/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/array-examples/standard_compare_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-22 23:52:21,182 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 23:52:21,185 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 23:52:21,227 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 23:52:21,228 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 23:52:21,229 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 23:52:21,231 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 23:52:21,234 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 23:52:21,236 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 23:52:21,237 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 23:52:21,238 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 23:52:21,240 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 23:52:21,240 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 23:52:21,242 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 23:52:21,243 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 23:52:21,245 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 23:52:21,256 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 23:52:21,259 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 23:52:21,265 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 23:52:21,272 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 23:52:21,274 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 23:52:21,278 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 23:52:21,283 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 23:52:21,284 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 23:52:21,290 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 23:52:21,300 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 23:52:21,306 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 23:52:21,307 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 23:52:21,309 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 23:52:21,310 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 23:52:21,311 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 23:52:21,312 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 23:52:21,312 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 23:52:21,313 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 23:52:21,314 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 23:52:21,319 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 23:52:21,324 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 23:52:21,351 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 23:52:21,351 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 23:52:21,353 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 23:52:21,353 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 23:52:21,353 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 23:52:21,353 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 23:52:21,354 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 23:52:21,354 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 23:52:21,354 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 23:52:21,354 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 23:52:21,355 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 23:52:21,355 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 23:52:21,355 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 23:52:21,355 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 23:52:21,355 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 23:52:21,356 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 23:52:21,356 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 23:52:21,356 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 23:52:21,356 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 23:52:21,357 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 23:52:21,357 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 23:52:21,357 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 23:52:21,357 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 23:52:21,357 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 23:52:21,358 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 23:52:21,358 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 23:52:21,725 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 23:52:21,762 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 23:52:21,766 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 23:52:21,767 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 23:52:21,768 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 23:52:21,769 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_compare_ground.i [2020-12-22 23:52:21,857 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/7aac0cae9/7cd23c889f904200ba4f7c2b6073a612/FLAG91da875bd [2020-12-22 23:52:22,610 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 23:52:22,611 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_compare_ground.i [2020-12-22 23:52:22,624 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/7aac0cae9/7cd23c889f904200ba4f7c2b6073a612/FLAG91da875bd [2020-12-22 23:52:22,913 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/7aac0cae9/7cd23c889f904200ba4f7c2b6073a612 [2020-12-22 23:52:22,921 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 23:52:22,923 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 23:52:22,928 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 23:52:22,928 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 23:52:22,932 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 23:52:22,933 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:52:22" (1/1) ... [2020-12-22 23:52:22,934 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a6c469 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:22, skipping insertion in model container [2020-12-22 23:52:22,935 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:52:22" (1/1) ... [2020-12-22 23:52:22,944 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 23:52:22,962 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 23:52:23,121 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/array-examples/standard_compare_ground.i[816,829] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~j~0,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~b~0,],[IdentifierExpression[~j~0,]]] left hand side expression in assignment: lhs: VariableLHS[~rv~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2020-12-22 23:52:23,142 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 23:52:23,150 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 23:52:23,165 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/array-examples/standard_compare_ground.i[816,829] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~j~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#b~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#b~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~j~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~rv~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2020-12-22 23:52:23,175 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 23:52:23,194 INFO L208 MainTranslator]: Completed translation [2020-12-22 23:52:23,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:23 WrapperNode [2020-12-22 23:52:23,195 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 23:52:23,196 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 23:52:23,196 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 23:52:23,196 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 23:52:23,205 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:23" (1/1) ... [2020-12-22 23:52:23,214 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:23" (1/1) ... [2020-12-22 23:52:23,236 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 23:52:23,238 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 23:52:23,238 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 23:52:23,238 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 23:52:23,248 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:23" (1/1) ... [2020-12-22 23:52:23,249 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:23" (1/1) ... [2020-12-22 23:52:23,251 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:23" (1/1) ... [2020-12-22 23:52:23,252 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:23" (1/1) ... [2020-12-22 23:52:23,259 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:23" (1/1) ... [2020-12-22 23:52:23,264 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:23" (1/1) ... [2020-12-22 23:52:23,267 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:23" (1/1) ... [2020-12-22 23:52:23,269 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 23:52:23,271 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 23:52:23,271 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 23:52:23,271 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 23:52:23,272 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:23" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 23:52:23,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 23:52:23,378 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 23:52:23,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 23:52:23,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 23:52:23,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 23:52:23,379 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 23:52:23,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 23:52:23,663 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 23:52:23,663 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-22 23:52:23,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:52:23 BoogieIcfgContainer [2020-12-22 23:52:23,665 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 23:52:23,667 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 23:52:23,667 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 23:52:23,671 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 23:52:23,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 11:52:22" (1/3) ... [2020-12-22 23:52:23,672 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@439c131 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:52:23, skipping insertion in model container [2020-12-22 23:52:23,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:23" (2/3) ... [2020-12-22 23:52:23,673 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@439c131 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:52:23, skipping insertion in model container [2020-12-22 23:52:23,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:52:23" (3/3) ... [2020-12-22 23:52:23,675 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_compare_ground.i [2020-12-22 23:52:23,683 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 23:52:23,689 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 23:52:23,714 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 23:52:23,746 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 23:52:23,746 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 23:52:23,746 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 23:52:23,746 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 23:52:23,747 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 23:52:23,747 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 23:52:23,747 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 23:52:23,747 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 23:52:23,764 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-12-22 23:52:23,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 23:52:23,771 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:23,772 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:23,772 