 07:10:41,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:41,382 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2020-12-23 07:10:41,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 07:10:41,382 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2020-12-23 07:10:41,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-23 07:10:41,383 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:41,383 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:41,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:41,598 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:41,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:41,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1377040107, now seen corresponding path program 23 times [2020-12-23 07:10:41,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:41,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040698167] [2020-12-23 07:10:41,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:41,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:42,184 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:10:42,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040698167] [2020-12-23 07:10:42,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492216898] [2020-12-23 07:10:42,185 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 07:10:45,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-12-23 07:10:45,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:45,459 WARN L261 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 71 conjunts are in the unsatisfiable core [2020-12-23 07:10:45,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:46,051 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:10:46,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:46,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-23 07:10:46,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466946326] [2020-12-23 07:10:46,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 07:10:46,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:46,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 07:10:46,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-12-23 07:10:46,054 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 27 states. [2020-12-23 07:10:46,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:46,959 INFO L93 Difference]: Finished difference Result 130 states and 142 transitions. [2020-12-23 07:10:46,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 07:10:46,960 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 56 [2020-12-23 07:10:46,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:46,960 INFO L225 Difference]: With dead ends: 130 [2020-12-23 07:10:46,960 INFO L226 Difference]: Without dead ends: 71 [2020-12-23 07:10:46,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 34 SyntacticMatches, 23 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-12-23 07:10:46,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-23 07:10:46,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 63. [2020-12-23 07:10:46,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-23 07:10:46,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2020-12-23 07:10:46,965 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 56 [2020-12-23 07:10:46,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:46,965 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2020-12-23 07:10:46,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 07:10:46,965 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2020-12-23 07:10:46,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-23 07:10:46,966 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:46,966 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:47,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 07:10:47,171 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:47,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:47,172 INFO L82 PathProgramCache]: Analyzing trace with hash 538849005, now seen corresponding path program 24 times [2020-12-23 07:10:47,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:47,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718250545] [2020-12-23 07:10:47,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:47,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:47,746 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:10:47,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718250545] [2020-12-23 07:10:47,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193570190] [2020-12-23 07:10:47,746 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 07:10:49,633 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-12-23 07:10:49,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:49,637 WARN L261 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 71 conjunts are in the unsatisfiable core [2020-12-23 07:10:49,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:50,072 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:10:50,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:50,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-23 07:10:50,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397923586] [2020-12-23 07:10:50,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 07:10:50,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:50,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 07:10:50,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-12-23 07:10:50,075 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand 28 states. [2020-12-23 07:10:51,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:51,008 INFO L93 Difference]: Finished difference Result 134 states and 146 transitions. [2020-12-23 07:10:51,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 07:10:51,009 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 58 [2020-12-23 07:10:51,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:51,009 INFO L225 Difference]: With dead ends: 134 [2020-12-23 07:10:51,009 INFO L226 Difference]: Without dead ends: 73 [2020-12-23 07:10:51,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 16 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-12-23 07:10:51,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-23 07:10:51,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 65. [2020-12-23 07:10:51,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-23 07:10:51,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2020-12-23 07:10:51,013 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 58 [2020-12-23 07:10:51,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:51,014 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2020-12-23 07:10:51,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 07:10:51,014 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2020-12-23 07:10:51,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-23 07:10:51,014 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:51,014 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:51,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:51,218 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:51,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:51,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1803915665, now seen corresponding path program 25 times [2020-12-23 07:10:51,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:51,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824477057] [2020-12-23 07:10:51,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:51,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:51,901 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:10:51,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824477057] [2020-12-23 07:10:51,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103587135] [2020-12-23 07:10:51,902 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 07:10:51,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:51,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-23 07:10:51,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:52,079 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:10:52,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:52,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-23 07:10:52,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605595721] [2020-12-23 07:10:52,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 07:10:52,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:52,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 07:10:52,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-12-23 07:10:52,082 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand 29 states. [2020-12-23 07:10:53,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:53,092 INFO L93 Difference]: Finished difference Result 138 states and 150 transitions. [2020-12-23 07:10:53,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 07:10:53,094 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 60 [2020-12-23 07:10:53,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:53,095 INFO L225 Difference]: With dead ends: 138 [2020-12-23 07:10:53,095 INFO L226 Difference]: Without dead ends: 75 [2020-12-23 07:10:53,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-12-23 07:10:53,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-23 07:10:53,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 67. [2020-12-23 07:10:53,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-23 07:10:53,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2020-12-23 07:10:53,100 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 60 [2020-12-23 07:10:53,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:53,100 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2020-12-23 07:10:53,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 07:10:53,100 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2020-12-23 07:10:53,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-23 07:10:53,101 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:53,101 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:53,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 07:10:53,310 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:53,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:53,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1657066865, now seen corresponding path program 26 times [2020-12-23 07:10:53,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:53,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163207449] [2020-12-23 07:10:53,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:53,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:53,991 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:10:53,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163207449] [2020-12-23 07:10:53,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552941216] [2020-12-23 07:10:53,992 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 07:10:54,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:10:54,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:54,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 55 conjunts are in the unsatisfiable core [2020-12-23 07:10:54,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:54,199 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:10:54,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:54,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-23 07:10:54,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696059220] [2020-12-23 07:10:54,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 07:10:54,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:54,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 07:10:54,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2020-12-23 07:10:54,201 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand 30 states. [2020-12-23 07:10:55,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:55,277 INFO L93 Difference]: Finished difference Result 142 states and 154 transitions. [2020-12-23 07:10:55,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 07:10:55,281 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 62 [2020-12-23 07:10:55,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:55,282 INFO L225 Difference]: With dead ends: 142 [2020-12-23 07:10:55,282 INFO L226 Difference]: Without dead ends: 77 [2020-12-23 07:10:55,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2020-12-23 07:10:55,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-23 07:10:55,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 69. [2020-12-23 07:10:55,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-23 07:10:55,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2020-12-23 07:10:55,286 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 62 [2020-12-23 07:10:55,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:55,286 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2020-12-23 07:10:55,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 07:10:55,286 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2020-12-23 07:10:55,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-23 07:10:55,287 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:55,287 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:55,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 07:10:55,501 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:55,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:55,502 INFO L82 PathProgramCache]: Analyzing trace with hash -938376205, now seen corresponding path program 27 times [2020-12-23 07:10:55,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:55,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982043855] [2020-12-23 07:10:55,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:55,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:56,190 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:10:56,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982043855] [2020-12-23 07:10:56,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253794006] [2020-12-23 07:10:56,191 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 07:10:57,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2020-12-23 07:10:57,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:57,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 61 conjunts are in the unsatisfiable core [2020-12-23 07:10:57,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:57,400 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:10:57,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:57,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-12-23 07:10:57,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481799171] [2020-12-23 07:10:57,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 07:10:57,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:57,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 07:10:57,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-12-23 07:10:57,402 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand 31 states. [2020-12-23 07:10:58,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:58,557 INFO L93 Difference]: Finished difference Result 146 states and 158 transitions. [2020-12-23 07:10:58,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 07:10:58,557 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 64 [2020-12-23 07:10:58,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:58,558 INFO L225 Difference]: With dead ends: 146 [2020-12-23 07:10:58,559 INFO L226 Difference]: Without dead ends: 79 [2020-12-23 07:10:58,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-12-23 07:10:58,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-12-23 07:10:58,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 71. [2020-12-23 07:10:58,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-23 07:10:58,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2020-12-23 07:10:58,563 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 64 [2020-12-23 07:10:58,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:58,563 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2020-12-23 07:10:58,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 07:10:58,563 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2020-12-23 07:10:58,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-23 07:10:58,564 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:58,564 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:58,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 07:10:58,768 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:58,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:58,769 INFO L82 PathProgramCache]: Analyzing trace with hash 216832501, now seen corresponding path program 28 times [2020-12-23 07:10:58,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:58,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830407696] [2020-12-23 07:10:58,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:58,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:59,528 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:10:59,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830407696] [2020-12-23 07:10:59,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96460661] [2020-12-23 07:10:59,528 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 07:10:59,581 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:10:59,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:59,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 59 conjunts are in the unsatisfiable core [2020-12-23 07:10:59,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:59,734 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:10:59,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:59,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-12-23 07:10:59,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261600228] [2020-12-23 07:10:59,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 07:10:59,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:59,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 07:10:59,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2020-12-23 07:10:59,736 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 32 states. [2020-12-23 07:11:00,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:11:00,956 INFO L93 Difference]: Finished difference Result 150 states and 162 transitions. [2020-12-23 07:11:00,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 07:11:00,959 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 66 [2020-12-23 07:11:00,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:11:00,960 INFO L225 Difference]: With dead ends: 150 [2020-12-23 07:11:00,960 INFO L226 Difference]: Without dead ends: 81 [2020-12-23 07:11:00,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2020-12-23 07:11:00,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-23 07:11:00,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 73. [2020-12-23 07:11:00,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-23 07:11:00,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2020-12-23 07:11:00,968 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 66 [2020-12-23 07:11:00,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:11:00,968 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2020-12-23 07:11:00,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 07:11:00,968 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2020-12-23 07:11:00,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-23 07:11:00,969 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:11:00,969 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:11:01,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 07:11:01,184 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:11:01,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:11:01,185 INFO L82 PathProgramCache]: Analyzing trace with hash -2024130697, now seen corresponding path program 29 times [2020-12-23 