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:23,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:23,780 INFO L82 PathProgramCache]: Analyzing trace with hash -2005121311, now seen corresponding path program 1 times [2020-12-22 23:52:23,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:23,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542564983] [2020-12-22 23:52:23,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:23,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:23,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:52:23,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542564983] [2020-12-22 23:52:23,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 23:52:23,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 23:52:23,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689020110] [2020-12-22 23:52:23,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 23:52:23,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:23,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 23:52:23,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 23:52:23,986 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-12-22 23:52:24,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:24,006 INFO L93 Difference]: Finished difference Result 34 states and 48 transitions. [2020-12-22 23:52:24,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 23:52:24,007 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-12-22 23:52:24,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:24,016 INFO L225 Difference]: With dead ends: 34 [2020-12-22 23:52:24,016 INFO L226 Difference]: Without dead ends: 15 [2020-12-22 23:52:24,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 23:52:24,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-22 23:52:24,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-22 23:52:24,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-22 23:52:24,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2020-12-22 23:52:24,060 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 9 [2020-12-22 23:52:24,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:24,061 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2020-12-22 23:52:24,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 23:52:24,061 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2020-12-22 23:52:24,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 23:52:24,062 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:24,062 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:24,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 23:52:24,063 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:24,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:24,064 INFO L82 PathProgramCache]: Analyzing trace with hash -2015280042, now seen corresponding path program 1 times [2020-12-22 23:52:24,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:24,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846516272] [2020-12-22 23:52:24,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:24,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:24,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:52:24,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846516272] [2020-12-22 23:52:24,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 23:52:24,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 23:52:24,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069774927] [2020-12-22 23:52:24,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 23:52:24,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:24,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 23:52:24,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 23:52:24,153 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 3 states. [2020-12-22 23:52:24,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:24,205 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2020-12-22 23:52:24,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 23:52:24,208 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-12-22 23:52:24,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:24,209 INFO L225 Difference]: With dead ends: 28 [2020-12-22 23:52:24,209 INFO L226 Difference]: Without dead ends: 17 [2020-12-22 23:52:24,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 23:52:24,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-22 23:52:24,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2020-12-22 23:52:24,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-22 23:52:24,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2020-12-22 23:52:24,222 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 9 [2020-12-22 23:52:24,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:24,225 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2020-12-22 23:52:24,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 23:52:24,225 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2020-12-22 23:52:24,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 23:52:24,226 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:24,226 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:24,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 23:52:24,227 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:24,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:24,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1565815188, now seen corresponding path program 1 times [2020-12-22 23:52:24,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:24,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490338999] [2020-12-22 23:52:24,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:24,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:24,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:52:24,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490338999] [2020-12-22 23:52:24,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918970343] [2020-12-22 23:52:24,328 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 [2020-12-22 23:52:24,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:24,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 23:52:24,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:52:24,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 23:52:24,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 23:52:24,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-22 23:52:24,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712239819] [2020-12-22 23:52:24,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 23:52:24,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:24,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 23:52:24,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:52:24,510 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand 3 states. [2020-12-22 23:52:24,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:24,528 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2020-12-22 23:52:24,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 23:52:24,529 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-12-22 23:52:24,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:24,530 INFO L225 Difference]: With dead ends: 26 [2020-12-22 23:52:24,530 INFO L226 Difference]: Without dead ends: 19 [2020-12-22 23:52:24,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:52:24,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-22 23:52:24,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2020-12-22 23:52:24,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-22 23:52:24,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2020-12-22 23:52:24,539 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 11 [2020-12-22 23:52:24,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:24,539 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2020-12-22 23:52:24,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 23:52:24,539 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2020-12-22 23:52:24,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 23:52:24,540 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:24,540 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:24,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-22 23:52:24,754 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:24,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:24,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1959146159, now seen corresponding path program 1 times [2020-12-22 23:52:24,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:24,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53715791] [2020-12-22 23:52:24,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:24,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:24,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 23:52:24,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53715791] [2020-12-22 23:52:24,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114737468] [2020-12-22 23:52:24,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:52:24,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:24,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 23:52:24,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:52:24,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 23:52:24,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 23:52:24,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-22 23:52:24,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730683090] [2020-12-22 23:52:24,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 23:52:24,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:24,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 23:52:24,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:52:24,868 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 3 states. [2020-12-22 23:52:24,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:24,882 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-12-22 23:52:24,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 23:52:24,882 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-12-22 23:52:24,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:24,883 INFO L225 Difference]: With dead ends: 27 [2020-12-22 23:52:24,883 INFO L226 Difference]: Without dead ends: 17 [2020-12-22 23:52:24,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:52:24,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-22 23:52:24,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-22 23:52:24,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-22 23:52:24,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-12-22 23:52:24,888 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2020-12-22 23:52:24,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:24,889 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-12-22 23:52:24,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 23:52:24,889 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-12-22 23:52:24,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 23:52:24,890 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:24,890 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:25,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:52:25,106 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:25,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:25,108 INFO L82 PathProgramCache]: Analyzing trace with hash -184138797, now seen corresponding path program 1 times [2020-12-22 23:52:25,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:25,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994445477] [2020-12-22 23:52:25,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:25,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:25,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 