07:11:01,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:11:01,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311173787] [2020-12-23 07:11:01,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:11:01,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:11:02,054 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:11:02,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311173787] [2020-12-23 07:11:02,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905470735] [2020-12-23 07:11:02,055 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 07:11:09,985 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2020-12-23 07:11:09,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:11:09,991 WARN L261 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 84 conjunts are in the unsatisfiable core [2020-12-23 07:11:09,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:11:10,818 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:11:10,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:11:10,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-12-23 07:11:10,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576147641] [2020-12-23 07:11:10,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 07:11:10,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:11:10,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 07:11:10,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 07:11:10,820 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 33 states. [2020-12-23 07:11:12,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:11:12,177 INFO L93 Difference]: Finished difference Result 154 states and 166 transitions. [2020-12-23 07:11:12,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 07:11:12,178 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 68 [2020-12-23 07:11:12,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:11:12,179 INFO L225 Difference]: With dead ends: 154 [2020-12-23 07:11:12,179 INFO L226 Difference]: Without dead ends: 83 [2020-12-23 07:11:12,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 45 SyntacticMatches, 24 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 07:11:12,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-23 07:11:12,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 75. [2020-12-23 07:11:12,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-23 07:11:12,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2020-12-23 07:11:12,183 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 68 [2020-12-23 07:11:12,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:11:12,183 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2020-12-23 07:11:12,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 07:11:12,183 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2020-12-23 07:11:12,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-23 07:11:12,184 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:11:12,184 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:11:12,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:11:12,388 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:11:12,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:11:12,389 INFO L82 PathProgramCache]: Analyzing trace with hash 483818617, now seen corresponding path program 30 times [2020-12-23 07:11:12,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:11:12,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160708052] [2020-12-23 07:11:12,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:11:12,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:11:13,266 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:11:13,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160708052] [2020-12-23 07:11:13,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728142171] [2020-12-23 07:11:13,266 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 07:11:15,205 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2020-12-23 07:11:15,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:11:15,209 WARN L261 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 80 conjunts are in the unsatisfiable core [2020-12-23 07:11:15,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:11:15,751 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:11:15,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:11:15,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-12-23 07:11:15,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159176911] [2020-12-23 07:11:15,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 07:11:15,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:11:15,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 07:11:15,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 07:11:15,753 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand 34 states. [2020-12-23 07:11:17,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:11:17,159 INFO L93 Difference]: Finished difference Result 158 states and 170 transitions. [2020-12-23 07:11:17,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-23 07:11:17,160 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 70 [2020-12-23 07:11:17,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:11:17,160 INFO L225 Difference]: With dead ends: 158 [2020-12-23 07:11:17,160 INFO L226 Difference]: Without dead ends: 85 [2020-12-23 07:11:17,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 58 SyntacticMatches, 13 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 07:11:17,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-12-23 07:11:17,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 77. [2020-12-23 07:11:17,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-12-23 07:11:17,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2020-12-23 07:11:17,166 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 70 [2020-12-23 07:11:17,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:11:17,166 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2020-12-23 07:11:17,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 07:11:17,166 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2020-12-23 07:11:17,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-23 07:11:17,167 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:11:17,167 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:11:17,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:11:17,371 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:11:17,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:11:17,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1146456315, now seen corresponding path program 31 times [2020-12-23 07:11:17,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:11:17,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611126945] [2020-12-23 07:11:17,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:11:17,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:11:18,343 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:11:18,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611126945] [2020-12-23 07:11:18,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428963323] [2020-12-23 07:11:18,344 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 07:11:18,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:11:18,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 65 conjunts are in the unsatisfiable core [2020-12-23 07:11:18,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:11:18,553 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:11:18,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:11:18,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-12-23 07:11:18,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66027332] [2020-12-23 07:11:18,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-23 07:11:18,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:11:18,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-23 07:11:18,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 07:11:18,556 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand 35 states. [2020-12-23 07:11:20,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:11:20,047 INFO L93 Difference]: Finished difference Result 162 states and 174 transitions. [2020-12-23 07:11:20,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 07:11:20,047 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 72 [2020-12-23 07:11:20,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:11:20,048 INFO L225 Difference]: With dead ends: 162 [2020-12-23 07:11:20,048 INFO L226 Difference]: Without dead ends: 87 [2020-12-23 07:11:20,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 07:11:20,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-12-23 07:11:20,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 79. [2020-12-23 07:11:20,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-23 07:11:20,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2020-12-23 07:11:20,052 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 72 [2020-12-23 07:11:20,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:11:20,053 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2020-12-23 07:11:20,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-23 07:11:20,053 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2020-12-23 07:11:20,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-23 07:11:20,054 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:11:20,054 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:11:20,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:11:20,257 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:11:20,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:11:20,258 INFO L82 PathProgramCache]: Analyzing trace with hash -2008843011, now seen corresponding path program 32 times [2020-12-23 07:11:20,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:11:20,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940596635] [2020-12-23 