23:52:25,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994445477] [2020-12-22 23:52:25,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265269188] [2020-12-22 23:52:25,151 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 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 [2020-12-22 23:52:25,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:25,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 23:52:25,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:52:25,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 23:52:25,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:52:25,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 23:52:25,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322632288] [2020-12-22 23:52:25,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 23:52:25,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:25,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 23:52:25,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:52:25,259 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 5 states. [2020-12-22 23:52:25,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:25,277 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-12-22 23:52:25,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 23:52:25,278 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-12-22 23:52:25,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:25,279 INFO L225 Difference]: With dead ends: 32 [2020-12-22 23:52:25,279 INFO L226 Difference]: Without dead ends: 20 [2020-12-22 23:52:25,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:52:25,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-22 23:52:25,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-12-22 23:52:25,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-22 23:52:25,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-12-22 23:52:25,284 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 14 [2020-12-22 23:52:25,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:25,284 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-12-22 23:52:25,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 23:52:25,284 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-12-22 23:52:25,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 23:52:25,285 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:25,285 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:25,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:52:25,499 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:25,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:25,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1017926315, now seen corresponding path program 2 times [2020-12-22 23:52:25,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:25,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540900676] [2020-12-22 23:52:25,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:25,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:25,550 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 23:52:25,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540900676] [2020-12-22 23:52:25,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405237812] [2020-12-22 23:52:25,551 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 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 [2020-12-22 23:52:25,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:52:25,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:52:25,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 23:52:25,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:52:25,710 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 23:52:25,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:52:25,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-12-22 23:52:25,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569282275] [2020-12-22 23:52:25,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 23:52:25,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:25,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 23:52:25,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 23:52:25,713 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 7 states. [2020-12-22 23:52:25,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:25,775 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-12-22 23:52:25,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 23:52:25,778 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-12-22 23:52:25,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:25,779 INFO L225 Difference]: With dead ends: 39 [2020-12-22 23:52:25,779 INFO L226 Difference]: Without dead ends: 27 [2020-12-22 23:52:25,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 23:52:25,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-22 23:52:25,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2020-12-22 23:52:25,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-22 23:52:25,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-12-22 23:52:25,788 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 16 [2020-12-22 23:52:25,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:25,788 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-12-22 23:52:25,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 23:52:25,788 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-12-22 23:52:25,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 23:52:25,789 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:25,789 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:25,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:52:25,991 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:25,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:25,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1705829328, now seen corresponding path program 3 times [2020-12-22 23:52:25,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:25,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163337076] [2020-12-22 23:52:25,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:26,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:26,106 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 23:52:26,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163337076] [2020-12-22 23:52:26,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895801413] [2020-12-22 23:52:26,107 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 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 [2020-12-22 23:52:26,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 23:52:26,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:52:26,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 23:52:26,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:52:26,206 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 23:52:26,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:52:26,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2020-12-22 23:52:26,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723460425] [2020-12-22 23:52:26,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 23:52:26,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:26,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 23:52:26,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-22 23:52:26,209 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 9 states. [2020-12-22 23:52:26,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:26,267 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2020-12-22 23:52:26,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 23:52:26,268 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-12-22 23:52:26,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:26,269 INFO L225 Difference]: With dead ends: 47 [2020-12-22 23:52:26,269 INFO L226 Difference]: Without dead ends: 32 [2020-12-22 23:52:26,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-22 23:52:26,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-22 23:52:26,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2020-12-22 23:52:26,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-22 23:52:26,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-12-22 23:52:26,274 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 21 [2020-12-22 23:52:26,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:26,275 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-12-22 23:52:26,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 23:52:26,275 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-12-22 23:52:26,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 23:52:26,276 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:26,276 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:26,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-22 23:52:26,491 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:26,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:26,492 INFO L82 PathProgramCache]: Analyzing trace with hash 2018980537, now seen corresponding path program 4 times [2020-12-22 23:52:26,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:26,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532863320] [2020-12-22 23:52:26,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:26,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:26,587 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 23:52:26,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532863320] [2020-12-22 23:52:26,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140435337] [2020-12-22 23:52:26,588 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 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 [2020-12-22 23:52:26,650 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:52:26,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:52:26,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 23:52:26,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:52:26,696 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 23:52:26,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:52:26,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-22 23:52:26,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121481994] [2020-12-22 23:52:26,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 23:52:26,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:26,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 23:52:26,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 23:52:26,700 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 8 states. [2020-12-22 23:52:26,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:26,733 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-12-22 23:52:26,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 23:52:26,734 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-12-22 23:52:26,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:26,735 INFO L225 Difference]: With dead ends: 50 [2020-12-22 23:52:26,736 INFO L226 Difference]: Without dead ends: 32 [2020-12-22 23:52:26,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 23:52:26,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-22 23:52:26,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-12-22 23:52:26,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-22 23:52:26,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-12-22 23:52:26,742 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 26 [2020-12-22 23:52:26,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:26,743 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-12-22 23:52:26,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 23:52:26,744 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-12-22 23:52:26,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 23:52:26,745 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:26,746 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:26,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:52:26,960 