07:11:20,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:11:20,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:11:21,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:11:21,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940596635] [2020-12-23 07:11:21,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580367966] [2020-12-23 07:11:21,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:11:21,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:11:21,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:11:21,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 67 conjunts are in the unsatisfiable core [2020-12-23 07:11:21,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:11:21,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:11:21,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:11:21,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-12-23 07:11:21,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365972977] [2020-12-23 07:11:21,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-23 07:11:21,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:11:21,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-23 07:11:21,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 07:11:21,380 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand 36 states. [2020-12-23 07:11:23,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:11:23,056 INFO L93 Difference]: Finished difference Result 166 states and 178 transitions. [2020-12-23 07:11:23,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-23 07:11:23,057 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 74 [2020-12-23 07:11:23,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:11:23,058 INFO L225 Difference]: With dead ends: 166 [2020-12-23 07:11:23,058 INFO L226 Difference]: Without dead ends: 89 [2020-12-23 07:11:23,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 07:11:23,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-23 07:11:23,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 81. [2020-12-23 07:11:23,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-23 07:11:23,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2020-12-23 07:11:23,063 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 74 [2020-12-23 07:11:23,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:11:23,063 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2020-12-23 07:11:23,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-23 07:11:23,063 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2020-12-23 07:11:23,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-23 07:11:23,064 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:11:23,064 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:11:23,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-23 07:11:23,273 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:11:23,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:11:23,273 INFO L82 PathProgramCache]: Analyzing trace with hash -2004584321, now seen corresponding path program 33 times [2020-12-23 07:11:23,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:11:23,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776700029] [2020-12-23 07:11:23,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:11:23,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:11:24,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:11:24,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776700029] [2020-12-23 07:11:24,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923894064] [2020-12-23 07:11:24,385 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 07:11:25,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2020-12-23 07:11:25,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:11:25,562 WARN L261 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 82 conjunts are in the unsatisfiable core [2020-12-23 07:11:25,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:11:26,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:11:26,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:11:26,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-12-23 07:11:26,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396212605] [2020-12-23 07:11:26,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 07:11:26,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:11:26,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 07:11:26,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 07:11:26,373 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand 37 states. [2020-12-23 07:11:28,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:11:28,139 INFO L93 Difference]: Finished difference Result 170 states and 182 transitions. [2020-12-23 07:11:28,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 07:11:28,143 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 76 [2020-12-23 07:11:28,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:11:28,144 INFO L225 Difference]: With dead ends: 170 [2020-12-23 07:11:28,144 INFO L226 Difference]: Without dead ends: 91 [2020-12-23 07:11:28,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 63 SyntacticMatches, 14 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 07:11:28,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-23 07:11:28,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 83. [2020-12-23 07:11:28,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-23 07:11:28,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2020-12-23 07:11:28,148 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 76 [2020-12-23 07:11:28,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:11:28,149 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2020-12-23 07:11:28,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 07:11:28,149 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2020-12-23 07:11:28,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-23 07:11:28,149 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:11:28,150 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:11:28,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:11:28,353 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:11:28,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:11:28,354 INFO L82 PathProgramCache]: Analyzing trace with hash 2088016769, now seen corresponding path program 34 times [2020-12-23 07:11:28,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:11:28,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842078112] [2020-12-23 07:11:28,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:11:28,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:11:29,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:11:29,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842078112] [2020-12-23 07:11:29,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331307339] [2020-12-23 07:11:29,389 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 07:11:29,449 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:11:29,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:11:29,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 71 conjunts are in the unsatisfiable core [2020-12-23 07:11:29,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:11:29,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:11:29,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:11:29,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-12-23 07:11:29,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101291055] [2020-12-23 07:11:29,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-23 07:11:29,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:11:29,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-23 07:11:29,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 07:11:29,614 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand 38 states. [2020-12-23 07:11:31,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:11:31,466 INFO L93 Difference]: Finished difference Result 174 states and 186 transitions. [2020-12-23 07:11:31,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 07:11:31,466 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 78 [2020-12-23 07:11:31,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:11:31,467 INFO L225 Difference]: With dead ends: 174 [2020-12-23 07:11:31,467 INFO L226 Difference]: Without dead ends: 93 [2020-12-23 07:11:31,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 07:11:31,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-23 07:11:31,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 85. [2020-12-23 07:11:31,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-23 07:11:31,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2020-12-23 07:11:31,471 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 78 [2020-12-23 07:11:31,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:11:31,471 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2020-12-23 07:11:31,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-23 07:11:31,471 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2020-12-23 07:11:31,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-23 07:11:31,472 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:11:31,472 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:11:31,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-23 07:11:31,680 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:11:31,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:11:31,680 INFO L82 PathProgramCache]: Analyzing trace with hash 887621123, now seen corresponding path program 35 times [2020-12-23 07:11:31,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:11:31,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201426257] [2020-12-23 07:11:31,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:11:31,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:11:32,789 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 07:11:32,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201426257] [2020-12-23 