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:26,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:26,961 INFO L82 PathProgramCache]: Analyzing trace with hash 391670075, now seen corresponding path program 5 times [2020-12-22 23:52:26,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:26,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809972043] [2020-12-22 23:52:26,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:27,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:27,088 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 23:52:27,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809972043] [2020-12-22 23:52:27,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482711227] [2020-12-22 23:52:27,089 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 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 [2020-12-22 23:52:27,262 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-22 23:52:27,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:52:27,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 23:52:27,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:52:27,349 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-22 23:52:27,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:52:27,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2020-12-22 23:52:27,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787557025] [2020-12-22 23:52:27,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 23:52:27,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:27,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 23:52:27,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-12-22 23:52:27,353 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 12 states. [2020-12-22 23:52:27,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:27,430 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2020-12-22 23:52:27,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 23:52:27,431 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-12-22 23:52:27,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:27,432 INFO L225 Difference]: With dead ends: 57 [2020-12-22 23:52:27,432 INFO L226 Difference]: Without dead ends: 39 [2020-12-22 23:52:27,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-12-22 23:52:27,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-22 23:52:27,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-12-22 23:52:27,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-22 23:52:27,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-12-22 23:52:27,439 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 28 [2020-12-22 23:52:27,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:27,439 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-12-22 23:52:27,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 23:52:27,440 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-12-22 23:52:27,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-22 23:52:27,441 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:27,441 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:27,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:52:27,646 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:27,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:27,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1709007242, now seen corresponding path program 6 times [2020-12-22 23:52:27,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:27,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237533828] [2020-12-22 23:52:27,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:27,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:27,781 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-22 23:52:27,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237533828] [2020-12-22 23:52:27,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481595325] [2020-12-22 23:52:27,782 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 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 [2020-12-22 23:52:27,854 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-22 23:52:27,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:52:27,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 23:52:27,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:52:28,065 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-22 23:52:28,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:52:28,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2020-12-22 23:52:28,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231570873] [2020-12-22 23:52:28,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 23:52:28,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:28,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 23:52:28,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-12-22 23:52:28,068 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 15 states. [2020-12-22 23:52:28,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:28,389 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2020-12-22 23:52:28,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 23:52:28,390 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 33 [2020-12-22 23:52:28,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:28,390 INFO L225 Difference]: With dead ends: 65 [2020-12-22 23:52:28,391 INFO L226 Difference]: Without dead ends: 44 [2020-12-22 23:52:28,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2020-12-22 23:52:28,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-22 23:52:28,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2020-12-22 23:52:28,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-22 23:52:28,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-12-22 23:52:28,398 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 33 [2020-12-22 23:52:28,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:28,399 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-12-22 23:52:28,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 23:52:28,399 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-12-22 23:52:28,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-22 23:52:28,400 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:28,400 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:28,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 23:52:28,615 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:28,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:28,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1640083010, now seen corresponding path program 1 times [2020-12-22 23:52:28,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:28,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555499606] [2020-12-22 23:52:28,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:28,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:28,764 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-22 23:52:28,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555499606] [2020-12-22 23:52:28,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765202305] [2020-12-22 23:52:28,765 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 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 [2020-12-22 23:52:28,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:28,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 23:52:28,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:52:28,906 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-22 23:52:28,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:52:28,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-22 23:52:28,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977390473] [2020-12-22 23:52:28,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 23:52:28,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:28,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 23:52:28,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 23:52:28,909 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 11 states. [2020-12-22 23:52:28,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:28,957 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2020-12-22 23:52:28,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 23:52:28,962 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-12-22 23:52:28,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:28,965 INFO L225 Difference]: With dead ends: 66 [2020-12-22 23:52:28,966 INFO L226 Difference]: Without dead ends: 43 [2020-12-22 23:52:28,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 23:52:28,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-22 23:52:28,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-12-22 23:52:28,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-22 23:52:28,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-12-22 23:52:28,983 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 39 [2020-12-22 23:52:28,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:28,984 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-12-22 23:52:28,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 23:52:28,984 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-12-22 23:52:28,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 23:52:28,989 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:28,992 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:29,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:52:29,207 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:29,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:29,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1543160196, now seen corresponding path program 2 times [2020-12-22 23:52:29,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:29,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713310102] [2020-12-22 23:52:29,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:29,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:29,363 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-22 23:52:29,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713310102] [2020-12-22 23:52:29,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541762475] [2020-12-22 23:52:29,364 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 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 [2020-12-22 23:52:29,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:52:29,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:52:29,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 23:52:29,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:52:29,546 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-22 23:52:29,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:52:29,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-22 23:52:29,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377946801] [2020-12-22 23:52:29,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 23:52:29,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:29,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 23:52:29,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 23:52:29,550 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 12 states. [2020-12-22 23:52:29,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:29,628 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2020-12-22 23:52:29,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 23:52:29,629 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2020-12-22 23:52:29,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:29,630 INFO L225 Difference]: With dead ends: 68 [2020-12-22 23:52:29,630 INFO L226 Difference]: Without dead ends: 45 [2020-12-22 23:52:29,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 23:52:29,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-22 