07:11:32,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55071633] [2020-12-23 07:11:32,790 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 07:11:56,795 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2020-12-23 07:11:56,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:11:56,814 WARN L261 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 108 conjunts are in the unsatisfiable core [2020-12-23 07:11:56,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:11:58,241 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 07:11:58,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:11:58,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-12-23 07:11:58,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036456855] [2020-12-23 07:11:58,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-23 07:11:58,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:11:58,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-23 07:11:58,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 07:11:58,243 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand 39 states. [2020-12-23 07:12:00,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:12:00,337 INFO L93 Difference]: Finished difference Result 178 states and 190 transitions. [2020-12-23 07:12:00,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-23 07:12:00,337 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 80 [2020-12-23 07:12:00,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:12:00,338 INFO L225 Difference]: With dead ends: 178 [2020-12-23 07:12:00,338 INFO L226 Difference]: Without dead ends: 95 [2020-12-23 07:12:00,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 45 SyntacticMatches, 36 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 07:12:00,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-23 07:12:00,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 87. [2020-12-23 07:12:00,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-23 07:12:00,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2020-12-23 07:12:00,344 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 80 [2020-12-23 07:12:00,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:12:00,344 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2020-12-23 07:12:00,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-23 07:12:00,344 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2020-12-23 07:12:00,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-23 07:12:00,345 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:12:00,345 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:12:00,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:12:00,550 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:12:00,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:12:00,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1641359355, now seen corresponding path program 36 times [2020-12-23 07:12:00,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:12:00,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062529365] [2020-12-23 07:12:00,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:12:00,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:12:01,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:12:01,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062529365] [2020-12-23 07:12:01,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838047222] [2020-12-23 07:12:01,924 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 07:12:08,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2020-12-23 07:12:08,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:12:08,370 WARN L261 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 91 conjunts are in the unsatisfiable core [2020-12-23 07:12:08,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:12:08,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:12:08,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:12:08,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-23 07:12:08,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046150579] [2020-12-23 07:12:08,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 07:12:08,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:12:08,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 07:12:08,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 07:12:08,913 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand 40 states. [2020-12-23 07:12:11,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:12:11,051 INFO L93 Difference]: Finished difference Result 182 states and 194 transitions. [2020-12-23 07:12:11,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-23 07:12:11,055 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 82 [2020-12-23 07:12:11,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:12:11,056 INFO L225 Difference]: With dead ends: 182 [2020-12-23 07:12:11,056 INFO L226 Difference]: Without dead ends: 97 [2020-12-23 07:12:11,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 73 SyntacticMatches, 10 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 07:12:11,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-12-23 07:12:11,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 89. [2020-12-23 07:12:11,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-23 07:12:11,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2020-12-23 07:12:11,061 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 82 [2020-12-23 07:12:11,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:12:11,061 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2020-12-23 07:12:11,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 07:12:11,062 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2020-12-23 07:12:11,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-23 07:12:11,062 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:12:11,062 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:12:11,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-23 07:12:11,267 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:12:11,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:12:11,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1040109177, now seen corresponding path program 37 times [2020-12-23 07:12:11,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:12:11,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351368878] [2020-12-23 07:12:11,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:12:11,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:12:12,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:12:12,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351368878] [2020-12-23 07:12:12,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75621169] [2020-12-23 07:12:12,601 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 07:12:12,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:12:12,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 77 conjunts are in the unsatisfiable core [2020-12-23 07:12:12,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:12:12,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:12:12,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:12:12,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-12-23 07:12:12,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736106323] [2020-12-23 07:12:12,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-23 07:12:12,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:12:12,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-23 07:12:12,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 07:12:12,852 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand 41 states. [2020-12-23 07:12:15,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:12:15,142 INFO L93 Difference]: Finished difference Result 186 states and 198 transitions. [2020-12-23 07:12:15,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 07:12:15,142 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 84 [2020-12-23 07:12:15,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:12:15,143 INFO L225 Difference]: With dead ends: 186 [2020-12-23 07:12:15,143 INFO L226 Difference]: Without dead ends: 99 [2020-12-23 07:12:15,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 07:12:15,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-12-23 07:12:15,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 91. [2020-12-23 07:12:15,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-23 07:12:15,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2020-12-23 07:12:15,147 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 84 [2020-12-23 07:12:15,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:12:15,148 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2020-12-23 07:12:15,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-23 07:12:15,148 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2020-12-23 07:12:15,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-23 07:12:15,148 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:12:15,148 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:12:15,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-23 07:12:15,349 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:12:15,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:12:15,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1235694217, now seen corresponding path program 38 times [2020-12-23 07:12:15,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:12:15,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243632204] [2020-12-23 07:12:15,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:12:15,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:12:16,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:12:16,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243632204] [2020-12-23 07:12:16,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928731695] [2020-12-23 07:12:16,766 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 