23:52:29,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-12-22 23:52:29,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-22 23:52:29,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-12-22 23:52:29,645 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 41 [2020-12-22 23:52:29,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:29,646 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-12-22 23:52:29,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 23:52:29,647 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-12-22 23:52:29,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 23:52:29,647 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:29,648 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:29,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:52:29,863 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:29,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:29,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1405350842, now seen corresponding path program 3 times [2020-12-22 23:52:29,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:29,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015612571] [2020-12-22 23:52:29,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:29,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:29,981 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-22 23:52:29,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015612571] [2020-12-22 23:52:29,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020122997] [2020-12-22 23:52:29,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 23:52:30,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-22 23:52:30,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:52:30,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 23:52:30,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:52:30,200 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-12-22 23:52:30,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:52:30,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 17 [2020-12-22 23:52:30,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527390580] [2020-12-22 23:52:30,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 23:52:30,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:30,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 23:52:30,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-12-22 23:52:30,203 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 17 states. [2020-12-22 23:52:30,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:30,287 INFO L93 Difference]: Finished difference Result 75 states and 80 transitions. [2020-12-22 23:52:30,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 23:52:30,288 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 43 [2020-12-22 23:52:30,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:30,288 INFO L225 Difference]: With dead ends: 75 [2020-12-22 23:52:30,288 INFO L226 Difference]: Without dead ends: 52 [2020-12-22 23:52:30,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-12-22 23:52:30,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-22 23:52:30,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2020-12-22 23:52:30,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-22 23:52:30,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2020-12-22 23:52:30,295 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 43 [2020-12-22 23:52:30,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:30,295 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2020-12-22 23:52:30,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 23:52:30,295 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2020-12-22 23:52:30,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 23:52:30,296 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:30,296 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:30,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 23:52:30,511 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:30,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:30,512 INFO L82 PathProgramCache]: Analyzing trace with hash -75756645, now seen corresponding path program 4 times [2020-12-22 23:52:30,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:30,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389708112] [2020-12-22 23:52:30,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:30,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:30,642 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-22 23:52:30,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389708112] [2020-12-22 23:52:30,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225534607] [2020-12-22 23:52:30,643 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 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 [2020-12-22 23:52:30,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:52:30,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:52:30,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 23:52:30,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:52:30,793 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-22 23:52:30,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:52:30,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-22 23:52:30,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915488043] [2020-12-22 23:52:30,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 23:52:30,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:30,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 23:52:30,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-22 23:52:30,795 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 14 states. [2020-12-22 23:52:30,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:30,841 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2020-12-22 23:52:30,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 23:52:30,841 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2020-12-22 23:52:30,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:30,842 INFO L225 Difference]: With dead ends: 78 [2020-12-22 23:52:30,842 INFO L226 Difference]: Without dead ends: 52 [2020-12-22 23:52:30,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-22 23:52:30,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-22 23:52:30,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-12-22 23:52:30,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-22 23:52:30,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-12-22 23:52:30,848 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 48 [2020-12-22 23:52:30,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:30,848 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-12-22 23:52:30,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 23:52:30,849 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-12-22 23:52:30,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 23:52:30,849 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:30,849 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:31,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 23:52:31,065 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:31,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:31,066 INFO L82 PathProgramCache]: Analyzing trace with hash 390108317, now seen corresponding path program 5 times [2020-12-22 23:52:31,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:31,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253598933] [2020-12-22 23:52:31,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:31,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:31,205 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-22 23:52:31,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253598933] [2020-12-22 23:52:31,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211731938] [2020-12-22 23:52:31,206 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 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 [2020-12-22 23:52:32,070 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-22 23:52:32,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:52:32,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 23:52:32,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:52:32,168 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-22 23:52:32,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:52:32,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-22 23:52:32,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131451468] [2020-12-22 23:52:32,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 23:52:32,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:32,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 23:52:32,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-22 23:52:32,175 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 15 states. [2020-12-22 23:52:32,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:32,241 INFO L93 Difference]: Finished difference Result 80 states and 84 transitions. [2020-12-22 23:52:32,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 23:52:32,242 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 50 [2020-12-22 23:52:32,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:32,242 INFO L225 Difference]: With dead ends: 80 [2020-12-22 23:52:32,242 INFO L226 Difference]: Without dead ends: 54 [2020-12-22 23:52:32,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-22 23:52:32,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-22 23:52:32,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-12-22 23:52:32,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-22 23:52:32,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-12-22 23:52:32,265 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 50 [2020-12-22 23:52:32,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:32,266 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-12-22 23:52:32,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 23:52:32,266 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-12-22 23:52:32,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 23:52:32,266 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:32,267 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:32,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 23:52:32,480 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:32,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:32,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1409738015, now seen corresponding path program 6 times [2020-12-22 23:52:32,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:32,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822911387] [2020-12-22 23:52:32,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:32,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:32,668 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-22 23:52:32,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822911387] [2020-12-22 23:52:32,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606535469] [2020-12-22 23:52:32,669 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 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 [2020-12-22 23:52:33,097 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-12-22 23:52:33,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:52:33,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 23:52:33,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:52:33,245 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2020-12-22 23:52:33,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:52:33,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 21 [2020-12-22 23:52:33,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076968050] [2020-12-22 23:52:33,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 23:52:33,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:33,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 23:52:33,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2020-12-22 23:52:33,247 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 21 states. [2020-12-22 23:52:33,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:33,373 INFO L93 Difference]: Finished difference Result 87 states and 92 transitions. [2020-12-22 23:52:33,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 23:52:33,373 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 52 [2020-12-22 23:52:33,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:33,374 INFO L225 Difference]: With dead ends: 87 [2020-12-22 23:52:33,374 INFO L226 Difference]: Without dead ends: 61 [2020-12-22 23:52:33,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2020-12-22 23:52:33,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-22 23:52:33,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2020-12-22 23:52:33,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-22 23:52:33,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-12-22 23:52:33,394 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 52 [2020-12-22 23:52:33,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:33,394 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-12-22 23:52:33,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 23:52:33,394 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-12-22 23:52:33,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 23:52:33,395 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:33,395 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:33,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:52:33,612 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:33,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:33,613 INFO L82 PathProgramCache]: Analyzing trace with hash -599772334, now seen corresponding path program 7 times [2020-12-22 23:52:33,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:33,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885207954] [2020-12-22 23:52:33,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:33,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:33,792 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-12-22 23:52:33,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885207954] [2020-12-22 23:52:33,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542855573] [2020-12-22 23:52:33,793 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 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 [2020-12-22 23:52:33,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:33,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 23:52:33,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:52:33,993 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-12-22 23:52:33,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:52:33,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-22 23:52:33,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877035378] [2020-12-22 23:52:33,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 23:52:33,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:33,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 23:52:33,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-22 23:52:33,996 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 17 states. [2020-12-22 23:52:34,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:34,067 INFO L93 Difference]: Finished difference Result 90 states and 94 transitions. [2020-12-22 23:52:34,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 23:52:34,068 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 57 [2020-12-22 23:52:34,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:34,069 INFO L225 Difference]: With dead ends: 90 [2020-12-22 23:52:34,069 INFO L226 Difference]: Without dead ends: 61 [2020-12-22 23:52:34,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-22 23:52:34,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-22 23:52:34,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-12-22 23:52:34,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-22 23:52:34,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-12-22 23:52:34,076 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 57 [2020-12-22 23:52:34,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:34,076 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-12-22 23:52:34,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 23:52:34,076 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-12-22 23:52:34,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 23:52:34,077 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:34,077 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:34,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 23:52:34,291 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:34,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:34,292 INFO L82 PathProgramCache]: Analyzing trace with hash -216486768, now seen corresponding path program 8 times [2020-12-22 23:52:34,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:34,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491472346] [2020-12-22 23:52:34,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:34,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:34,489 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-12-22 23:52:34,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491472346] [2020-12-22 23:52:34,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071727257] [2020-12-22 23:52:34,490 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 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 [2020-12-22 23:52:34,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:52:34,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:52:34,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 23:52:34,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:52:34,656 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-12-22 23:52:34,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:52:34,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-22 23:52:34,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039111084] [2020-12-22 23:52:34,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 23:52:34,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:34,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 23:52:34,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-22 23:52:34,659 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 18 states. [2020-12-22 23:52:34,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:34,728 INFO L93 Difference]: Finished difference Result 92 states and 96 transitions. [2020-12-22 23:52:34,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 23:52:34,729 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 59 [2020-12-22 23:52:34,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:34,730 INFO L225 Difference]: With dead ends: 92 [2020-12-22 23:52:34,730 INFO L226 Difference]: Without dead ends: 63 [2020-12-22 23:52:34,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-22 23:52:34,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-22 23:52:34,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-12-22 23:52:34,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-22 23:52:34,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-12-22 23:52:34,735 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 59 [2020-12-22 23:52:34,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:34,735 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-12-22 23:52:34,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 23:52:34,735 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-12-22 23:52:34,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 23:52:34,736 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:34,736 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:34,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 23:52:34,950 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:34,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:34,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1246245298, now seen corresponding path program 9 times [2020-12-22 23:52:34,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:34,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995450893] [2020-12-22 23:52:34,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:34,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:35,190 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-12-22 23:52:35,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995450893] [2020-12-22 23:52:35,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408445406] [2020-12-22 23:52:35,191 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 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 [2020-12-22 23:52:35,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-22 23:52:35,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:52:35,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-22 23:52:35,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:52:35,793 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-12-22 23:52:35,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:52:35,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 30 [2020-12-22 23:52:35,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445770618] [2020-12-22 23:52:35,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 23:52:35,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:35,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 23:52:35,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=660, Unknown=0, NotChecked=0, Total=870 [2020-12-22 23:52:35,796 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 30 states. [2020-12-22 23:52:36,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:36,552 INFO L93 Difference]: Finished difference Result 101 states and 106 transitions. [2020-12-22 23:52:36,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 23:52:36,552 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 61 [2020-12-22 23:52:36,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:36,553 INFO L225 Difference]: With dead ends: 101 [2020-12-22 23:52:36,553 INFO L226 Difference]: Without dead ends: 72 [2020-12-22 23:52:36,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=518, Invalid=1834, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 23:52:36,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-22 23:52:36,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2020-12-22 23:52:36,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-22 23:52:36,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2020-12-22 23:52:36,559 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 61 [2020-12-22 23:52:36,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:36,559 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2020-12-22 23:52:36,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 23:52:36,559 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2020-12-22 23:52:36,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 23:52:36,560 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:36,560 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 6, 6, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:36,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:52:36,775 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:36,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:36,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1714951042, now seen corresponding path program 10 times [2020-12-22 23:52:36,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:36,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730481234] [2020-12-22 