07:12:16,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:12:16,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:12:16,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 79 conjunts are in the unsatisfiable core [2020-12-23 07:12:16,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:12:17,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:12:17,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:12:17,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-12-23 07:12:17,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555646281] [2020-12-23 07:12:17,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-23 07:12:17,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:12:17,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-23 07:12:17,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 07:12:17,040 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand 42 states. [2020-12-23 07:12:19,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:12:19,491 INFO L93 Difference]: Finished difference Result 190 states and 202 transitions. [2020-12-23 07:12:19,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-23 07:12:19,492 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 86 [2020-12-23 07:12:19,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:12:19,493 INFO L225 Difference]: With dead ends: 190 [2020-12-23 07:12:19,493 INFO L226 Difference]: Without dead ends: 101 [2020-12-23 07:12:19,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 07:12:19,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-23 07:12:19,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 93. [2020-12-23 07:12:19,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-23 07:12:19,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2020-12-23 07:12:19,499 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 86 [2020-12-23 07:12:19,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:12:19,499 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2020-12-23 07:12:19,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-23 07:12:19,499 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2020-12-23 07:12:19,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-23 07:12:19,500 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:12:19,500 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:12:19,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-23 07:12:19,715 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:12:19,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:12:19,715 INFO L82 PathProgramCache]: Analyzing trace with hash 2144402187, now seen corresponding path program 39 times [2020-12-23 07:12:19,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:12:19,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608885422] [2020-12-23 07:12:19,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:12:19,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:12:21,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:12:21,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608885422] [2020-12-23 07:12:21,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859686859] [2020-12-23 07:12:21,164 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 07:12:23,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2020-12-23 07:12:23,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:12:23,294 WARN L261 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 93 conjunts are in the unsatisfiable core [2020-12-23 07:12:23,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:12:24,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:12:24,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:12:24,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-12-23 07:12:24,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723181681] [2020-12-23 07:12:24,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-23 07:12:24,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:12:24,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-23 07:12:24,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 07:12:24,284 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand 43 states. [2020-12-23 07:12:26,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:12:26,798 INFO L93 Difference]: Finished difference Result 194 states and 206 transitions. [2020-12-23 07:12:26,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-23 07:12:26,799 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 88 [2020-12-23 07:12:26,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:12:26,800 INFO L225 Difference]: With dead ends: 194 [2020-12-23 07:12:26,800 INFO L226 Difference]: Without dead ends: 103 [2020-12-23 07:12:26,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 76 SyntacticMatches, 13 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 07:12:26,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-12-23 07:12:26,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 95. [2020-12-23 07:12:26,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-12-23 07:12:26,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2020-12-23 07:12:26,804 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 88 [2020-12-23 07:12:26,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:12:26,804 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2020-12-23 07:12:26,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-23 07:12:26,805 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2020-12-23 07:12:26,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-23 07:12:26,805 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:12:26,805 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:12:27,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-23 07:12:27,009 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:12:27,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:12:27,010 INFO L82 PathProgramCache]: Analyzing trace with hash -760567027, now seen corresponding path program 40 times [2020-12-23 07:12:27,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:12:27,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779183632] [2020-12-23 07:12:27,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:12:27,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:12:28,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:12:28,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779183632] [2020-12-23 07:12:28,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634160079] [2020-12-23 07:12:28,524 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 07:12:28,589 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:12:28,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:12:28,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 83 conjunts are in the unsatisfiable core [2020-12-23 07:12:28,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:12:28,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:12:28,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:12:28,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2020-12-23 07:12:28,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017678014] [2020-12-23 07:12:28,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-23 07:12:28,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:12:28,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-23 07:12:28,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 07:12:28,774 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand 44 states. [2020-12-23 07:12:31,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:12:31,469 INFO L93 Difference]: Finished difference Result 198 states and 210 transitions. [2020-12-23 07:12:31,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-23 07:12:31,474 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 90 [2020-12-23 07:12:31,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:12:31,475 INFO L225 Difference]: With dead ends: 198 [2020-12-23 07:12:31,475 INFO L226 Difference]: Without dead ends: 105 [2020-12-23 07:12:31,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 07:12:31,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-12-23 07:12:31,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 97. [2020-12-23 07:12:31,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-23 07:12:31,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2020-12-23 07:12:31,481 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 90 [2020-12-23 07:12:31,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:12:31,481 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2020-12-23 07:12:31,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-23 07:12:31,482 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2020-12-23 07:12:31,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-12-23 07:12:31,482 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:12:31,482 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:12:31,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:12:31,697 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:12:31,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:12:31,697 INFO L82 PathProgramCache]: Analyzing trace with hash -707239281, now seen corresponding path program 41 times [2020-12-23 07:12:31,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:12:31,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516177037] [2020-12-23 07:12:31,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:12:31,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:12:33,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:12:33,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516177037] [2020-12-23 07:12:33,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57041276] [2020-12-23 07:12:33,291 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 07:13:28,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2020-12-23 07:13:28,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:13:28,123 WARN L261 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 125 conjunts are in the unsatisfiable core [2020-12-23 