23:52:36,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:36,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:37,045 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-12-22 23:52:37,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730481234] [2020-12-22 23:52:37,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130878840] [2020-12-22 23:52:37,047 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 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 [2020-12-22 23:52:37,136 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:52:37,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:52:37,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 23:52:37,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:52:37,224 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-12-22 23:52:37,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:52:37,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-22 23:52:37,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271697444] [2020-12-22 23:52:37,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 23:52:37,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:37,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 23:52:37,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-22 23:52:37,226 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 20 states. [2020-12-22 23:52:37,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:37,296 INFO L93 Difference]: Finished difference Result 104 states and 108 transitions. [2020-12-22 23:52:37,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 23:52:37,296 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 67 [2020-12-22 23:52:37,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:37,297 INFO L225 Difference]: With dead ends: 104 [2020-12-22 23:52:37,297 INFO L226 Difference]: Without dead ends: 71 [2020-12-22 23:52:37,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-22 23:52:37,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-22 23:52:37,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-12-22 23:52:37,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-22 23:52:37,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-12-22 23:52:37,302 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 67 [2020-12-22 23:52:37,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:37,303 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-12-22 23:52:37,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 23:52:37,303 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-12-22 23:52:37,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 23:52:37,303 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:37,304 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 6, 6, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:37,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:52:37,518 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:37,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:37,519 INFO L82 PathProgramCache]: Analyzing trace with hash -152004800, now seen corresponding path program 11 times [2020-12-22 23:52:37,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:37,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813491846] [2020-12-22 23:52:37,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:37,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:37,844 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-12-22 23:52:37,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813491846] [2020-12-22 23:52:37,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920160476] [2020-12-22 23:52:37,845 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 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 [2020-12-22 23:52:48,255 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-22 23:52:48,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:52:48,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 23:52:48,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:52:48,390 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-12-22 23:52:48,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:52:48,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-22 23:52:48,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053624047] [2020-12-22 23:52:48,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 23:52:48,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:48,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 23:52:48,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-22 23:52:48,393 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 21 states. [2020-12-22 23:52:48,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:48,474 INFO L93 Difference]: Finished difference Result 106 states and 110 transitions. [2020-12-22 23:52:48,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 23:52:48,475 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 69 [2020-12-22 23:52:48,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:48,475 INFO L225 Difference]: With dead ends: 106 [2020-12-22 23:52:48,476 INFO L226 Difference]: Without dead ends: 73 [2020-12-22 23:52:48,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-22 23:52:48,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-22 23:52:48,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2020-12-22 23:52:48,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-22 23:52:48,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-12-22 23:52:48,481 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 69 [2020-12-22 23:52:48,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:48,482 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-12-22 23:52:48,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 23:52:48,482 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-12-22 23:52:48,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 23:52:48,483 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:48,483 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 6, 6, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:48,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:52:48,696 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:48,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:48,697 INFO L82 PathProgramCache]: Analyzing trace with hash 999760766, now seen corresponding path program 12 times [2020-12-22 23:52:48,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:48,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737255862] [2020-12-22 23:52:48,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:48,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:49,013 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-12-22 23:52:49,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737255862] [2020-12-22 23:52:49,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568615603] [2020-12-22 23:52:49,014 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 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 [2020-12-22 23:52:49,579 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-22 23:52:49,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:52:49,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 23:52:49,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:52:49,790 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2020-12-22 23:52:49,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:52:49,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 28 [2020-12-22 23:52:49,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398402491] [2020-12-22 23:52:49,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 23:52:49,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:49,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 23:52:49,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2020-12-22 23:52:49,793 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 28 states. [2020-12-22 23:52:49,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:49,915 INFO L93 Difference]: Finished difference Result 113 states and 118 transitions. [2020-12-22 23:52:49,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 23:52:49,916 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 71 [2020-12-22 23:52:49,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:49,916 INFO L225 Difference]: With dead ends: 113 [2020-12-22 23:52:49,917 INFO L226 Difference]: Without dead ends: 80 [2020-12-22 23:52:49,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2020-12-22 23:52:49,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-22 23:52:49,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2020-12-22 23:52:49,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-12-22 23:52:49,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2020-12-22 23:52:49,922 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 71 [2020-12-22 23:52:49,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:49,923 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2020-12-22 23:52:49,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 23:52:49,923 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2020-12-22 23:52:49,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 23:52:49,923 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:49,924 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 7, 7, 7, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:50,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 23:52:50,139 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:50,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:50,140 INFO L82 PathProgramCache]: Analyzing trace with hash -42628477, now seen corresponding path program 13 times [2020-12-22 23:52:50,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:50,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405003029] [2020-12-22 23:52:50,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:50,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:50,462 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-12-22 23:52:50,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405003029] [2020-12-22 23:52:50,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108018647] [2020-12-22 23:52:50,463 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 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 [2020-12-22 23:52:50,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:50,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 23:52:50,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:52:50,660 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-12-22 23:52:50,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:52:50,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-22 23:52:50,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144370847] [2020-12-22 23:52:50,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 23:52:50,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:50,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 23:52:50,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-22 23:52:50,662 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 23 states. [2020-12-22 23:52:50,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:50,744 INFO L93 Difference]: Finished difference Result 116 states and 120 transitions. [2020-12-22 23:52:50,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 23:52:50,744 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 76 [2020-12-22 23:52:50,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:50,745 INFO L225 Difference]: With dead ends: 116 [2020-12-22 23:52:50,745 INFO L226 Difference]: Without dead ends: 80 [2020-12-22 23:52:50,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-22 23:52:50,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-22 23:52:50,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-12-22 23:52:50,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-22 23:52:50,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2020-12-22 23:52:50,749 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 76 [2020-12-22 23:52:50,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:50,750 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2020-12-22 23:52:50,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 23:52:50,750 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2020-12-22 23:52:50,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 23:52:50,750 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:50,751 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 7, 7, 7, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:50,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 23:52:50,978 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:50,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:50,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1625138043, now seen corresponding path program 14 times [2020-12-22 23:52:50,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:50,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461780818] [2020-12-22 23:52:50,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:51,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:51,330 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-12-22 23:52:51,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461780818] [2020-12-22 23:52:51,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522829505] [2020-12-22 23:52:51,331 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 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 [2020-12-22 23:52:51,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:52:51,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:52:51,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 23:52:51,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:52:51,535 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-12-22 23:52:51,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:52:51,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-22 23:52:51,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188710008] [2020-12-22 23:52:51,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 23:52:51,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:51,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 23:52:51,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-22 23:52:51,537 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 24 states. [2020-12-22 23:52:51,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:51,626 INFO L93 Difference]: Finished difference Result 118 states and 122 transitions. [2020-12-22 23:52:51,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 23:52:51,627 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 78 [2020-12-22 23:52:51,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:51,627 INFO L225 Difference]: With dead ends: 118 [2020-12-22 23:52:51,628 INFO L226 Difference]: Without dead ends: 82 [2020-12-22 23:52:51,628 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-22 23:52:51,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-22 23:52:51,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-12-22 23:52:51,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-22 23:52:51,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2020-12-22 23:52:51,633 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 78 [2020-12-22 23:52:51,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:51,633 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2020-12-22 23:52:51,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 23:52:51,633 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2020-12-22 23:52:51,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 23:52:51,634 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:51,634 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 7, 7, 7, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:51,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:52:51,848 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:51,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:51,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1998408185, now seen corresponding path program 15 times [2020-12-22 23:52:51,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:51,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546049647] [2020-12-22 23:52:51,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:51,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:52,286 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-12-22 23:52:52,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546049647] [2020-12-22 23:52:52,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288244185] [2020-12-22 23:52:52,287 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 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 [2020-12-22 23:52:52,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-22 23:52:52,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:52:52,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 23:52:52,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:52:52,715 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 449 trivial. 0 not checked. [2020-12-22 23:52:52,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:52:52,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 10] total 32 [2020-12-22 23:52:52,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84549495] [2020-12-22 23:52:52,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 23:52:52,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:52,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 23:52:52,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2020-12-22 23:52:52,718 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 32 states. [2020-12-22 23:52:52,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:52,876 INFO L93 Difference]: Finished difference Result 125 states and 130 transitions. [2020-12-22 23:52:52,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 23:52:52,876 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 80 [2020-12-22 23:52:52,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:52,877 INFO L225 Difference]: With dead ends: 125 [2020-12-22 23:52:52,877 INFO L226 Difference]: Without dead ends: 89 [2020-12-22 23:52:52,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2020-12-22 23:52:52,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-22 23:52:52,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2020-12-22 23:52:52,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-12-22 23:52:52,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2020-12-22 23:52:52,882 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 80 [2020-12-22 23:52:52,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:52,883 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2020-12-22 23:52:52,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 23:52:52,883 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2020-12-22 23:52:52,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-22 23:52:52,883 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:52,884 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 8, 8, 8, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:53,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 23:52:53,097 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:53,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:53,098 INFO L82 PathProgramCache]: Analyzing trace with hash -756097898, now seen corresponding path program 16 times [2020-12-22 23:52:53,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:53,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509692991] [2020-12-22 23:52:53,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:53,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:53,484 INFO L134 CoverageAnalysis]: Checked inductivity of 584 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-22 23:52:53,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509692991] [2020-12-22 23:52:53,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272564782] [2020-12-22 23:52:53,484 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 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 [2020-12-22 23:52:53,582 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:52:53,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:52:53,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 23:52:53,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:52:53,829 INFO L134 CoverageAnalysis]: Checked inductivity of 584 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 492 trivial. 0 not checked. [2020-12-22 23:52:53,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:52:53,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 11] total 34 [2020-12-22 23:52:53,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058210746] [2020-12-22 23:52:53,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-22 23:52:53,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:53,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-22 23:52:53,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=768, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 23:52:53,831 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 34 states. [2020-12-22 23:52:53,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:53,977 INFO L93 Difference]: Finished difference Result 133 states and 138 transitions. [2020-12-22 23:52:53,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 23:52:53,978 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 85 [2020-12-22 23:52:53,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:53,979 INFO L225 Difference]: With dead ends: 133 [2020-12-22 23:52:53,979 INFO L226 Difference]: Without dead ends: 94 [2020-12-22 23:52:53,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=354, Invalid=768, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 23:52:53,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-22 23:52:53,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2020-12-22 23:52:53,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-22 23:52:53,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2020-12-22 23:52:53,985 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 85 [2020-12-22 23:52:53,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:53,985 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2020-12-22 23:52:53,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-22 23:52:53,985 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2020-12-22 23:52:53,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-22 23:52:53,986 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:53,986 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 9, 9, 9, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:54,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:52:54,200 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:54,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:54,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1148416277, now seen corresponding path program 17 times [2020-12-22 23:52:54,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:54,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588275888] [2020-12-22 23:52:54,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:54,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:54,610 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-12-22 23:52:54,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588275888] [2020-12-22 23:52:54,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611716256] [2020-12-22 23:52:54,611 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 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