07:13:28,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:30,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:13:30,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:13:30,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2020-12-23 07:13:30,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121478043] [2020-12-23 07:13:30,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-23 07:13:30,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:30,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-23 07:13:30,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 07:13:30,018 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand 45 states. [2020-12-23 07:13:32,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:32,779 INFO L93 Difference]: Finished difference Result 202 states and 214 transitions. [2020-12-23 07:13:32,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-23 07:13:32,780 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 92 [2020-12-23 07:13:32,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:32,781 INFO L225 Difference]: With dead ends: 202 [2020-12-23 07:13:32,781 INFO L226 Difference]: Without dead ends: 107 [2020-12-23 07:13:32,782 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 52 SyntacticMatches, 41 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 07:13:32,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-12-23 07:13:32,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 99. [2020-12-23 07:13:32,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-23 07:13:32,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 103 transitions. [2020-12-23 07:13:32,786 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 103 transitions. Word has length 92 [2020-12-23 07:13:32,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:32,786 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 103 transitions. [2020-12-23 07:13:32,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-23 07:13:32,786 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 103 transitions. [2020-12-23 07:13:32,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-23 07:13:32,787 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:32,787 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:32,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-12-23 07:13:32,994 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:32,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:32,995 INFO L82 PathProgramCache]: Analyzing trace with hash -998882927, now seen corresponding path program 42 times [2020-12-23 07:13:32,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:32,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058008109] [2020-12-23 07:13:32,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:33,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:34,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:13:34,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058008109] [2020-12-23 07:13:34,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360730997] [2020-12-23 07:13:34,746 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 07:13:39,341 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2020-12-23 07:13:39,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:13:39,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 93 conjunts are in the unsatisfiable core [2020-12-23 07:13:39,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:39,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:13:39,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:13:39,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2020-12-23 07:13:39,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636377868] [2020-12-23 07:13:39,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-23 07:13:39,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:39,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-23 07:13:39,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1938, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 07:13:39,576 INFO L87 Difference]: Start difference. First operand 99 states and 103 transitions. Second operand 46 states. [2020-12-23 07:13:42,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:42,503 INFO L93 Difference]: Finished difference Result 206 states and 218 transitions. [2020-12-23 07:13:42,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-23 07:13:42,503 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 94 [2020-12-23 07:13:42,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:42,504 INFO L225 Difference]: With dead ends: 206 [2020-12-23 07:13:42,504 INFO L226 Difference]: Without dead ends: 109 [2020-12-23 07:13:42,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=132, Invalid=1938, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 07:13:42,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-23 07:13:42,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 101. [2020-12-23 07:13:42,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-12-23 07:13:42,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2020-12-23 07:13:42,509 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 94 [2020-12-23 07:13:42,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:42,509 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2020-12-23 07:13:42,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-23 07:13:42,509 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2020-12-23 07:13:42,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-23 07:13:42,510 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:42,510 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:42,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:42,716 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:42,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:42,717 INFO L82 PathProgramCache]: Analyzing trace with hash -2095552493, now seen corresponding path program 43 times [2020-12-23 07:13:42,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:42,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923474770] [2020-12-23 07:13:42,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:42,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:44,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:13:44,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923474770] [2020-12-23 07:13:44,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367224218] [2020-12-23 07:13:44,370 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 07:13:44,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:44,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 89 conjunts are in the unsatisfiable core [2020-12-23 07:13:44,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:44,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:13:44,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:13:44,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2020-12-23 07:13:44,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265501693] [2020-12-23 07:13:44,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-23 07:13:44,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:44,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-23 07:13:44,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2027, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 07:13:44,662 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand 47 states. [2020-12-23 07:13:47,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:47,769 INFO L93 Difference]: Finished difference Result 210 states and 222 transitions. [2020-12-23 07:13:47,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-23 07:13:47,769 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 96 [2020-12-23 07:13:47,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:47,770 INFO L225 Difference]: With dead ends: 210 [2020-12-23 07:13:47,770 INFO L226 Difference]: Without dead ends: 111 [2020-12-23 07:13:47,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=135, Invalid=2027, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 07:13:47,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-12-23 07:13:47,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 103. [2020-12-23 07:13:47,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-12-23 07:13:47,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2020-12-23 07:13:47,775 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 96 [2020-12-23 07:13:47,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:47,775 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2020-12-23 07:13:47,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-23 07:13:47,776 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2020-12-23 07:13:47,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-23 07:13:47,776 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:47,776 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:47,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:47,992 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:47,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:47,992 INFO L82 PathProgramCache]: Analyzing trace with hash 566949397, now seen corresponding path program 44 times [2020-12-23 07:13:47,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:47,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367014579] [2020-12-23 07:13:47,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:48,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:49,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:13:49,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367014579] [2020-12-23 07:13:49,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865860847] [2020-12-23 07:13:49,800 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 07:13:49,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:13:49,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:13:49,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 91 conjunts are in the unsatisfiable core [2020-12-23 07:13:49,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:50,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:13:50,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:13:50,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2020-12-23 07:13:50,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166873965] [2020-12-23 07:13:50,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-23 07:13:50,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:50,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-23 07:13:50,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2118, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 07:13:50,104 INFO L87 Difference]: Start difference. First operand 103 states and 107 transitions. Second operand 48 states. [2020-12-23 07:13:52,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:52,972 INFO L93 Difference]: Finished difference Result 214 states and 226 transitions. [2020-12-23 07:13:52,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-23 07:13:52,974 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 98 [2020-12-23 07:13:52,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:52,975 INFO L225 Difference]: With dead ends: 214 [2020-12-23 07:13:52,975 INFO L226 Difference]: Without dead ends: 113 [2020-12-23 07:13:52,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=138, Invalid=2118, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 07:13:52,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-12-23 07:13:52,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 105. [2020-12-23 07:13:52,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-12-23 07:13:52,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2020-12-23 07:13:52,979 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 98 [2020-12-23 07:13:52,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:52,980 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2020-12-23 07:13:52,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-23 07:13:52,980 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2020-12-23 07:13:52,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-23 07:13:52,980 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:52,981 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:53,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-23 07:13:53,196 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:53,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:53,196 INFO L82 PathProgramCache]: Analyzing trace with hash -569242729, now seen corresponding path program 45 times [2020-12-23 07:13:53,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:53,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936442842] [2020-12-23 07:13:53,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:53,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:55,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:13:55,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936442842] [2020-12-23 07:13:55,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336380671] [2020-12-23 07:13:55,205 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 07:14:00,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2020-12-23 07:14:00,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:14:00,038 WARN L261 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 102 conjunts are in the unsatisfiable core [2020-12-23 07:14:00,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:14:00,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:14:00,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:14:00,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2020-12-23 07:14:00,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481447781] [2020-12-23 07:14:00,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-23 07:14:00,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:14:00,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-23 07:14:00,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 07:14:00,964 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand 49 states. [2020-12-23 07:14:04,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:14:04,403 INFO L93 Difference]: Finished difference Result 218 states and 230 transitions. [2020-12-23 07:14:04,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-23 07:14:04,403 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 100 [2020-12-23 07:14:04,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:14:04,404 INFO L225 Difference]: With dead ends: 218 [2020-12-23 07:14:04,404 INFO L226 Difference]: Without dead ends: 115 [2020-12-23 07:14:04,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 91 SyntacticMatches, 10 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 07:14:04,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-12-23 07:14:04,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 107. [2020-12-23 07:14:04,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-12-23 07:14:04,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2020-12-23 07:14:04,409 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 100 [2020-12-23 07:14:04,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:14:04,410 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2020-12-23 07:14:04,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-23 07:14:04,410 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2020-12-23 07:14:04,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-12-23 07:14:04,411 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:14:04,411 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:14:04,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-23 07:14:04,619 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:14:04,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:14:04,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1528182631, now seen corresponding path program 46 times [2020-12-23 07:14:04,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:14:04,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45924158] [2020-12-23 07:14:04,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:14:04,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:14:06,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:14:06,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45924158] [2020-12-23 07:14:06,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897842072] [2020-12-23 07:14:06,716 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 07:14:06,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:14:06,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:14:06,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 95 conjunts are in the unsatisfiable core [2020-12-23 07:14:06,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:14:07,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:14:07,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:14:07,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2020-12-23 07:14:07,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082697982] [2020-12-23 07:14:07,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-23 07:14:07,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:14:07,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-23 07:14:07,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=2306, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 07:14:07,027 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand 50 states. [2020-12-23 07:14:10,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:14:10,620 INFO L93 Difference]: Finished difference Result 222 states and 234 transitions. [2020-12-23 07:14:10,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-23 07:14:10,621 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 102 [2020-12-23 07:14:10,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:14:10,622 INFO L225 Difference]: With dead ends: 222 [2020-12-23 07:14:10,622 INFO L226 Difference]: Without dead ends: 117 [2020-12-23 07:14:10,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=144, Invalid=2306, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 07:14:10,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-12-23 07:14:10,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 109. [2020-12-23 07:14:10,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-12-23 07:14:10,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 113 transitions. [2020-12-23 07:14:10,627 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 113 transitions. Word has length 102 [2020-12-23 07:14:10,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:14:10,627 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 113 transitions. [2020-12-23 07:14:10,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-23 07:14:10,627 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 113 transitions. [2020-12-23 07:14:10,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-23 07:14:10,628 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:14:10,628 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:14:10,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-23 07:14:10,844 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:14:10,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:14:10,844 INFO L82 PathProgramCache]: Analyzing trace with hash 348540187, now seen corresponding path program 47 times [2020-12-23 07:14:10,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:14:10,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120396640] [2020-12-23 07:14:10,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:14:10,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:14:13,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:14:13,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120396640] [2020-12-23 07:14:13,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287670666] [2020-12-23 07:14:13,019 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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